Import 2.1.100pre2

Documentation/mtrr.txt

 MTRR (Memory Type Range Register) control
-17 Dec 1997
+2 May 1998
 Richard Gooch
 <rgooch@atnf.csiro.au>
 
-  On Intel Pentium Pro systems the Memory Type Range Registers (MTRRs)
-  may be used to control processor access to memory ranges. This is
-  most useful when you have a video (VGA) card on the PCI
-  bus. Enabling write-combining allows PCI write transfers to be
-  combined into a larger transfer before bursting over the PCI
-  bus. This can increase performance of image write operations 2.5
-  times or more.
+  On Intel Pentium Pro/Pentium II systems the Memory Type Range
+  Registers (MTRRs) may be used to control processor access to memory
+  ranges. This is most useful when you have a video (VGA) card on a
+  PCI or AGP bus. Enabling write-combining allows bus write transfers
+  to be combined into a larger transfer before bursting over the
+  PCI/AGP bus. This can increase performance of image write operations
+  2.5 times or more.
 
   The CONFIG_MTRR option creates a /proc/mtrr file which may be used
   to manipulate your MTRRs. Typically the X server should use
@@ -30,13 +30,40 @@ Reading MTRRs from the shell:
 % cat /proc/mtrr
 reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
 reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
-reg05: base=0x80000000 (2048MB), size=   4MB: write-combining, count=1
 ===============================================================================
 Creating MTRRs from the shell:
-% echo "base=0x80000000 size=0x400000 type=write-combining" >! /proc/mtrr
+# echo "base=0xf8000000 size=0x400000 type=write-combining" >! /proc/mtrr
+
+And the result thereof:
+% cat /proc/mtrr
+reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
+reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
+reg02: base=0xf8000000 (3968MB), size=   4MB: write-combining, count=1
+
+This is for videoram at base address 0xf8000000 and size 4 MBytes. To
+find out your base address, you need to look at the output of your X
+server, which tells you where the linear framebuffer address is. A
+typical line that you may get is:
+
+(--) S3: PCI: 968 rev 0, Linear FB @ 0xf8000000
+
+Note that you should only use the value from the X server, as it may
+move the framebuffer base address, so the only value you can trust is
+that reported by the X server.
+
+To find out the size of your framebuffer (what, you don't actually
+know?), the following line will tell you:
+
+(--) S3: videoram:  4096k
+
+That's 4 MBytes, which is 0x400000 bytes (in hexadecimal).
+A patch is being written for XFree86 which will make this automatic:
+in other words the X server will manipulate /proc/mtrr using the
+ioctl() interface, so users won't have to do anything. If you use a
+commercial X server, lobby your vendor to add support for MTRRs.
 ===============================================================================
 Removing MTRRs from the shell:
-% echo "disable=5" >! /proc/mtrr
+% echo "disable=2" >! /proc/mtrr
 ===============================================================================
 Reading MTRRs from a C programme using ioctl()'s:
 
@@ -44,7 +71,7 @@ Reading MTRRs from a C programme using ioctl()'s:
 
     Source file for mtrr-show (example programme to show MTRRs using ioctl()'s)
 
-    Copyright (C) 1997  Richard Gooch
+    Copyright (C) 1997-1998  Richard Gooch
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -72,7 +99,7 @@ Reading MTRRs from a C programme using ioctl()'s:
 
     Written by      Richard Gooch   17-DEC-1997
 
-    Last updated by Richard Gooch   17-DEC-1997
+    Last updated by Richard Gooch   2-MAY-1998
 
 
 */
@@ -84,7 +111,7 @@ Reading MTRRs from a C programme using ioctl()'s:
 #include <sys/ioctl.h>
 #include <errno.h>
 #define MTRR_NEED_STRINGS
-#include <linux/mtrr.h>
+#include <asm/mtrr.h>
 
 #define TRUE 1
 #define FALSE 0
@@ -130,7 +157,7 @@ Creating MTRRs from a C programme using ioctl()'s:
 
     Source file for mtrr-add (example programme to add an MTRRs using ioctl())
 
-    Copyright (C) 1997  Richard Gooch
+    Copyright (C) 1997-1998  Richard Gooch
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -158,7 +185,7 @@ Creating MTRRs from a C programme using ioctl()'s:
 
     Written by      Richard Gooch   17-DEC-1997
 
-    Last updated by Richard Gooch   17-DEC-1997
+    Last updated by Richard Gooch   2-MAY-1998
 
 
 */
@@ -172,7 +199,7 @@ Creating MTRRs from a C programme using ioctl()'s:
 #include <sys/ioctl.h>
 #include <errno.h>
 #define MTRR_NEED_STRINGS
-#include <linux/mtrr.h>
+#include <asm/mtrr.h>
 
 #define TRUE 1
 #define FALSE 0

Documentation/sysctl/vm.txt

@@ -18,6 +18,7 @@ Currently, these files are in /proc/sys/vm:
 - bdflush
 - buffermem
 - freepages
+- kswapd
 - overcommit_memory
 - pagecache
 - swapctl
@@ -112,9 +113,58 @@ freepages:
 This file contains the values in the struct freepages. That
 struct contains three members: min, low and high.
 
-These variables are currently unused (?), but they're
-very likely to be abused for something else in the near
-future, so don't yet remove it from the source...
+Although the goal of the Linux memory management subsystem
+is to avoid fragmentation and make large chunks of free
+memory (so that we can hand out DMA buffers and such), there
+still are some page-based limits in the system, mainly to
+make sure we don't waste too much memory trying to get large
+free area's.
+
+The meaning of the numbers is:
+
+freepages.min	When the number of free pages in the system
+		reaches this number, only the kernel can
+		allocate more memory.
+freepages.low	If memory is too fragmented, the swapout
+		daemon is started, except when the number
+		of free pages is larger than freepages.low.
+freepages.high	The swapping daemon exits when memory is
+		sufficiently defragmented, when the number
+		of free pages reaches freepages.high or when
+		it has tried the maximum number of times. 
+
+==============================================================
+
+kswapd:
+
+Kswapd is the kernel swapout daemon. That is, kswapd is that
+piece of the kernel that frees memory when it get's fragmented
+or full. Since every system is different, you'll probably want
+some control over this piece of the system.
+
+The numbers in this page correspond to the numbers in the
+struct pager_daemon {tries_base, tries_min, swap_cluster
+}; The tries_base and swap_cluster probably have the
+largest influence on system performance.
+
+tries_base	The maximum number of pages kswapd tries to
+		free in one round is calculated from this
+		number. Usually this number will be divided
+		by 4 or 8 (see mm/vmscan.c), so it isn't as
+		big as it looks.
+		When you need to increase the bandwith to/from
+		swap, you'll want to increase this number.
+tries_min	This is the minimum number of times kswapd
+		tries to free a page each time it is called.
+		Basically it's just there to make sure that
+		kswapd frees some pages even when it's being
+		called with minimum priority.
+swap_cluster	This is the number of pages kswapd writes in
+		one turn. You want this large so that kswapd
+		does it's I/O in large chunks and the disk
+		doesn't have to seek often, but you don't want
+		it to be too large since that would flood the
+		request queue.
 
 ==============================================================
 

arch/i386/kernel/bios32.c

 /*
  * bios32.c - Low-Level PCI Access
  *
- * $Id: bios32.c,v 1.29 1998/04/17 16:31:15 mj Exp $
+ * $Id: bios32.c,v 1.32 1998/05/02 12:03:05 davem Exp $
  *
  * Sponsored by
  *	iX Multiuser Multitasking Magazine
@@ -66,6 +66,8 @@
  *	and cleaned it up...     Martin Mares <mj@atrey.karlin.mff.cuni.cz>
  *
  * Feb 6,  1998 : No longer using BIOS to find devices and device classes. [mj]
+ *
+ * May 1,  1998 : Support for peer host bridges. [mj]
  */
 
 #include <linux/config.h>
@@ -74,6 +76,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
+#include <linux/malloc.h>
 
 #include <asm/page.h>
 #include <asm/segment.h>
@@ -832,7 +835,10 @@ __initfunc(static struct pci_access *pci_find_bios(void))
 }
 
 /*
- * Sort the device list according to PCI BIOS.
+ * Sort the device list according to PCI BIOS. Nasty hack, but since some
+ * fool forgot to define the `correct' device order in the PCI BIOS specs
+ * and we want to be (possibly bug-to-bug ;-]) compatible with older kernels
+ * which used BIOS ordering, we are bound to do this...
  */
 
 __initfunc(void pcibios_sort(void))
@@ -924,11 +930,41 @@ __initfunc(void pcibios_fixup_io_addr(struct pci_dev *dev, int idx))
 }
 
 /*
- * Arch-dependent fixups. We need to fix here base addresses, I/O
- * and memory enables and IRQ's as the PCI BIOS'es are buggy as hell.
+ * In case there are peer host bridges, scan bus behind each of them.
+ * Although several sources claim that the host bridges should have
+ * header type 1 and be assigned a bus number as for PCI2PCI bridges,
+ * the reality doesn't pass this test and the bus number is usually
+ * hard-wired to 1.
  */
+__initfunc(void pcibios_fixup_peer_bridges(void))
+{
+	struct pci_dev *dev;
+	int cnt = 0;
+
+	for(dev=pci_root.devices; dev; dev=dev->sibling)
+		if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST) {
+			DBG("PCI: Host bridge at %02x\n", dev->devfn);
+			if (cnt) {
+				struct pci_bus *b = kmalloc(sizeof(struct pci_bus), GFP_KERNEL);
+				memset(b, 0, sizeof(*b));
+				b->parent = &pci_root;
+				b->next = pci_root.next;
+				pci_root.next = b;
+				b->self = dev;
+				b->number = b->secondary = cnt;
+				b->subordinate = 0xff;
+				b->subordinate = pci_scan_bus(b);
+			}
+			cnt++;
+		}
+}
 
-__initfunc(void pcibios_fixup(void))
+/*
+ * Fix base addresses, I/O and memory enables and IRQ's (mostly work-arounds
+ * for buggy PCI BIOS'es :-[).
+ */
+
+__initfunc(void pcibios_fixup_devices(void))
 {
 	struct pci_dev *dev;
 	int i, has_io, has_mem;
@@ -991,6 +1027,16 @@ __initfunc(void pcibios_fixup(void))
 		if (dev->irq >= NR_IRQS)
 			dev->irq = 0;
 	}
+}
+
+/*
+ * Arch-dependent fixups.
+ */
+
+__initfunc(void pcibios_fixup(void))
+{
+	pcibios_fixup_peer_bridges();
+	pcibios_fixup_devices();
 
 #ifdef CONFIG_PCI_BIOS
 	if ((pci_probe & PCI_BIOS_SORT) && !(pci_probe & PCI_NO_SORT))

arch/i386/kernel/irq.c

@@ -735,7 +735,11 @@ static void do_8259A_IRQ(unsigned int irq, int cpu, struct pt_regs * regs)
 static void enable_ioapic_irq(unsigned int irq)
 {
 	irq_desc_t *desc = irq_desc + irq;
+#if 0
+	enable_IO_APIC_irq(irq);
+#endif
 	if (desc->events && !desc->ipi) {
+		ack_APIC_irq();
 		desc->ipi = 1;
 		send_IPI(APIC_DEST_SELF, IO_APIC_VECTOR(irq));
 	}
@@ -746,6 +750,9 @@ static void enable_ioapic_irq(unsigned int irq)
  */
 static void disable_ioapic_irq(unsigned int irq)
 {
+#if 0
+	disable_IO_APIC_irq(irq);
+#endif
 }
 
 static void do_ioapic_IRQ(unsigned int irq, int cpu, struct pt_regs * regs)
@@ -754,13 +761,15 @@ static void do_ioapic_IRQ(unsigned int irq, int cpu, struct pt_regs * regs)
 
 	spin_lock(&irq_controller_lock);
 
