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  1. 31 Aug, 2004 8 commits
    • Takashi Iwai's avatar
      [PATCH] Fix the unnecessary entropy call in the irq handler · 8cd809c5
      Takashi Iwai authored 
      Currently add_interrupt_randomness() is called at each interrupt when one
of the handlers has SA_SAMPLE_RANDOM flag, regardless whether the interrupt
is processed by that handler or not.  This results in the higher latency
and perfomance loss.

The patch fixes this behavior to avoid the unnecessary call by checking the
return value from each handler.
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      8cd809c5
    • Prasanna S. Panchamukhi's avatar
      [PATCH] Jumper Probes to provide function arguments · b08e7589
      Prasanna S. Panchamukhi authored 
      A special kprobe type which can be placed on function entry points, and
employs a simple mirroring principle to allow seamless access to the
arguments of a function being probed.  The probe handler routine should
have the same prototype as the function being probed.  Currently
implemented for x86.

The way it works is that when the probe is hit, the breakpoint handler
simply irets to the probe handler's eip while retaining register and stack
state corresponding to the function entry.  After it is done, the probe
handler calls jprobe_return() which traps again to restore processor state
and switch back to the probed function.  Linus noted correctly at KS that
we need to be careful as gcc assumes that the callee owns arguments.  We
save and restore enough stack bytes to cover argument space.

Sample Usage:
	static int jip_queue_xmit(struct sk_buff *skb, int ipfragok)
	{
		... whatever ...
		jprobe_return();
		return 0;
	}

	struct jprobe jp = {
		{.addr = (kprobe_opcode_t *) ip_queue_xmit},
		.entry = (kprobe_opcode_t *) jip_queue_xmit
	};
	register_jprobe(&jp);
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      b08e7589
    • Prasanna S. Panchamukhi's avatar
      [PATCH] kprobes base patch · 4ece5899
      Prasanna S. Panchamukhi authored 
      This patch helps developers to trap at almost any kernel code address,
specifying a handler routine to be invoked when the breakpoint is hit.  

Useful for analysing the Linux kernel by collecting debugging information
non-disruptively.  Employs single-stepping out-of-line to avoid probe
misses on SMP and may be especially useful in aiding debugging elusive
races and problems on live systems.  More elaborate dynamic tracing tools
such as DProbes can be built over the kprobes interface.


Helps developers to trap at almost any kernel code address, specifying a
handler routine to be invoked when the breakpoint is hit.  Useful for
analysing the Linux kernel by collecting debugging information
non-disruptively.  Employs single-stepping out-of-line to avoid probe
misses on SMP and may be especially useful in aiding debugging elusive
races and problems on live systems.  More elaborate dynamic tracing tools
such as DProbes can be built over the kprobes interface.

Sample usage:
	To place a probe on __blockdev_direct_IO:
	static int probe_handler(struct kprobe *p, struct pt_regs *)
	{
		... whatever ...
	}
	struct kprobe kp = {
		.addr = __blockdev_direct_IO,
		.pre_handler = probe_handler
	};
	register_kprobe(&kp);
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      4ece5899
    • Prasanna S. Panchamukhi's avatar
      [PATCH] i386 exceptions notifier for kprobes · f63b75f9
      Prasanna S. Panchamukhi authored 
      This patch provides notifiers for i386 architecture exceptions.  This patch
has been ported from x86_64 architecture as suggested by Andi Kleen.
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      f63b75f9
    • Philippe Elie's avatar
      [PATCH] Fix oops with nmi-watchdog=2 · 5ae3fd75
      Philippe Elie authored 
      Contributions from  Zarakin <zarakin@hotpop.com>

Intel removed two msrs: MSR_P4_IQ_ESCR_0|1 (0x3ba/0x3bb), P4 model >= 3.  See
Intel documentation Vol.  3 System Programming Guide Appendix B.

nmi_watchdog=2 oopsed at boot time and oprofile at driver load.

Avoid touching them when model >= 3.
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      5ae3fd75
    • Jason Davis's avatar
      [PATCH] platform update for ES7000 · 75b02c33
      Jason Davis authored 
      This update only applies to Unisys' ES7000 server machines.  The patch adds
a OEM id check to verify the current machine running is actually a Unisys
type box before executing the Unisys OEM parser routine.  It also increases
the MAX_MP_BUSSES definition from 32 to 256.  On the ES7000s, bus ID
numbering can range from 0 to 255.  Without the patch, the system panics if
booted with acpi=off.

This patch has been tested and verified on an authentic ES7000 machine.
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      75b02c33
    • Bjorn Helgaas's avatar
      [PATCH] Make assign_irq_vector() non-__init · 92d1cc78
      Bjorn Helgaas authored 
      Make assign_irq_vector() non-__init always (it's called from
io_apic_set_pci_routing(), which is used in the pci_enable_device() path).
Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      92d1cc78
    • Anton Blanchard's avatar
      [PATCH] prio-tree: remove function prototype inside function · f4939b75
      Anton Blanchard authored 
      I had a problem when compiling a 2.6 kernel with gcc 3.5 CVS.  The
prototype for prio_tree_remove in mm/prio_tree.c is inside another
function.  gcc 3.5 gets upset and removes the function completely.
Apparently this isnt valid C, so lets fix it up.

Details can be found here:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17205Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      f4939b75
  3. 30 Aug, 2004 3 commits
  5. 31 Aug, 2004 3 commits
  7. 30 Aug, 2004 9 commits
  9. 29 Aug, 2004 6 commits
  11. 28 Aug, 2004 11 commits
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