1. 11 Jun, 2003 12 commits
  2. 10 Jun, 2003 28 commits
    • Andrew Morton's avatar
      [PATCH] drivers/char/mem.c cleanup · a2249c27
      Andrew Morton authored
      From: David Mosberger <davidm@napali.hpl.hp.com>
      
      Here is a simplified version of the earlier /dev/mem cleanup.  This version
      of the patch no longer pretends to support uncached accesses via
      read()/write().  Instead, all it does is:
      
      - consolidate much of the ugly code in uncached_access()
      
      - move pgprot_noncached() macro to pgtable.h for i386, m68k, ppc, ppc64,
        and x86_64
      
      - fix the ia64 implementation to use efi_mem_attributes() to determine
        the cacheability of an address
      
      Eventually, we may want to replace the #ifdef CONFIG_IA64 with #ifdef
      CONFIG_EFI, but we can do this "on demand", if and when EFI-based x86
      machines become more common.
      a2249c27
    • Linus Torvalds's avatar
      Make chr_dev_init() happen after PCI init, but before low-level · 329bc121
      Linus Torvalds authored
      driver initializations
      329bc121
    • Andrew Morton's avatar
      [PATCH] dirty bit clearing on s390. · fe51fa16
      Andrew Morton authored
      From: Martin Schwidefsky <schwidefsky@de.ibm.com>
      
      The S390 hardware has the interesting characteristic that the storage key
      hardware which records a page's pte-dirtiness is also marked dirty when a
      page is modified by the disk hardware.
      
      Consequently, reading data from disk makes the page appear to be dirty and
      things which were read from disk need to be written back.
      
      Up to now s390 uses a special bit in the pte that is set in mk_pte for the
      first user of a page and makes set_pte to clear the storage key.  The problem
      is that this is a race condition if two processes want to access the same
      page simultaneously.  Then the page count is already > 1 in mk_pte and nobody
      will clear the storage key.  It doesn't lead to any data loss because what
      happens is that a clean page is considered dirty and is written back to the
      disk.  The worst scenario is a read only disk where this results in i/o
      errors (but no data loss).
      
      Martin's fix to this is to clear the page's dirty flag in SetPageUptodate().
      Which seems a bit kludgey, but I cannot think of a case in which this in
      incorrect, inadequate or inappropriate.  So...
      fe51fa16
    • Andrew Morton's avatar
      [PATCH] cpqarray.c: fix stack usage · 9174121c
      Andrew Morton authored
      From: Jorn Engel <joern@wohnheim.fh-wedel.de>
      
      Reduce stack usage in the cpqarray ioctl byt several hundred bytes.
      9174121c
    • Andrew Morton's avatar
      [PATCH] devfs_mk_dir() fix · 5e173955
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      There may be multiple gendisks with the same .devfs_name in scsi and we
      call devfs_mk_dir on each of them.  At present that causes a nasty error
      message.  It is better to permit devfs_mk_dir() to appear to have succeeded.
      
      ie: it's a `mkdir -p'.
      5e173955
    • Andrew Morton's avatar
      [PATCH] fix hangs with nfs to localhost · b91404d3
      Andrew Morton authored
      An NFS mount of localhost hangs the system under heavy writeout loads.
      
      This is because knfsd gets stuck in balance_dirty_pages().  It is not allowed
      to exit from there until the amount of dirty+writeback+unstable memory
      subsides.  But it will never subside because knfsd itself is responsible for
      cleaning the memory.
      
      This is just like the drivers/block/loop.c hang, only more complex.  We
      cannot simply disable knfsd's throttling because it would then swamp the
      machine under real loads when the clients are remote.
      
      So we introduce the concept of a "less throttled" process.  These processes
      are allowed to exceed the preset dirty memory limits by a little.  This
      allows knfsd to make progrws in writing things out while the local NFS
      clients are throttled.  It also ensures that knfsd will not swamp the machine
      when working on behalf of remote clients.
      