-	/* Ack the irq inside the lock! */
-	ack_APIC_irq();
 	desc->ipi = 0;
 
-	/* If the irq is disabled for whatever reason, just set a flag and return */
+	/*
+	 * If the irq is disabled for whatever reason, just
+	 * set a flag and return
+	 */
 	if (desc->status & (IRQ_DISABLED | IRQ_INPROGRESS)) {
 		desc->events = 1;
+		ack_APIC_irq();
 		spin_unlock(&irq_controller_lock);
 		return;
 	}
@@ -790,6 +799,7 @@ static void do_ioapic_IRQ(unsigned int irq, int cpu, struct pt_regs * regs)
 	spin_unlock(&irq_controller_lock);
 
 no_handler:
+	ack_APIC_irq();
 	hardirq_exit(cpu);
 	release_irqlock(cpu);
 }

arch/i386/kernel/mtrr.c

@@ -104,6 +104,12 @@
 	       Moved register-setting macros into this file.
 	       Moved setup code from init/main.c to i386-specific areas.
   v1.18
+    19980502   Richard Gooch <rgooch@atnf.csiro.au>
+	       Moved MTRR detection outside conditionals in <mtrr_init>.
+  v1.19
+    19980502   Richard Gooch <rgooch@atnf.csiro.au>
+	       Documentation improvement: mention Pentium II and AGP.
+  v1.20
 */
 #include <linux/types.h>
 #include <linux/errno.h>
@@ -137,7 +143,7 @@
 #include <asm/atomic.h>
 #include <linux/smp.h>
 
-#define MTRR_VERSION            "1.18 (19980429)"
+#define MTRR_VERSION            "1.20 (19980502)"
 
 #define TRUE  1
 #define FALSE 0
@@ -801,7 +807,7 @@ int mtrr_add (unsigned long base, unsigned long size, unsigned int type,
 	if (ltype != type)
 	{
 	    spin_unlock (&main_lock);
-	    printk ( "mtrr: type missmatch for %lx,%lx old: %s new: %s\n",
+	    printk ( "mtrr: type mismatch for %lx,%lx old: %s new: %s\n",
 		     base, size, attrib_to_str (ltype), attrib_to_str (type) );
 	    return -EINVAL;
 	}
@@ -1193,8 +1199,8 @@ int init_module (void)
 __initfunc(int mtrr_init(void))
 #endif
 {
-#  if !defined(__SMP__) || defined(MODULE) 
     if ( !(boot_cpu_data.x86_capability & X86_FEATURE_MTRR) ) return 0;
+#  if !defined(__SMP__) || defined(MODULE) 
     printk("mtrr: v%s Richard Gooch (rgooch@atnf.csiro.au)\n", MTRR_VERSION);
 #endif
 

arch/i386/kernel/process.c

@@ -297,9 +297,9 @@ void machine_restart(char * __unused)
 			int i;
 			for (i=0; i<100; i++) {
 				kb_wait();
-				udelay(10);
+				udelay(50);
 				outb(0xfe,0x64);         /* pulse reset low */
-				udelay(10);
+				udelay(50);
 			}
 			/* That didn't work - force a triple fault.. */
 			__asm__ __volatile__("lidt %0": :"m" (no_idt));

arch/i386/kernel/smp.c

@@ -627,20 +627,29 @@ __initfunc(void smp_commence(void))
 	smp_commenced=1;
 }
 
+__initfunc(void enable_local_APIC(void))
+{
+	unsigned long value;
+
+ 	value = apic_read(APIC_SPIV);
+ 	value |= (1<<8);		/* Enable APIC (bit==1) */
+ 	value &= ~(1<<9);		/* Enable focus processor (bit==0) */
+ 	apic_write(APIC_SPIV,value);
+
+	udelay(100);			/* B safe */
+}
+
 __initfunc(void smp_callin(void))
 {
 	extern void calibrate_delay(void);
 	int cpuid=GET_APIC_ID(apic_read(APIC_ID));
-	unsigned long l;
 
 	/*
 	 *	Activate our APIC
 	 */
 	
 	SMP_PRINTK(("CALLIN %d %d\n",hard_smp_processor_id(), smp_processor_id()));
- 	l=apic_read(APIC_SPIV);
- 	l|=(1<<8);		/* Enable */
- 	apic_write(APIC_SPIV,l);
+	enable_local_APIC();
 
 	/*
 	 * Set up our APIC timer.
@@ -1004,15 +1013,7 @@ __initfunc(void smp_boot_cpus(void))
 	}
 #endif
 
-	/*
-	 *	Enable the local APIC
-	 */
-
-	cfg=apic_read(APIC_SPIV);
-	cfg|=(1<<8);		/* Enable APIC */
-	apic_write(APIC_SPIV,cfg);
-
-	udelay(10);
+	enable_local_APIC();
 
 	/*
 	 * Set up our local APIC timer:
@@ -1561,7 +1562,7 @@ __initfunc(static unsigned int get_8254_timer_count (void))
  * APIC double write bug.
  */
 
-#define APIC_DIVISOR 16
+#define APIC_DIVISOR 1
 
 void setup_APIC_timer (unsigned int clocks)
 {
@@ -1585,7 +1586,7 @@ void setup_APIC_timer (unsigned int clocks)
 	 */
 	tmp_value = apic_read(APIC_TDCR);
 	apic_write(APIC_TDCR , (tmp_value & ~APIC_TDR_DIV_1 )
-				 | APIC_TDR_DIV_16);
+				 | APIC_TDR_DIV_1);
 
 	tmp_value = apic_read(APIC_TMICT);
 	apic_write(APIC_TMICT, clocks/APIC_DIVISOR);

drivers/block/raid5.c

@@ -1209,6 +1209,14 @@ static int raid5_make_request (struct md_dev *mddev, int rw, struct buffer_head
 	sh->pd_idx = pd_idx;
 	if (sh->phase != PHASE_COMPLETE && sh->phase != PHASE_BEGIN)
 		PRINTK(("stripe %lu catching the bus!\n", sh->sector));
+	if (sh->bh_new[dd_idx]) {
+		printk("raid5: bug: stripe->bh_new[%d], sector %lu exists\n", dd_idx, sh->sector);
+		printk("raid5: bh %p, bh_new %p\n", bh, sh->bh_new[dd_idx]);
+		lock_stripe(sh);
+		md_wakeup_thread(raid_conf->thread);
+		wait_on_stripe(sh);
+		goto repeat;
+	}
 	add_stripe_bh(sh, bh, dd_idx, rw);
 
 	md_wakeup_thread(raid_conf->thread);

drivers/misc/parport_procfs.c

@@ -37,8 +37,8 @@ static int irq_write_proc(struct file *file, const char *buffer,
 	int retval = -EINVAL;
 	int newirq = PARPORT_IRQ_NONE;
 	struct parport *pp = (struct parport *)data;
-	struct pardevice *cad = pp->cad;
 	int oldirq = pp->irq;
+	unsigned long flags;
 
 /*
  * We can have these valid cases:
@@ -70,36 +70,31 @@ static int irq_write_proc(struct file *file, const char *buffer,
 	if (oldirq == newirq)
 		goto out;
 
+	spin_lock_irqsave(&port->lock, flags);
 	if (pp->flags & PARPORT_FLAG_COMA)
 		goto out_ok;
 
-	if (newirq != PARPORT_IRQ_NONE) { 
-		void (*handler)(int, void *, struct pt_regs *);
-
-		if (cad && cad->irq_func)
-			handler = cad->irq_func;
-		else
-			handler = parport_null_intr_func;
+	retval = -EBUSY;
+	if (pp->cad)
+		goto out_unlock;
 
-		retval = request_irq(newirq, handler,
-				     SA_INTERRUPT,
-				     cad ? cad->name : pp->name,
-				     cad ? cad->private : NULL);
+	if (newirq != PARPORT_IRQ_NONE) { 
+		retval = request_irq(newirq, parport_null_intr_func,
+				     SA_INTERRUPT, pp->name, NULL);
 		if (retval)
-			goto out;
+			goto out_unlock;
 		else retval = count;
 	}
 
-	if (oldirq != PARPORT_IRQ_NONE) {
-		if (cad && cad->irq_func)
-			free_irq(oldirq, cad->private);
-		else
-			free_irq(oldirq, NULL);
-	}
+	if (oldirq != PARPORT_IRQ_NONE)
+		free_irq(oldirq, NULL);
 
 out_ok:
 	pp->irq = newirq;
 
+out_unlock:
+	spin_unlock_irqrestore (&pp->lock, flags);
+
 out:
 	return retval;
 }

drivers/misc/parport_share.c

@@ -308,7 +308,9 @@ int parport_claim(struct pardevice *dev)
 	}
 
 	/* Now we do the change of devices */
+	spin_lock_irqsave(&port->lock, flags);
 	port->cad = dev;
+	spin_unlock_irqrestore(&port->lock, flags);
 
 	/* Swap the IRQ handlers. */
 	if (port->irq != PARPORT_IRQ_NONE) {
@@ -346,9 +348,8 @@ int parport_claim(struct pardevice *dev)
 			dev->waitprev = port->waittail;
 			if (port->waittail)
 				port->waittail->waitnext = dev;
-			else {
-				port->waithead = dev->port->waittail = dev;
-			}
+			else
+				port->waithead = port->waittail = dev;
 		}
 		spin_unlock_irqrestore (&port->lock, flags);
 	}

drivers/net/ppp.c

@@ -8,7 +8,7 @@
  *  Dynamic PPP devices by Jim Freeman <jfree@caldera.com>.
  *  ppp_tty_receive ``noisy-raise-bug'' fixed by Ove Ewerlid <ewerlid@syscon.uu.se>
  *
- *  ==FILEVERSION 980319==
+ *  ==FILEVERSION 980501==
  *
  *  NOTE TO MAINTAINERS:
  *     If you modify this file at all, please set the number above to the
@@ -107,8 +107,10 @@ typedef struct sk_buff	     sk_buff;
 #define PPP_LQR 0xc025	/* Link Quality Reporting Protocol */
 #endif
 
+#ifdef CONFIG_MODULES
 static int ppp_register_compressor (struct compressor *cp);
 static void ppp_unregister_compressor (struct compressor *cp);
+#endif
 
 /*
  * Local functions
@@ -3210,6 +3212,7 @@ static struct compressor *find_compressor (int type)
 	return (struct compressor *) 0;
 }
 
+#ifdef CONFIG_MODULES
 static int ppp_register_compressor (struct compressor *cp)
 {
 	struct compressor_link *new;
@@ -3261,6 +3264,7 @@ static void ppp_unregister_compressor (struct compressor *cp)
 	}
 	restore_flags(flags);
 }
+#endif
 
 /*************************************************************
  * Module support routines

drivers/pci/pci.c

 /*
- *	$Id: pci.c,v 1.79 1998/04/17 16:25:24 mj Exp $
+ *	$Id: pci.c,v 1.84 1998/05/02 19:22:06 mj Exp $
  *
  *	PCI Bus Services
  *
@@ -68,11 +68,48 @@ pci_find_class(unsigned int class, struct pci_dev *from)
 }
 
 
+int
+pci_read_config_byte(struct pci_dev *dev, u8 where, u8 *val)
+{
+	return pcibios_read_config_byte(dev->bus->number, dev->devfn, where, val);
+}
+
+int
+pci_read_config_word(struct pci_dev *dev, u8 where, u16 *val)
+{
+	return pcibios_read_config_word(dev->bus->number, dev->devfn, where, val);
+}
+
+int
+pci_read_config_dword(struct pci_dev *dev, u8 where, u32 *val)
+{
+	return pcibios_read_config_dword(dev->bus->number, dev->devfn, where, val);
+}
+
+int
+pci_write_config_byte(struct pci_dev *dev, u8 where, u8 val)
+{
+	return pcibios_write_config_byte(dev->bus->number, dev->devfn, where, val);
+}
+
+int
+pci_write_config_word(struct pci_dev *dev, u8 where, u16 val)
+{
+	return pcibios_write_config_word(dev->bus->number, dev->devfn, where, val);
+}
+
+int
+pci_write_config_dword(struct pci_dev *dev, u8 where, u32 val)
+{
+	return pcibios_write_config_dword(dev->bus->number, dev->devfn, where, val);
+}
+
+
 void
 pci_set_master(struct pci_dev *dev)
 {
-	unsigned short cmd;
-	unsigned char lat;
+	u16 cmd;
+	u8 lat;
 
 	pci_read_config_word(dev, PCI_COMMAND, &cmd);
 	if (! (cmd & PCI_COMMAND_MASTER)) {
@@ -89,16 +126,43 @@ pci_set_master(struct pci_dev *dev)
 	}
 }
 
+__initfunc(void pci_read_bases(struct pci_dev *dev, unsigned int howmany))
+{
+	unsigned int reg;
+	u32 l;
+
+	for(reg=0; reg<howmany; reg++) {
+		pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + (reg << 2), &l);
+		if (l == 0xffffffff)
+			continue;
+		dev->base_address[reg] = l;
+		if ((l & PCI_MEMORY_RANGE_TYPE_MASK) == PCI_BASE_ADDRESS_MEM_TYPE_64) {
+			reg++;
+			pci_read_config_dword(dev, PCI_BASE_ADDRESS_0 + (reg << 2), &l);
+			if (l) {
+#if BITS_PER_LONG == 64
+				dev->base_address[reg-1] |= ((unsigned long) l) << 32;
+#else
+				printk("PCI: Unable to handle 64-bit address for device %02x:%02x\n",
+					dev->bus->number, dev->devfn);
+				dev->base_address[reg-1] = 0;
+#endif
+			}
+		}
+	}
+}
+
 
 __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 {
 	unsigned int devfn, l, max, class;
 	unsigned char cmd, irq, tmp, hdr_type, is_multi = 0;
-	struct pci_dev *dev;
+	struct pci_dev *dev, **bus_last;
 	struct pci_bus *child;
 	int reg;
 
 	DBG("pci_scan_bus for bus %d\n", bus->number);
+	bus_last = &bus->devices;
 	max = bus->secondary;
 	for (devfn = 0; devfn < 0xff; ++devfn) {
 		if (PCI_FUNC(devfn) && !is_multi) {
@@ -111,8 +175,8 @@ __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 
 		pcibios_read_config_dword(bus->number, devfn, PCI_VENDOR_ID, &l);
 		/* some broken boards return 0 if a slot is empty: */
-		if (l == 0xffffffff || l == 0x00000000) {
-			hdr_type = 0;
+		if (l == 0xffffffff || l == 0x00000000 || l == 0x0000ffff || l == 0xffff0000) {
+			is_multi = 0;
 			continue;
 		}
 
@@ -133,11 +197,12 @@ __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 		pcibios_read_config_dword(bus->number, devfn, PCI_CLASS_REVISION, &class);
 		class >>= 8;				    /* upper 3 bytes */
 		dev->class = class;
+		class >>= 8;
 		dev->hdr_type = hdr_type;
 
 		switch (hdr_type & 0x7f) {		    /* header type */
 		case PCI_HEADER_TYPE_NORMAL:		    /* standard header */
-			if (class >> 8 == PCI_CLASS_BRIDGE_PCI)
+			if (class == PCI_CLASS_BRIDGE_PCI)
 				goto bad;
 			/*
 			 * If the card generates interrupts, read IRQ number
@@ -151,25 +216,19 @@ __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 			 * read base address registers, again pcibios_fixup() can
 			 * tweak these
 			 */
-			for (reg = 0; reg < 6; reg++) {
-				pcibios_read_config_dword(bus->number, devfn, PCI_BASE_ADDRESS_0 + (reg << 2), &l);
-				dev->base_address[reg] = (l == 0xffffffff) ? 0 : l;
-			}
+			pci_read_bases(dev, 6);
 			pcibios_read_config_dword(bus->number, devfn, PCI_ROM_ADDRESS, &l);
 			dev->rom_address = (l == 0xffffffff) ? 0 : l;
 			break;
 		case PCI_HEADER_TYPE_BRIDGE:		    /* bridge header */
-			if (class >> 8 != PCI_CLASS_BRIDGE_PCI)
+			if (class != PCI_CLASS_BRIDGE_PCI)
 				goto bad;
-			for (reg = 0; reg < 2; reg++) {
-				pcibios_read_config_dword(bus->number, devfn, PCI_BASE_ADDRESS_0 + (reg << 2), &l);
-				dev->base_address[reg] = (l == 0xffffffff) ? 0 : l;
-			}
+			pci_read_bases(dev, 2);
 			pcibios_read_config_dword(bus->number, devfn, PCI_ROM_ADDRESS1, &l);
 			dev->rom_address = (l == 0xffffffff) ? 0 : l;
 			break;
 		case PCI_HEADER_TYPE_CARDBUS:		    /* CardBus bridge header */
-			if (class >> 16 != PCI_BASE_CLASS_BRIDGE)
+			if (class != PCI_CLASS_BRIDGE_CARDBUS)
 				goto bad;
 			for (reg = 0; reg < 2; reg++) {
 				pcibios_read_config_dword(bus->number, devfn, PCI_CB_MEMORY_BASE_0 + (reg << 3), &l);
@@ -201,8 +260,8 @@ __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 		 * Now insert it into the list of devices held
 		 * by the parent bus.
 		 */
-		dev->sibling = bus->devices;
-		bus->devices = dev;
+		*bus_last = dev;
+		bus_last = &dev->sibling;
 
 #if 0
 		/*
@@ -217,7 +276,7 @@ __initfunc(unsigned int pci_scan_bus(struct pci_bus *bus))
 		/*
 		 * If it's a bridge, scan the bus behind it.
 		 */
-		if (class >> 8 == PCI_CLASS_BRIDGE_PCI) {
+		if (class == PCI_CLASS_BRIDGE_PCI) {
 			unsigned int buses;
 			unsigned short cr;
 

drivers/pci/pcisyms.c

 /*
- *	$Id: pcisyms.c,v 1.4 1998/04/17 16:34:19 mj Exp $
+ *	$Id: pcisyms.c,v 1.7 1998/05/02 19:20:06 mj Exp $
  *
  *	PCI Bus Services -- Exported Symbols
  *
@@ -16,6 +16,12 @@ EXPORT_SYMBOL(pcibios_read_config_dword);
 EXPORT_SYMBOL(pcibios_write_config_byte);
 EXPORT_SYMBOL(pcibios_write_config_word);
 EXPORT_SYMBOL(pcibios_write_config_dword);
+EXPORT_SYMBOL(pci_read_config_byte);
+EXPORT_SYMBOL(pci_read_config_word);
+EXPORT_SYMBOL(pci_read_config_dword);
+EXPORT_SYMBOL(pci_write_config_byte);
+EXPORT_SYMBOL(pci_write_config_word);
+EXPORT_SYMBOL(pci_write_config_dword);
 EXPORT_SYMBOL(pci_devices);
 EXPORT_SYMBOL(pci_root);
 EXPORT_SYMBOL(pci_find_class);

drivers/pci/quirks.c

 /*
- * $Id: quirks.c,v 1.3 1998/02/06 19:51:42 mj Exp $
+ * $Id: quirks.c,v 1.5 1998/05/02 19:24:14 mj Exp $
  *
  * PCI Chipset-Specific Quirks
  *
@@ -7,8 +7,7 @@
  *
  * This is the right place for all special fixups for on-board
  * devices not depending on system architecture -- for example
- * bus bridges. The only thing implemented in this release is
- * the bridge optimization, but others might appear later.
+ * bus bridges.
  */
 
 #include <linux/config.h>
@@ -88,21 +87,19 @@ __initfunc(static void quirk_bridge(struct pci_dev *dev, int pos))
 		printk("    %s: ", bridge_optimization[i].type);
 		bmap = &bridge_mapping[pos + i];
 		if (!bmap->addr) {
-			printk("Not supported.");
+			printk("Not supported.\n");
 		} else {
-			pcibios_read_config_byte(dev->bus->number, dev->devfn, bmap->addr, &val);
+			pci_read_config_byte(dev, bmap->addr, &val);
 			if ((val & bmap->mask) == bmap->value)
-				printk("%s.", bridge_optimization[i].on);
+				printk("%s.\n", bridge_optimization[i].on);
 			else {
-				printk("%s.", bridge_optimization[i].off);
-				pcibios_write_config_byte(dev->bus->number, dev->devfn,
-							  bmap->addr,
-							  (val & (0xff - bmap->mask))
-							  + bmap->value);
-				printk("Changed!  Now %s.", bridge_optimization[i].on);
+				printk("%s", bridge_optimization[i].off);
+				pci_write_config_byte(dev,
+						      bmap->addr,
+						      (val & (0xff - bmap->mask)) + bmap->value);
+				printk(" -> %s.\n", bridge_optimization[i].on);
 			}
 		}
-		printk("\n");
 	}
 }
 
@@ -113,27 +110,18 @@ __initfunc(static void quirk_bridge(struct pci_dev *dev, int pos))
    which can cause problems in combination with the 82441FX/PPro MTRRs */
 __initfunc(static void quirk_passive_release(struct pci_dev *dev, int arg))
 {
-	struct pci_dev *piix3;
+	struct pci_dev *d = NULL;
 	unsigned char dlc;
 
 	/* We have to make sure a particular bit is set in the PIIX3
 	   ISA bridge, so we have to go out and find it. */
-	for (piix3 = pci_devices; ; piix3 = piix3->next) {
-		if (!piix3)
-			return;
-
-		if (piix3->vendor == PCI_VENDOR_ID_INTEL
-		    && piix3->device == PCI_DEVICE_ID_INTEL_82371SB_0)
-			break;
-	}	
-
-	pcibios_read_config_byte(piix3->bus->number, piix3->devfn, 0x82, &dlc);
-
-	if (!(dlc & 1<<1)) {
-		printk("PIIX3: Enabling Passive Release\n");
-		dlc |= 1<<1;
-		pcibios_write_config_byte(piix3->bus->number, piix3->devfn, 
-					  0x82, dlc);
+	while ((d = pci_find_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_0, d))) {
+		pci_read_config_byte(d, 0x82, &dlc);
+		if (!(dlc & 1<<1)) {
+			printk("PIIX3: Enabling Passive Release\n");
+			dlc |= 1<<1;
+			pci_write_config_byte(d, 0x82, dlc);
+		}
 	}
 }
 
@@ -141,7 +129,7 @@ __initfunc(static void quirk_passive_release(struct pci_dev *dev, int arg))
 typedef void (*quirk_handler)(struct pci_dev *, int);
 
 /*
- * Mpping from quirk handler functions to names.
+ * Mapping from quirk handler functions to names.
  */
 
 struct quirk_name {
@@ -185,6 +173,7 @@ static struct quirk_info quirk_list[] __initdata = {
 	{ PCI_VENDOR_ID_UMC,	PCI_DEVICE_ID_UMC_UM8891A,	quirk_bridge,	0x01 },
 	{ PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82424,	quirk_bridge,	0x00 },
 	{ PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82434,	quirk_bridge,	0x00 },
+	{ PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82430,	quirk_bridge,	0x00 },
 #endif
 	{ PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82441,	quirk_passive_release,	0x00 },
 };

drivers/scsi/ide-scsi.c

@@ -260,7 +260,7 @@ static void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
 	struct request *rq = hwgroup->rq;
 	idescsi_pc_t *pc = (idescsi_pc_t *) rq->buffer;
 	int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
-	u8 *scsi_buf = pc->scsi_cmd->request_buffer;
+	u8 *scsi_buf;
 
 	if (rq->cmd != IDESCSI_PC_RQ) {
 		ide_end_request (uptodate, hwgroup);
@@ -282,6 +282,7 @@ static void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup)
 			printk ("ide-scsi: %s: suc %lu", drive->name, pc->scsi_cmd->serial_number);
 			if (!test_bit(PC_WRITING, &pc->flags) && pc->actually_transferred && pc->actually_transferred <= 1024 && pc->buffer) {
 				printk(", rst = ");
+				scsi_buf = pc->scsi_cmd->request_buffer;
 				hexdump(scsi_buf, IDE_MIN(16, pc->scsi_cmd->request_bufflen));
 			} else printk("\n");
 		}
@@ -345,7 +346,18 @@ static void idescsi_pc_intr (ide_drive_t *drive)
 		if ( temp > pc->request_transfer) {
 			if (temp > pc->buffer_size) {
 				printk (KERN_ERR "ide-scsi: The scsi wants to send us more data than expected - discarding data\n");
-				idescsi_discard_data (drive,bcount);
+				temp = pc->buffer_size - pc->actually_transferred;
+				if (temp) {
+					clear_bit(PC_WRITING, &pc->flags);
+					if (pc->sg)
+						idescsi_input_buffers(drive, pc, temp);
+					else
+						atapi_input_bytes(drive, pc->current_position, temp);
+					printk(KERN_ERR "ide-scsi: transferred %d of %d bytes\n", temp, bcount);
+				}
+				pc->actually_transferred += temp;
+				pc->current_position += temp;
+				idescsi_discard_data (drive,bcount - temp);
 				ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc));
 				return;
 			}

drivers/scsi/scsi.c

@@ -1605,6 +1605,7 @@ void scsi_bottom_half_handler(void)
       if( SCpnt == NULL )
           return;
       
+      spin_lock_irqsave(&io_request_lock, flags);
       atomic_inc(&recursion_depth);
       
       SCnext = SCpnt->bh_next;
@@ -1696,6 +1697,7 @@ void scsi_bottom_half_handler(void)
       } /* for(; SCpnt...) */
 
       atomic_dec(&recursion_depth);
+      spin_unlock_irqrestore(&io_request_lock, flags);
 
   } /* while(1==1) */
 

drivers/scsi/scsi_error.c

@@ -159,7 +159,7 @@ scsi_delete_timer(Scsi_Cmnd * SCset)
  *
  * Notes:
  */
-void scsi_times_out (Scsi_Cmnd * SCpnt)
+static void do_scsi_times_out (Scsi_Cmnd * SCpnt)
 {
 
     /* 
@@ -222,6 +222,15 @@ void scsi_times_out (Scsi_Cmnd * SCpnt)
     }
 }
 
+void scsi_times_out (Scsi_Cmnd * SCpnt)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&io_request_lock, flags);
+	do_scsi_times_out(SCpnt);
+	spin_unlock_irqrestore(&io_request_lock, flags);
+}
+
 /*
  * Function     scsi_block_when_processing_errors
  *
@@ -264,6 +273,9 @@ scsi_block_when_processing_errors(Scsi_Device * SDpnt)
 STATIC
 void scsi_eh_times_out (Scsi_Cmnd * SCpnt)
 {
+  unsigned long flags;
+
+  spin_lock_irqsave(&io_request_lock, flags);
   SCpnt->request.rq_status = RQ_SCSI_DONE;
   SCpnt->owner = SCSI_OWNER_ERROR_HANDLER;
   SCpnt->eh_state = SCSI_STATE_TIMEOUT;
@@ -273,7 +285,8 @@ void scsi_eh_times_out (Scsi_Cmnd * SCpnt)
   if (SCpnt->host->eh_action != NULL)
     up(SCpnt->host->eh_action);
   else
-    panic("Missing scsi error handler thread");
+    printk("Missing scsi error handler thread\n");
+  spin_unlock_irqrestore(&io_request_lock, flags);
 }
 
 
@@ -446,6 +459,11 @@ scsi_test_unit_ready(Scsi_Cmnd * SCpnt)
   return SCpnt->eh_state;
 }
 
+/*
+ * This would normally need to get the IO request lock,
+ * but as it doesn't actually touch anything that needs
+ * to be locked we can avoid the lock here..
+ */
 STATIC
 void scsi_sleep_done (struct semaphore * sem)
 {

drivers/scsi/scsi_syms.c

@@ -65,6 +65,7 @@ EXPORT_SYMBOL(scsi_release_command);
 EXPORT_SYMBOL(print_Scsi_Cmnd);
 EXPORT_SYMBOL(scsi_block_when_processing_errors);
 EXPORT_SYMBOL(scsi_mark_host_reset);
+EXPORT_SYMBOL(scsi_ioctl_send_command);
 #if defined(CONFIG_SCSI_LOGGING) /* { */
 EXPORT_SYMBOL(scsi_logging_level);
 #endif

drivers/scsi/sr_ioctl.c

@@ -106,8 +106,8 @@ int sr_do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned bufl
 	    break;
 	case ILLEGAL_REQUEST:
             if (!quiet)
-                printk("sr%d: CDROM (ioctl) reports ILLEGAL REQUEST.\n",
-                       target);
+		printk(KERN_ERR "sr%d: CDROM (ioctl) reports ILLEGAL "
+		       "REQUEST.\n", target);
             if (SCpnt->sense_buffer[12] == 0x20 &&
                 SCpnt->sense_buffer[13] == 0x00) {
                 /* sense: Invalid command operation code */
@@ -121,7 +121,7 @@ int sr_do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned bufl
 #endif
 	    break;
 	default:
-	    printk("sr%d: CDROM (ioctl) error, command: ", target);
+	    printk(KERN_ERR "sr%d: CDROM (ioctl) error, command: ", target);
 	    print_command(sr_cmd);
 	    print_sense("sr", SCpnt);
             err = -EIO;

drivers/sound/sound_syms.c

@@ -26,6 +26,7 @@ EXPORT_SYMBOL(num_audiodevs);
 EXPORT_SYMBOL(note_to_freq);
 EXPORT_SYMBOL(compute_finetune);
 EXPORT_SYMBOL(seq_copy_to_input);
+EXPORT_SYMBOL(seq_input_event);
 EXPORT_SYMBOL(sequencer_init);
 EXPORT_SYMBOL(sequencer_timer);
 
@@ -61,6 +62,7 @@ EXPORT_SYMBOL(conf_printf2);
 EXPORT_SYMBOL(sound_timer_init);
 EXPORT_SYMBOL(sound_timer_interrupt);
 EXPORT_SYMBOL(sound_timer_syncinterval);
+EXPORT_SYMBOL(sound_timer_devs);
 
 /* Locking */
 EXPORT_SYMBOL(sound_locker);

drivers/sound/sscape.c

@@ -970,7 +970,7 @@ void cleanup_module(void)
 	if (mss)
 		unload_ss_ms_sound(&config);
 	SOUND_LOCK_END;
-	unload_sscape(&config);
+	unload_sscape(&mpu_config);
 }
 
 #endif

fs/coda/Makefile

@@ -4,7 +4,7 @@
 
 O_TARGET := coda.o
 O_OBJS   := psdev.o cache.o cnode.o inode.o dir.o file.o upcall.o coda_linux.o\
-            symlink.o pioctl.o sysctl.o
+            symlink.o pioctl.o sysctl.o stats.o
 M_OBJS   := $(O_TARGET)
 
 # If you want debugging output, please uncomment the following line

fs/coda/cache.c

@@ -32,9 +32,6 @@ static void coda_cache_create(struct inode *inode, int mask);
 static struct coda_cache * coda_cache_find(struct inode *inode);
 
 
-/* Keep various stats */
-struct cfsnc_statistics cfsnc_stat;
-
 /* insert a acl-cache entry in sb list */
 static void coda_ccinsert(struct coda_cache *el, struct super_block *sb)
 {
@@ -295,41 +292,3 @@ void coda_flag_inode(struct inode *inode, int flag)
 
 
 
-int
-cfsnc_nc_info(char *buffer, char **start, off_t offset, int length, int dummy)
-{
-        int len=0;
-        off_t begin;
-	
-	/* 	cfsnc_gather_stats(); */
-
-	/* this works as long as we are below 1024 characters! */    
-	len += sprintf(buffer,"Coda minicache statistics\n\n");
-	len += sprintf(buffer+len, "cfsnc_hits : %d\n", cfsnc_stat.hits);
-	len += sprintf(buffer+len, "cfsnc_misses : %d\n", cfsnc_stat.misses);
-	len += sprintf(buffer+len, "cfsnc_enters : %d\n", cfsnc_stat.enters);
-	len += sprintf(buffer+len, "cfsnc_dbl_enters : %d\n", cfsnc_stat.dbl_enters);
-	len += sprintf(buffer+len, "cfsnc_long_name_enters : %d\n", cfsnc_stat.long_name_enters);
-	len += sprintf(buffer+len, "cfsnc_long_name_lookups : %d\n", cfsnc_stat.long_name_lookups);
-	len += sprintf(buffer+len, "cfsnc_long_remove : %d\n", cfsnc_stat.long_remove);
-	len += sprintf(buffer+len, "cfsnc_lru_rm : %d\n", cfsnc_stat.lru_rm);
-	len += sprintf(buffer+len, "cfsnc_zapPfids : %d\n", cfsnc_stat.zapPfids);
-	len += sprintf(buffer+len, "cfsnc_zapFids : %d\n", cfsnc_stat.zapFids);
-	len += sprintf(buffer+len, "cfsnc_zapFile : %d\n", cfsnc_stat.zapFile);
-	len += sprintf(buffer+len, "cfsnc_zapUsers : %d\n", cfsnc_stat.zapUsers);
-	len += sprintf(buffer+len, "cfsnc_Flushes : %d\n", cfsnc_stat.Flushes);
-	len += sprintf(buffer+len, "cfsnc_SumLen : %d\n", cfsnc_stat.Sum_bucket_len);
-	len += sprintf(buffer+len, "cfsnc_Sum2Len : %d\n", cfsnc_stat.Sum2_bucket_len);
-	len += sprintf(buffer+len,  "cfsnc_# 0 len : %d\n", cfsnc_stat.Num_zero_len);
-	len += sprintf(buffer+len,  "cfsnc_MaxLen : %d\n", cfsnc_stat.Max_bucket_len);
-	len += sprintf(buffer+len,  "cfsnc_SearchLen : %d\n", cfsnc_stat.Search_len);
-       	begin =  offset;
-       	*start = buffer + begin;
-       	len -= begin;
-	
-        if(len>length)
-                len = length;
-	if (len< 0)
-		len = 0;
-        return len;
-} 

fs/coda/coda_linux.c

@@ -7,6 +7,7 @@
  * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
  */
 
+#include <linux/version.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>

fs/coda/dir.c

@@ -23,6 +23,7 @@
 #include <linux/coda_psdev.h>
 #include <linux/coda_fs_i.h>
 #include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
 
 /* dir inode-ops */
 static int coda_create(struct inode *dir, struct dentry *new, int mode);
@@ -179,6 +180,8 @@ int coda_permission(struct inode *inode, int mask)
         int error;
  
         ENTRY;
+	coda_vfs_stat.permission++;
+	coda_permission_stat.count++;
 
         if ( mask == 0 ) {
                 EXIT;
@@ -187,6 +190,7 @@ int coda_permission(struct inode *inode, int mask)
 
 	if ( coda_access_cache == 1 ) {
 		if ( coda_cache_check(inode, mask) ) {
+			coda_permission_stat.hit_count++;
 			return 0; 
 		}
 	}
@@ -221,6 +225,8 @@ static int coda_create(struct inode *dir, struct dentry *de, int mode)
 	struct ViceFid newfid;
 	struct coda_vattr attrs;
 
+	coda_vfs_stat.create++;
+
 	CDEBUG(D_INODE, "name: %s, length %d, mode %o\n",name, length, mode);
 
         if (!dir || !S_ISDIR(dir->i_mode)) {
@@ -274,6 +280,8 @@ static int coda_mkdir(struct inode *dir, struct dentry *de, int mode)
 	struct ViceFid newfid;
 
 
+	coda_vfs_stat.mkdir++;
+
 	if (!dir || !S_ISDIR(dir->i_mode)) {
 		printk("coda_mkdir: inode is NULL or not a directory\n");
 		return -ENOENT;
@@ -329,6 +337,7 @@ static int coda_link(struct dentry *source_de, struct inode *dir_inode,
 	int error;
 
         ENTRY;
+	coda_vfs_stat.link++;
 
 	if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
 		return -EPERM;
@@ -373,6 +382,7 @@ static int coda_symlink(struct inode *dir_inode, struct dentry *de,
         int error=0;
         
         ENTRY;
+	coda_vfs_stat.symlink++;
 
 	if (coda_isroot(dir_inode) && coda_iscontrol(name, len))
 		return -EPERM;
@@ -414,6 +424,7 @@ int coda_unlink(struct inode *dir, struct dentry *de)
 	int len = de->d_name.len;
 
 	ENTRY;
+	coda_vfs_stat.unlink++;
 
         dircnp = ITOC(dir);
         CHECK_CNODE(dircnp);
@@ -446,6 +457,8 @@ int coda_rmdir(struct inode *dir, struct dentry *de)
 	int len = de->d_name.len;
         int error, rehash = 0;
 
+	coda_vfs_stat.rmdir++;
+
 	if (!dir || !S_ISDIR(dir->i_mode)) {
 		printk("coda_rmdir: inode is NULL or not a directory\n");
 		return -ENOENT;
@@ -502,6 +515,8 @@ static int coda_rename(struct inode *old_dir, struct dentry *old_dentry,
         struct coda_inode_info *new_cnp, *old_cnp;
         int error, rehash = 0, update = 1;
 ENTRY;
+	coda_vfs_stat.rename++;
+
         old_cnp = ITOC(old_dir);
         CHECK_CNODE(old_cnp);
         new_cnp = ITOC(new_dir);
@@ -565,6 +580,7 @@ int coda_readdir(struct file *file, void *dirent,  filldir_t filldir)
 	struct inode *inode=file->f_dentry->d_inode;
 
         ENTRY;
+	coda_vfs_stat.readdir++;
 
         if (!inode || !inode->i_sb || !S_ISDIR(inode->i_mode)) {
                 printk("coda_readdir: inode is NULL or not a directory\n");
@@ -606,6 +622,7 @@ int coda_open(struct inode *i, struct file *f)
 	unsigned short coda_flags = coda_flags_to_cflags(flags);
 
         ENTRY;
+	coda_vfs_stat.open++;
         
         CDEBUG(D_SPECIAL, "OPEN inode number: %ld, flags %o.\n", 
 	       f->f_dentry->d_inode->i_ino, flags);
@@ -659,6 +676,7 @@ int coda_release(struct inode *i, struct file *f)
 	unsigned short cflags = coda_flags_to_cflags(flags);
 
         ENTRY;
+	coda_vfs_stat.release++;
 
         cnp =ITOC(i);
         CHECK_CNODE(cnp);

fs/coda/file.c

@@ -23,6 +23,7 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 #include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
 
 /* file operations */
 static int coda_readpage(struct file *file, struct page * page);
@@ -83,6 +84,7 @@ static int coda_readpage(struct file * coda_file, struct page * page)
         struct coda_inode_info *cii;
 
         ENTRY;
+	coda_vfs_stat.readpage++;
         
         cii = ITOC(coda_inode);
 
@@ -108,6 +110,8 @@ static int coda_file_mmap(struct file * file, struct vm_area_struct * vma)
         struct coda_inode_info *cii;
 	int res;
 
+	coda_vfs_stat.file_mmap++;
+
         ENTRY;
 	cii = ITOC(file->f_dentry->d_inode);
 	cii->c_mmcount++;
@@ -126,7 +130,9 @@ static ssize_t coda_file_read(struct file *coda_file, char *buff,
         struct file  cont_file;
 	struct dentry cont_dentry;
         int result = 0;
-        ENTRY;
+
+	ENTRY;
+	coda_vfs_stat.file_read++;
 
         cnp = ITOC(coda_inode);
         CHECK_CNODE(cnp);
@@ -167,6 +173,7 @@ static ssize_t coda_file_write(struct file *coda_file, const char *buff,
         int result = 0;
 
         ENTRY;
+	coda_vfs_stat.file_write++;
 
         cnp = ITOC(coda_inode);
         CHECK_CNODE(cnp);
@@ -205,6 +212,7 @@ int coda_fsync(struct file *coda_file, struct dentry *coda_dentry)
 	struct dentry cont_dentry;
         int result = 0;
         ENTRY;
+	coda_vfs_stat.fsync++;
 
 	if (!(S_ISREG(coda_inode->i_mode) || S_ISDIR(coda_inode->i_mode) ||
 	      S_ISLNK(coda_inode->i_mode)))

fs/coda/psdev.c

@@ -44,7 +44,7 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 #include <linux/coda_cache.h>
-#include <linux/coda_sysctl.h>
+#include <linux/coda_proc.h>
 
 
 /*
@@ -401,19 +401,106 @@ static struct file_operations coda_psdev_fops = {
 
 #ifdef CONFIG_PROC_FS
 
-struct proc_dir_entry proc_coda = {
+struct proc_dir_entry proc_sys_root = {
+        PROC_SYS, 3, "sys",                     /* inode, name */
+        S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,   /* mode, nlink, uid, gid */
+        0, &proc_dir_inode_operations,          /* size, ops */
+        NULL, NULL,                             /* get_info, fill_inode */
+        NULL,                                   /* next */
+        NULL, NULL                              /* parent, subdir */
+};
+
+struct proc_dir_entry proc_fs_coda = {
+        PROC_FS_CODA, 4, "coda",
+        S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,
+        0, &proc_dir_inode_operations,
+	NULL, NULL,
+	NULL,
+	NULL, NULL
+};
+
+struct proc_dir_entry proc_sys_coda = {
         0, 4, "coda",
-        S_IFDIR | S_IRUGO | S_IXUGO | S_IWUSR, 2, 0, 0,
-        0, &proc_net_inode_operations,
+        S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,
+        0, &proc_dir_inode_operations,
+	NULL, NULL,
+	NULL,
+	NULL, NULL
+};
 
+struct proc_dir_entry proc_fs = {
+        PROC_FS, 2, "fs",
+        S_IFDIR | S_IRUGO | S_IXUGO, 2, 0, 0,
+        0, &proc_dir_inode_operations,
+	NULL, NULL,
+	NULL,
+	NULL, NULL
 };
 
+#if 0
 struct proc_dir_entry proc_coda_ncstats =  {
                 0 , 12, "coda-ncstats",
                 S_IFREG | S_IRUGO, 1, 0, 0,
                 0, &proc_net_inode_operations,
                 cfsnc_nc_info
         };
+#endif
+
+struct proc_dir_entry proc_coda_vfs =  {
+                PROC_VFS_STATS , 9, "vfs_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_vfs_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_vfs_control =  {
+                0 , 9, "vfs_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_vfs_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_upcall =  {
+                PROC_UPCALL_STATS , 12, "upcall_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_upcall_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_upcall_control =  {
+                0 , 12, "upcall_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_upcall_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_permission =  {
+                PROC_PERMISSION_STATS , 16, "permission_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_permission_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_permission_control =  {
+                0 , 16, "permission_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_permission_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_cache_inv =  {
+                PROC_CACHE_INV_STATS , 15, "cache_inv_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_cache_inv_stats_get_info
+        };
+
+struct proc_dir_entry proc_coda_cache_inv_control =  {
+                0 , 15, "cache_inv_stats",
+                S_IFREG | S_IRUGO, 1, 0, 0,
+                0, &proc_net_inode_operations,
+                coda_cache_inv_stats_get_info
+        };
 
 #endif
 
@@ -429,9 +516,27 @@ int init_coda_psdev(void)
 	memset(coda_super_info, 0, sizeof(coda_super_info));
 	memset(&coda_callstats, 0, sizeof(coda_callstats));
 
+	reset_coda_vfs_stats();
+	reset_coda_upcall_stats();
+	reset_coda_permission_stats();
+	reset_coda_cache_inv_stats();
+
 #ifdef CONFIG_PROC_FS
-	proc_register(&proc_root,&proc_coda);
-	proc_register(&proc_coda, &proc_coda_ncstats);
+	proc_register(&proc_root,&proc_fs);
+	proc_register(&proc_fs,&proc_fs_coda);
+	proc_register(&proc_fs_coda,&proc_coda_vfs);
+	proc_register(&proc_fs_coda,&proc_coda_upcall);
+	proc_register(&proc_fs_coda,&proc_coda_permission);
+	proc_register(&proc_fs_coda,&proc_coda_cache_inv);
+#if 0
+	proc_register(&proc_fs_coda, &proc_coda_ncstats);
+#endif
+	proc_register(&proc_sys_root,&proc_sys_coda);
+	proc_register(&proc_sys_coda,&proc_coda_vfs_control);
+	proc_register(&proc_sys_coda,&proc_coda_upcall_control);
+	proc_register(&proc_sys_coda,&proc_coda_permission_control);
+	proc_register(&proc_sys_coda,&proc_coda_cache_inv_control);
+
 	coda_sysctl_init();
 #endif 
 	return 0;
@@ -476,8 +581,22 @@ void cleanup_module(void)
 
 #if CONFIG_PROC_FS
         coda_sysctl_clean();
-        proc_unregister(&proc_coda, proc_coda_ncstats.low_ino);
-	proc_unregister(&proc_root, proc_coda.low_ino);
+
+        proc_unregister(&proc_sys_coda, proc_coda_cache_inv_control.low_ino);
+        proc_unregister(&proc_sys_coda, proc_coda_permission_control.low_ino);
+        proc_unregister(&proc_sys_coda, proc_coda_upcall_control.low_ino);
+	proc_unregister(&proc_sys_coda,proc_coda_vfs_control.low_ino);
+	proc_unregister(&proc_sys_root, proc_sys_coda.low_ino);
+
+#if 0
+	proc_unregister(&proc_fs_coda, proc_coda_ncstats.low_ino);
+#endif
+        proc_unregister(&proc_fs_coda, proc_coda_cache_inv.low_ino);
+        proc_unregister(&proc_fs_coda, proc_coda_permission.low_ino);
+        proc_unregister(&proc_fs_coda, proc_coda_upcall.low_ino);
+        proc_unregister(&proc_fs_coda, proc_coda_vfs.low_ino);
+	proc_unregister(&proc_fs, proc_fs_coda.low_ino);
+	proc_unregister(&proc_root, proc_fs.low_ino);
 #endif 
 }
 

fs/coda/stats.c

+/*
+ * stats.c
+ * 
+ * CODA operation statistics
+ *
+ * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/swapctl.h>
+#include <linux/proc_fs.h>
+#include <linux/malloc.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <asm/bitops.h>
+#include <asm/segment.h>
+#include <asm/uaccess.h>
+#include <linux/utsname.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_psdev.h>
+#include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
+
+struct coda_vfs_stats		coda_vfs_stat;
+struct coda_permission_stats	coda_permission_stat;
+struct coda_cache_inv_stats	coda_cache_inv_stat;
+struct coda_upcall_stats_entry coda_upcall_stat[CFS_NCALLS];
+
+/* keep this in sync with coda.h! */
+char *coda_upcall_names[] = {
+	"totals      ",   /*  0 */
+	"noop        ",   /*  1 */
+	"root        ",   /*  2 */
+	"sync        ",   /*  3 */
+	"open        ",   /*  4 */
+	"close       ",   /*  5 */
+	"ioctl       ",   /*  6 */
+	"getattr     ",   /*  7 */
+	"setattr     ",   /*  8 */
+	"access      ",   /*  9 */
+	"lookup      ",   /* 10 */
+	"create      ",   /* 11 */
+	"remove      ",   /* 12 */
+	"link        ",   /* 13 */
+	"rename      ",   /* 14 */
+	"mkdir       ",   /* 15 */
+	"rmdir       ",   /* 16 */
+	"readdir     ",   /* 17 */
+	"symlink     ",   /* 18 */
+	"readlink    ",   /* 19 */
+	"fsync       ",   /* 20 */
+	"inactive    ",   /* 21 */
+	"vget        ",   /* 22 */
+	"signal      ",   /* 23 */
+	"replace     ",   /* 24 */
+	"flush       ",   /* 25 */
+	"purgeuser   ",   /* 26 */
+	"zapfile     ",   /* 27 */
+	"zapdir      ",   /* 28 */
+	"zapvnode    ",   /* 28 */
+	"purgefid    ",   /* 30 */
+	"open_by_path"    /* 31 */
+};
+
+
+
+
+void reset_coda_vfs_stats( void )
+{
+	memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
+}
+
+#if 0
+static void reset_upcall_entry( struct coda_upcall_stats_entry * pentry )
+{
+	pentry->count = 0;
+	pentry->time_sum = pentry->time_squared_sum = 0;
+}
+#endif
+
+void reset_coda_upcall_stats( void )
+{
+	memset( &coda_upcall_stat, 0, sizeof( coda_upcall_stat ) );
+}
+
+void reset_coda_permission_stats( void )
+{
+	memset( &coda_permission_stat, 0, sizeof( coda_permission_stat ) );
+}
+
+void reset_coda_cache_inv_stats( void )
+{
+	memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
+}
+
+
+void do_time_stats( struct coda_upcall_stats_entry * pentry, 
+		    unsigned long runtime )
+{
+	
+	unsigned long time = runtime * 1000 /HZ;	/* time in ms */
+	CDEBUG(D_SPECIAL, "time: %ld\n", time);
+
+	if ( pentry->count == 0 ) {
+		pentry->time_sum = pentry->time_squared_sum = 0;
+	}
+	
+	pentry->count++;
+	pentry->time_sum += time;
+	pentry->time_squared_sum += time*time;
+}
+
+
+
+void coda_upcall_stats(int opcode, long unsigned runtime) 
+{
+	struct coda_upcall_stats_entry * pentry;
+	
+	if ( opcode < 0 || opcode > CFS_NCALLS - 1) {
+		printk("Nasty opcode %d passed to coda_upcall_stats\n",
+		       opcode);
+		return;
+	}
+		
+	pentry = &coda_upcall_stat[opcode];
+	do_time_stats(pentry, runtime);
+
+        /* fill in the totals */
+	pentry = &coda_upcall_stat[0];
+	do_time_stats(pentry, runtime);
+
+}
+
+unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry )
+{
+	return ( pentry->count == 0 ) ? 0 : pentry->time_sum / pentry->count;
+}
+
+static inline unsigned long absolute( unsigned long x )
+{
+	return x >= 0 ? x : -x;
+}
+
+static unsigned long sqr_root( unsigned long x )
+{
+	unsigned long y = x, r;
+	int n_bit = 0;
+  
+	if ( x == 0 )
+		return 0;
+	if ( x < 0)
+		x = -x;
+
+	while ( y ) {
+		y >>= 1;
+		n_bit++;
+	}
+  
+	r = 1 << (n_bit/2);
+  
+	while ( 1 ) {
+		r = (r + x/r)/2;
+		if ( r*r <= x && x < (r+1)*(r+1) )
+			break;
+	}
+  
+	return r;
+}
+
+unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry )
+{
+	unsigned long time_avg;
+  
+	if ( pentry->count <= 1 )
+		return 0;
+  
+	time_avg = get_time_average( pentry );
+	return 
+	        sqr_root( (pentry->time_squared_sum / pentry->count) - 
+			    time_avg * time_avg );
+}
+
+int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
+			     void * buffer, size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_vfs_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_upcall_stats( ctl_table * table, int write, 
+				struct file * filp, void * buffer, 
+				size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_upcall_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_permission_stats( ctl_table * table, int write, 
+				    struct file * filp, void * buffer, 
+				    size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_permission_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_cache_inv_stats( ctl_table * table, int write, 
+				   struct file * filp, void * buffer, 
+				   size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_cache_inv_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
+			     int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_vfs_stats * ps = & coda_vfs_stat;
+  
+  /* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda VFS statistics\n"
+			"===================\n\n"
+			"File Operations:\n"
+			"\tfile_read\t%9d\n"
+			"\tfile_write\t%9d\n"
+			"\tfile_mmap\t%9d\n"
+			"\topen\t\t%9d\n"
+			"\trelase\t\t%9d\n"
+			"\tfsync\t\t%9d\n\n"
+			"Dir Operations:\n"
+			"\treaddir\t\t%9d\n\n"
+			"Inode Operations\n"
+			"\tcreate\t\t%9d\n"
+			"\tlookup\t\t%9d\n"
+			"\tlink\t\t%9d\n"
+			"\tunlink\t\t%9d\n"
+			"\tsymlink\t\t%9d\n"
+			"\tmkdir\t\t%9d\n"
+			"\trmdir\t\t%9d\n"
+			"\trename\t\t%9d\n"
+			"\tpermission\t%9d\n"
+			"\treadpage\t%9d\n",
+
+			/* file operations */
+			ps->file_read,
+			ps->file_write,
+			ps->file_mmap,
+			ps->open,
+			ps->release,
+			ps->fsync,
+
+			/* dir operations */
+			ps->readdir,
+		  
+			/* inode operations */
+			ps->create,
+			ps->lookup,
+			ps->link,
+			ps->unlink,
+			ps->symlink,
+			ps->mkdir,
+			ps->rmdir,
+			ps->rename,
+			ps->permission,
+			ps->readpage );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
+				int length, int dummy )
+{
+	int len=0;
+	int i;
+	off_t begin;
+	off_t pos = 0;
+	char tmpbuf[80];
+	int tmplen = 0;
+
+	ENTRY;
+	/* this works as long as we are below 1024 characters! */
+	if ( offset < 80 ) 
+		len += sprintf( buffer,"%-79s\n",	"Coda upcall statistics");
+	if ( offset < 160) 
+		len += sprintf( buffer + len,"%-79s\n",	"======================");
+	if ( offset < 240) 
+		len += sprintf( buffer + len,"%-79s\n",	"upcall\t\t    count\tavg time(ms)\tstd deviation(ms)");
+	if ( offset < 320) 
+		len += sprintf( buffer + len,"%-79s\n",	"------\t\t    -----\t------------\t-----------------");
+	pos = 320; 
+	for ( i = 0 ; i < CFS_NCALLS ; i++ ) {
+		tmplen += sprintf(tmpbuf,"%s\t%9d\t%10ld\t%10ld", 
+				  coda_upcall_names[i],
+				  coda_upcall_stat[i].count, 
+				  get_time_average(&coda_upcall_stat[i]),
+				  coda_upcall_stat[i].time_squared_sum);
+		pos += 80;
+		if ( pos < offset ) 
+			continue; 
+		len += sprintf(buffer + len, "%-79s\n", tmpbuf);
+		if ( len >= length ) 
+			break; 
+	}
+  
+	begin = len- (pos - offset);
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+	EXIT;
+	return len;
+}
+
+int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
+				    int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_permission_stats * ps = & coda_permission_stat;
+  
+	/* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda permission statistics\n"
+			"==========================\n\n"
+			"count\t\t%9d\n"
+			"hit count\t%9d\n",
+
+			ps->count,
+			ps->hit_count );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
+				   int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
+  
+	/* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda cache invalidation statistics\n"
+			"==================================\n\n"
+			"flush\t\t%9d\n"
+			"purge user\t%9d\n"
+			"zap_dir\t\t%9d\n"
+			"zap_file\t%9d\n"
+			"zap_vnode\t%9d\n"
+			"purge_fid\t%9d\n"
+			"replace\t\t%9d\n",
+			ps->flush,
+			ps->purge_user,
+			ps->zap_dir,
+			ps->zap_file,
+			ps->zap_vnode,
+			ps->purge_fid,
+			ps->replace );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+

fs/coda/symlink.c

@@ -23,6 +23,7 @@
 #include <linux/coda_psdev.h>
 #include <linux/coda_fs_i.h>
 #include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
 
 static int coda_readlink(struct dentry *de, char *buffer, int length);
 static struct dentry *coda_follow_link(struct dentry *, struct dentry *);
@@ -60,7 +61,7 @@ static int coda_readlink(struct dentry *de, char *buffer, int length)
         ENTRY;
 
         cp = ITOC(inode);
-        CHECK_CNODE(cp);
+	coda_vfs_stat.readlink++;
 
         /* the maximum length we receive is len */
         if ( length > CFS_MAXPATHLEN ) 
@@ -93,11 +94,11 @@ static struct dentry *coda_follow_link(struct dentry *de,
 	unsigned int len;
 	char mem[CFS_MAXPATHLEN];
 	char *path;
-ENTRY;
+	ENTRY;
 	CDEBUG(D_INODE, "(%x/%ld)\n", inode->i_dev, inode->i_ino);
 	
         cnp = ITOC(inode);
-        CHECK_CNODE(cnp);
+	coda_vfs_stat.follow_link++;
 
 	len = CFS_MAXPATHLEN;
 	error = venus_readlink(inode->i_sb, &(cnp->c_fid), mem, &len);

fs/coda/sysctl.c

@@ -26,7 +26,7 @@
 #include <linux/coda_fs_i.h>
 #include <linux/coda_psdev.h>
 #include <linux/coda_cache.h>
-#include <linux/coda_sysctl.h>
+#include <linux/coda_proc.h>
 extern int coda_debug;
 /* extern int cfsnc_use; */
 extern int coda_print_entry;
@@ -47,6 +47,10 @@ struct ctl_table_header *fs_table_header, *coda_table_header;
 #define CODA_TIMEOUT    3       /* timeout on upcalls to become intrble */
 #define CODA_MC         4       /* use/do not use the access cache */
 #define CODA_HARD       5       /* mount type "hard" or "soft" */
+#define CODA_VFS 	 6       /* vfs statistics */
+#define CODA_UPCALL 	 7       /* upcall statistics */
+#define CODA_PERMISSION	 8       /* permission statistics */
+#define CODA_CACHE_INV 	 9       /* cache invalidation statistics */
 
 
 
@@ -56,6 +60,10 @@ static ctl_table coda_table[] = {
  	{CODA_MC, "accesscache", &coda_access_cache, sizeof(int), 0644, NULL, &coda_dointvec}, 
  	{CODA_TIMEOUT, "timeout", &coda_timeout, sizeof(int), 0644, NULL, &coda_dointvec},
  	{CODA_HARD, "hard", &coda_hard, sizeof(int), 0644, NULL, &coda_dointvec},
+ 	{CODA_VFS, "vfs_stats", NULL, 0, 0644, NULL, &do_reset_coda_vfs_stats},
+ 	{CODA_UPCALL, "upcall_stats", NULL, 0, 0644, NULL, &do_reset_coda_upcall_stats},
+ 	{CODA_PERMISSION, "permission_stats", NULL, 0, 0644, NULL, &do_reset_coda_permission_stats},
+ 	{CODA_CACHE_INV, "cache_inv_stats", NULL, 0, 0644, NULL, &do_reset_coda_cache_inv_stats},
 	{ 0 }
 };
 

fs/coda/upcall.c

@@ -37,6 +37,11 @@
 #include <linux/coda_psdev.h>
 #include <linux/coda_fs_i.h>
 #include <linux/coda_cache.h>
+#include <linux/coda_proc.h> 
+
+
+static int  coda_upcall(struct coda_sb_info *mntinfo, int inSize, int *outSize, 
+		       union inputArgs *buffer);
 
 #define UPARG(op)\
 do {\
@@ -68,10 +73,11 @@ int venus_rootfid(struct super_block *sb, ViceFid *fidp)
         union inputArgs *inp;
         union outputArgs *outp;
         int insize, outsize, error;
-ENTRY;
+	ENTRY;
 
         insize = SIZE(root);
         UPARG(CFS_ROOT);
+
 	error = coda_upcall(coda_sbp(sb), insize, &outsize, inp);
 	
 	if (error) {
@@ -92,7 +98,7 @@ int venus_getattr(struct super_block *sb, struct ViceFid *fid,
 {
         union inputArgs *inp;
         union outputArgs *outp;
-        int insize, outsize, error;
+	        int insize, outsize, error;
 ENTRY;
         insize = SIZE(getattr); 
 	UPARG(CFS_GETATTR);
@@ -458,8 +464,8 @@ int venus_symlink(struct super_block *sb, struct ViceFid *fid,
 int venus_fsync(struct super_block *sb, struct ViceFid *fid)
 {
         union inputArgs *inp;
-        union outputArgs *outp;
-        int insize, outsize, error;
+        union outputArgs *outp; 
+	int insize, outsize, error;
 	
 	insize=SIZE(fsync);
 	UPARG(CFS_FSYNC);
@@ -476,8 +482,8 @@ int venus_fsync(struct super_block *sb, struct ViceFid *fid)
 int venus_access(struct super_block *sb, struct ViceFid *fid, int mask)
 {
         union inputArgs *inp;
-        union outputArgs *outp;
-        int insize, outsize, error;
+        union outputArgs *outp; 
+	int insize, outsize, error;
 
 	insize = SIZE(access);
 	UPARG(CFS_ACCESS);
@@ -497,8 +503,8 @@ int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
 		 unsigned int cmd, struct PioctlData *data)
 {
         union inputArgs *inp;
-        union outputArgs *outp;
-        int insize, outsize, error;
+        union outputArgs *outp;  
+	int insize, outsize, error;
 	int iocsize;
 
 	insize = VC_MAXMSGSIZE;
@@ -583,11 +589,13 @@ int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
  * reply and return Venus' error, also POSITIVE. 
  * 
  */
-static inline void coda_waitfor_upcall(struct vmsg *vmp)
+static inline unsigned long coda_waitfor_upcall(struct vmsg *vmp)
 {
 	struct wait_queue	wait = { current, NULL };
+	unsigned long posttime;
 
 	vmp->vm_posttime = jiffies;
+	posttime = jiffies;
 
 	add_wait_queue(&vmp->vm_sleep, &wait);
 	for (;;) {
@@ -616,13 +624,17 @@ static inline void coda_waitfor_upcall(struct vmsg *vmp)
 	remove_wait_queue(&vmp->vm_sleep, &wait);
 	current->state = TASK_RUNNING;
 
-	return;
+	CDEBUG(D_SPECIAL, "posttime: %ld, returned: %ld\n", posttime, jiffies-posttime);
+	return 	(jiffies - posttime);
+
 }
 
 
-int coda_upcall(struct coda_sb_info *sbi, int inSize, int *outSize, 
+static int coda_upcall(struct coda_sb_info *sbi, 
+		int inSize, int *outSize, 
 		union inputArgs *buffer) 
 {
+	unsigned long runtime; 
 	struct vcomm *vcommp;
 	union outputArgs *out;
 	struct vmsg *vmp;
@@ -635,7 +647,6 @@ ENTRY;
 	}
 	vcommp = sbi->sbi_vcomm;
 
-	clstats(((union inputArgs *)buffer)->ih.opcode);
 
 	if (!vcomm_open(vcommp))
                 return(ENODEV);
@@ -670,7 +681,8 @@ ENTRY;
 	 * ENODEV.  */
 
 	/* Go to sleep.  Wake up on signals only after the timeout. */
-	coda_waitfor_upcall(vmp);
+	runtime = coda_waitfor_upcall(vmp);
+	coda_upcall_stats(((union inputArgs *)buffer)->ih.opcode, runtime);
 
 	CDEBUG(D_TIMING, "opc: %d time: %ld uniq: %d size: %d\n",
 	       vmp->vm_opcode, jiffies - vmp->vm_posttime, 

include/asm-alpha/mmu_context.h

@@ -109,7 +109,11 @@ extern inline void get_mmu_context(struct task_struct *p)
 #endif
 }
 
-#define init_new_context(mm)	do { } while(0)
+extern inline void init_new_context(struct mm_struct *mm)
+{
+	mm->context = 0;
+}
+
 #define destroy_context(mm)	do { } while(0)
 
 #endif

include/linux/coda_proc.h

+/*
+ * coda_statis.h
+ * 
+ * CODA operation statistics
+ *
+ * (c) March, 1998
+ * by Michihiro Kuramochi, Zhenyu Xia and Zhanyong Wan
+ * zhanyong.wan@yale.edu
+ *
+ */
+
+#ifndef _CODA_PROC_H
+#define _CODA_PROC_H
+
+void coda_sysctl_init(void);
+void coda_sysctl_clean(void);
+void coda_upcall_stats(int opcode, unsigned long jiffies);
+
+#include <linux/sysctl.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda.h>
+
+/* these four files are presented to show the result of the statistics:
+ *
+ *	/proc/fs/coda/vfs_stats
+ *		      upcall_stats
+ *		      permission_stats
+ *		      cache_inv_stats
+ *
+ * these four files are presented to reset the statistics to 0:
+ *
+ *	/proc/sys/coda/vfs_stats
+ *		       upcall_stats
+ *		       permission_stats
+ *		       cache_inv_stats
+ */
+
+/* VFS operation statistics */
+struct coda_vfs_stats 
+{
+	/* file operations */
+	int file_read;
+	int file_write;
+	int file_mmap;
+	int open;
+	int release;
+	int fsync;
+
+	/* dir operations */
+	int readdir;
+  
+	/* inode operations */
+	int create;
+	int lookup;
+	int link;
+	int unlink;
+	int symlink;
+	int mkdir;
+	int rmdir;
+	int rename;
+	int permission;
+	int readpage;
+
+	/* symlink operatoins*/
+	int follow_link;
+	int readlink;
+};
+
+struct coda_upcall_stats_entry 
+{
+  int count;
+  unsigned long time_sum;
+  unsigned long time_squared_sum;
+};
+
+
+
+/* cache hits for permissions statistics */
+struct coda_permission_stats 
+{
+	int count;
+	int hit_count;
+};
+
+/* cache invalidation statistics */
+struct coda_cache_inv_stats
+{
+	int flush;
+	int purge_user;
+	int zap_dir;
+	int zap_file;
+	int zap_vnode;
+	int purge_fid;
+	int replace;
+};
+
+/* these global variables hold the actual statistics data */
+extern struct coda_vfs_stats		coda_vfs_stat;
+extern struct coda_permission_stats	coda_permission_stat;
+extern struct coda_cache_inv_stats	coda_cache_inv_stat;
+
+/* reset statistics to 0 */
+void reset_coda_vfs_stats( void );
+void reset_coda_upcall_stats( void );
+void reset_coda_permission_stats( void );
+void reset_coda_cache_inv_stats( void );
+
+/* some utitlities to make it easier for you to do statistics for time */
+void do_time_stats( struct coda_upcall_stats_entry * pentry, 
+		    unsigned long jiffy );
+/*
+double get_time_average( const struct coda_upcall_stats_entry * pentry );
+double get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
+*/
+unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry );
+unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry );
+
+/* like coda_dointvec, these functions are to be registered in the ctl_table
+ * data structure for /proc/sys/... files 
+ */
+int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
+			     void * buffer, size_t * lenp );
+int do_reset_coda_upcall_stats( ctl_table * table, int write, 
+				struct file * filp, void * buffer, 
+				size_t * lenp );
+int do_reset_coda_permission_stats( ctl_table * table, int write, 
+				    struct file * filp, void * buffer, 
+				    size_t * lenp );
+int do_reset_coda_cache_inv_stats( ctl_table * table, int write, 
+				   struct file * filp, void * buffer, 
+				   size_t * lenp );
+
+/* these functions are called to form the content of /proc/fs/coda/... files */
+int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
+			     int length, int dummy );
+int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
+				int length, int dummy );
+int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
+				    int length, int dummy );
+int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
+				   int length, int dummy );
+
+
+#endif /* _CODA_PROC_H */

include/linux/coda_psdev.h

@@ -94,8 +94,6 @@ int venus_access(struct super_block *sb, struct ViceFid *fid, int mask);
 int venus_pioctl(struct super_block *sb, struct ViceFid *fid,
 		 unsigned int cmd, struct PioctlData *data);
 int coda_downcall(int opcode, union outputArgs *out, struct super_block *sb);
-int coda_upcall(struct coda_sb_info *mntinfo, int inSize, 
-		int *outSize, union inputArgs *buffer);
 int venus_fsync(struct super_block *sb, struct ViceFid *fid);
 
 

include/linux/coda_sysctl.h

-/*
- * Sysctl operations for Coda.
- * Original version: (C) 1996 Peter Braam 
- * Rewritten for Linux 2.1: (C) 1997 Carnegie Mellon University
- *
- * Carnegie Mellon encourages users of this code to contribute improvements
- * to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
- */
-void coda_sysctl_init(void);
-void coda_sysctl_clean(void);

include/linux/dcache.h

@@ -131,7 +131,7 @@ extern int d_invalidate(struct dentry *);
 
 /* dcache memory management */
 extern int  select_dcache(int, int);
-extern void shrink_dcache_memory(void);
+extern void shrink_dcache_memory(int, unsigned int);
 extern void check_dcache_memory(void);
 extern void free_inode_memory(int);	/* defined in fs/inode.c */
 

include/linux/proc_fs.h

@@ -51,6 +51,7 @@ enum root_directory_inos {
 	PROC_PPC_HTAB,
 	PROC_SOUND,
 	PROC_MTRR, /* whether enabled or not */
+	PROC_FS
 };
 
 enum pid_directory_inos {
@@ -205,6 +206,19 @@ enum bus_directory_inos {
 	PROC_BUS_LAST
 };
 
+enum fs_directory_inos {
+	PROC_FS_CODA = PROC_MCA_LAST,
+	PROC_FS_LAST
+};
+
+enum fs_coda_directory_inos {
+	PROC_VFS_STATS = PROC_MCA_LAST,
+	PROC_UPCALL_STATS,
+	PROC_PERMISSION_STATS,
+	PROC_CACHE_INV_STATS,
+	PROC_CODA_FS_LAST
+};
+
 /* Finally, the dynamically allocatable proc entries are reserved: */
 
 #define PROC_DYNAMIC_FIRST 4096

include/linux/swapctl.h

@@ -50,6 +50,15 @@ typedef struct freepages_v1
 typedef freepages_v1 freepages_t;
 extern freepages_t freepages;
 
+typedef struct pager_daemon_v1
+{
+	unsigned int	tries_base;
+	unsigned int	tries_min;
+	unsigned int	swap_cluster;
+} pager_daemon_v1;
+typedef pager_daemon_v1 pager_daemon_t;
+extern pager_daemon_t pager_daemon;
+
 #define SC_VERSION	1
 #define SC_MAX_VERSION	1
 

include/linux/sysctl.h

@@ -84,7 +84,8 @@ enum
 	VM_BDFLUSH,		/* struct: Control buffer cache flushing */
 	VM_OVERCOMMIT_MEMORY,	/* Turn off the virtual memory safety limit */
 	VM_BUFFERMEM,		/* struct: Set buffer memory thresholds */
-	VM_PAGECACHE		/* struct: Set cache memory thresholds */
+	VM_PAGECACHE,		/* struct: Set cache memory thresholds */
+	VM_PAGERDAEMON		/* struct: Control kswapd behaviour */
 };
 
 

include/linux/ufs_fs.h

@@ -255,12 +255,12 @@ struct ufs_superblock {
 			__s32	fs_contigsumsize;/* size of cluster summary array */
 			__s32	fs_maxsymlinklen;/* max length of an internal symlink */
 			__s32	fs_inodefmt;	/* format of on-disk inodes */
-			__u64	fs_maxfilesize;	/* max representable file size */
+			__u32	fs_maxfilesize[2];/* max representable file size */
 			__u32	fs_qbmask[2];	/* ~usb_bmask */
 			__u32	fs_qfmask[2];	/* ~usb_fmask */
 			__s32	fs_state;	/* file system state time stamp */
 		} fs_44;
-	} fs_u  __attribute__ ((packed));
+	} fs_u;
 	__s32	fs_postblformat;	/* format of positional layout tables */
 	__s32	fs_nrpos;		/* number of rotational positions */
 	__s32	fs_postbloff;		/* (__s16) rotation block list head */

kernel/sysctl.c

@@ -189,20 +189,22 @@ static ctl_table kern_table[] = {
 
 static ctl_table vm_table[] = {
 	{VM_SWAPCTL, "swapctl", 
-	 &swap_control, sizeof(swap_control_t), 0600, NULL, &proc_dointvec},
+	 &swap_control, sizeof(swap_control_t), 0644, NULL, &proc_dointvec},
 	{VM_SWAPOUT, "swapout_interval",
-	 &swapout_interval, sizeof(int), 0600, NULL, &proc_dointvec},
+	 &swapout_interval, sizeof(int), 0644, NULL, &proc_dointvec},
 	{VM_FREEPG, "freepages", 
-	 &freepages, sizeof(freepages_t), 0600, NULL, &proc_dointvec},
+	 &freepages, sizeof(freepages_t), 0644, NULL, &proc_dointvec},
 	{VM_BDFLUSH, "bdflush", &bdf_prm, 9*sizeof(int), 0600, NULL,
 	 &proc_dointvec_minmax, &sysctl_intvec, NULL,
 	 &bdflush_min, &bdflush_max},
 	{VM_OVERCOMMIT_MEMORY, "overcommit_memory", &sysctl_overcommit_memory,
 	 sizeof(sysctl_overcommit_memory), 0644, NULL, &proc_dointvec},
 	{VM_BUFFERMEM, "buffermem",
-	 &buffer_mem, sizeof(buffer_mem_t), 0600, NULL, &proc_dointvec},
+	 &buffer_mem, sizeof(buffer_mem_t), 0644, NULL, &proc_dointvec},
 	{VM_PAGECACHE, "pagecache",
-	 &page_cache, sizeof(buffer_mem_t), 0600, NULL, &proc_dointvec},
+	 &page_cache, sizeof(buffer_mem_t), 0644, NULL, &proc_dointvec},
+	{VM_PAGERDAEMON, "kswapd",
+	 &pager_daemon, sizeof(pager_daemon_t), 0644, NULL, &proc_dointvec},
 	{0}
 };
 

mm/Makefile

@@ -9,7 +9,7 @@
 
 O_TARGET := mm.o
 O_OBJS	 := memory.o mmap.o filemap.o mprotect.o mlock.o mremap.o \
-	    vmalloc.o slab.o simp.o\
+	    vmalloc.o slab.o \
 	    swap.o vmscan.o page_io.o page_alloc.o swap_state.o swapfile.o
 
 include $(TOPDIR)/Rules.make

mm/page_alloc.c

@@ -125,7 +125,7 @@ int free_memory_available(int nr)
 	 * free unfragmented memory.
 	 * Added low/high water marks to avoid thrashing -- Rik.
 	 */
-	if (nr_free_pages > (num_physpages >> 5) + (nr ? 0 : num_physpages >> 6))
+	if (nr_free_pages > (nr ? freepages.low : freepages.high))
 		return nr+1;
 
 	list = free_area + NR_MEM_LISTS;
@@ -282,7 +282,6 @@ unsigned long __get_free_pages(int gfp_mask, unsigned long order)
 		spin_unlock_irqrestore(&page_alloc_lock, flags);
 		if (!(gfp_mask & __GFP_WAIT))
 			break;
-		shrink_dcache();
 		if (!try_to_free_pages(gfp_mask, SWAP_CLUSTER_MAX))
 			break;
 		gfp_mask &= ~__GFP_WAIT;	/* go through this only once */
@@ -335,15 +334,19 @@ __initfunc(unsigned long free_area_init(unsigned long start_mem, unsigned long e
 	int i;
 
 	/*
-	 * select nr of pages we try to keep free for important stuff
-	 * with a minimum of 48 pages. This is totally arbitrary
+	 * Select nr of pages we try to keep free for important stuff
+	 * with a minimum of 48 pages and a maximum of 256 pages, so
+	 * that we don't waste too much memory on large systems.
+	 * This is totally arbitrary.
 	 */
 	i = (end_mem - PAGE_OFFSET) >> (PAGE_SHIFT+7);
 	if (i < 48)
 		i = 48;
+	if (i > 256)
+		i = 256;
 	freepages.min = i;
-	freepages.low = i + (i>>1);
-	freepages.high = i + i;
+	freepages.low = i << 1;
+	freepages.high = freepages.low + i;
 	mem_map = (mem_map_t *) LONG_ALIGN(start_mem);
 	p = mem_map + MAP_NR(end_mem);
 	start_mem = LONG_ALIGN((unsigned long) p);

mm/swap.c

@@ -44,8 +44,8 @@
  */
 freepages_t freepages = {
 	48,	/* freepages.min */
-	72,	/* freepages.low */
-	96	/* freepages.high */
+	96,	/* freepages.low */
+	144	/* freepages.high */
 };
 
 /* We track the number of pages currently being asynchronously swapped
@@ -77,3 +77,9 @@ buffer_mem_t page_cache = {
 	30,	/* borrow percent page cache */
 	75	/* maximum */
 };
+
+pager_daemon_t pager_daemon = {
+	512,	/* base number for calculating the number of tries */
+	SWAP_CLUSTER_MAX,	/* minimum number of tries */
+	SWAP_CLUSTER_MAX,	/* do swap I/O in clusters of this size */
+};

mm/vmscan.c

@@ -553,22 +553,23 @@ int kswapd(void *unused)
 		 * more aggressive if we're really
 		 * low on free memory.
 		 *
-		 * The number of tries is 512 divided by an
-		 * 'urgency factor'. In practice this will mean
-		 * a value of 512 / 8 = 64 pages at a time,
-		 * giving 64 * 4 (times/sec) * 4k (pagesize) =
-		 * 1 MB/s in lowest-priority background
-		 * paging. This number rises to 8 MB/s when the
-		 * priority is highest (but then we'll be woken
-		 * up more often and the rate will be even higher).
-		 * -- Should make this sysctl tunable...
+		 * We try page_daemon.tries_base times, divided by
+		 * an 'urgency factor'. In practice this will mean
+		 * a value of pager_daemon.tries_base / 8 or 4 = 64
+		 * or 128 pages at a time.
+		 * This gives us 64 (or 128) * 4k * 4 (times/sec) =
+		 * 1 (or 2) MB/s swapping bandwidth in low-priority
+		 * background paging. This number rises to 8 MB/s
+		 * when the priority is highest (but then we'll be
+		 * woken up more often and the rate will be even
+		 * higher).
 		 */
-		tries = (512) >> free_memory_available(3);
+		tries = pager_daemon.tries_base >> free_memory_available(3);
 	
 		while (tries--) {
 			int gfp_mask;
 
-			if (++tried > SWAP_CLUSTER_MAX && free_memory_available(0))
+			if (++tried > pager_daemon.tries_min && free_memory_available(0))
 				break;
 			gfp_mask = __GFP_IO;
 			try_to_free_page(gfp_mask);
@@ -576,7 +577,7 @@ int kswapd(void *unused)
 			 * Syncing large chunks is faster than swapping
 			 * synchronously (less head movement). -- Rik.
 			 */
-			if (atomic_read(&nr_async_pages) >= SWAP_CLUSTER_MAX)
+			if (atomic_read(&nr_async_pages) >= pager_daemon.swap_cluster)
 				run_task_queue(&tq_disk);
 
 		}

scripts/Configure

@@ -53,10 +53,6 @@
 #
 # 090398 Axel Boldt (boldt@math.ucsb.edu) - allow for empty lines in help
 # texts.
-#
-# 100498 Riley Williams (rhw@bigfoot.com) - added ability to display
-# blank lines in help texts: Any line consisting only of a single dot
-# will be displayed blank.
 
 #
 # Make sure we're really running bash.
@@ -107,7 +103,7 @@ ${var}:\\
      then
 	  echo; echo "  Sorry, no help available for this option yet.";echo
      else
-	  (echo; echo "$text") | sed 's/^\.$//' | ${PAGER:-more}
+	  (echo; echo "$text") | ${PAGER:-more}
      fi
   else
      echo;

scripts/Menuconfig

@@ -47,13 +47,6 @@
 #
 # 090398 Axel Boldt (boldt@math.ucsb.edu) - allow for empty lines in help
 # texts.
-#----------------------------------------------------------------------------
-#
-# 10 Apr 1998 - Added ability to display blank lines in help text: Any line
-#               which only contains a single dot will be displayed blank.
-#               Author: Riley Williams <rhw@bigfoot.com>
-#
-#----------------------------------------------------------------------------
 
 
 #
@@ -301,7 +294,7 @@ ${var}:\\
           echo "There is no help available for this kernel option."
 	  return 1
      else
-	  echo "$text" | sed 's/^\.$//'
+	  echo "$text"
      fi
   else
 	 echo "There is no help available for this kernel option."