      Note that even though knfsd is allowed to exceed the default system-wide
      dirty memory threshold, this does _not_ cause other memory-dirtying tasks to
      get starved out.  This is because they are allowed to exit
      balance_dirty_pages() after having written their quota of pages, regardless
      of the current dirty memory state.
      b91404d3
    • Andrew Morton's avatar
      [PATCH] fix oops in driver/serial/core.c · 960fc49f
      Andrew Morton authored
      From: hugang <hugang@soulinfo.com>
      
      It has a rather blatant null pointer deref and attempted memory leak.
      960fc49f
    • Andrew Morton's avatar
      [PATCH] fix numa meminfo · 14a64515
      Andrew Morton authored
      From: Dave Hansen <haveblue@us.ibm.com>
      
      We didn't notice this for a while because we didn't have any memory holes
      on the NUMA-Q, but on the x440, we do.
      14a64515
    • Andrew Morton's avatar
      [PATCH] fix scheduler bug not passing idle · dd1b5a41
      Andrew Morton authored
      From: "Martin J. Bligh" <mbligh@aracnet.com>
      
      rebalance_tick is not properly passing the idle argument through to
      load_balance in one case.  The fix is trivial.  Pointed out by John Hawkes.
      dd1b5a41
    • Andrew Morton's avatar
      [PATCH] optimize fixed-sized kmalloc calls · 95203fe7
      Andrew Morton authored
      From: Manfred Spraul and Brian Gerst
      
      The patch performs the kmalloc cache lookup for constant kmalloc calls at
      compile time.  The idea is that the loop in kmalloc takes a significant
      amount of time, and for kmalloc(4096,GFP_KERNEL), that lookup can happen
      entirely at compile time.
      
      A problem has been seen with gcc-3.2.2-5 from RedHat.  This code:
      
          if(__builtin_constant_t(size)) {
                if(size < 32) return kmem_cache_alloc(...);
                if(size < 64) return kmem_cache_alloc(...);
                if(size < 96) return kmem_cache_alloc(...);
                if(size < 128) return kmem_cache_alloc(...);
                ...
          }
      
      doesn't work, because gcc only optimizes the first two or three comparisons,
      and then suddenly generates code.
      
      But we did it that way anyway.  Apparently it's fixed in later compilers.
      95203fe7
    • Andrew Morton's avatar
      [PATCH] update MAINTAINERS for Compaq drivers · 9c1d0794
      Andrew Morton authored
      From: "Ni, Michael" <Michael.Ni@hp.com>
      
      Update the MAINTANERS file for the various Compaq mass-storage drivers
      9c1d0794
    • Andrew Morton's avatar
      [PATCH] fix TARGET_CPUS inconsistency · d0d8e5a6
      Andrew Morton authored
      From: "Martin J. Bligh" <mbligh@aracnet.com>
      
      Patch from Martin Bligh, based on observations by Andrew Theurer and Bill
      Irwin.
      
      TARGET_CPUS is used as a cpu mask by some things, and an apic mask for
      others.  For SMP, that doesn't matter (they're the same), but for Summit it
      does.  This patch changes TARGET_CPUS to consistently be a cpu mask
      everywhere.  Should be a no-op for normal platforms.
      
      Invalid arguments to cpu_mask_to_apicid for clustered apic mode
      architectures will now return the broadcast apicid, in order to ensure
      someone still gets the interrupt (was the default init value, and is
      safest).
      d0d8e5a6
    • Andrew Morton's avatar
      [PATCH] fix discontig with 0-sized nodes · 9d7a7faf
      Andrew Morton authored
      From: Dave Hansen <haveblue@us.ibm.com>
      
      In order to turn an 8-way x440 into a 4-way for testing, we often use
      mem=(1/2 of total) and maxcpus=4.  maxcpus has always worked, but mem=
      hasn't.  The mem= parameter actually changes the kernel's e820 structure,
      which manifests itself as max_pfn.  node_end_pfn[] obeys this because of
      find_max_pfn_node(), but node_start_pfn[] wasn't modified.
      
      If you have a mem= line that causes memory to stop before the beginning of
      a node, you get a condition where start > end (because start was never
      modified).  There is a bug check for this, but it was placed just _before_
      the error was made :)
      
      Also, the bootmem alloc functions die if you request something of zero size
      from them.  This patch avoids that too.  This shouldn't have much of an
      effect on non-NUMA systems.
      9d7a7faf
    • Andrew Morton's avatar
      [PATCH] fix possible busywait in rtc_read() · 1e955536
      Andrew Morton authored
      If two processes are waiting in rtc_read(), only one will get the data.  The
      other will madly spin around theloop in state TASK_RUNNING until another
      interrupt happens.
      
      Fix it by resetting TASK_INTERRUPTIBLE _inside_ the retry loop.
      1e955536
    • Andrew Morton's avatar
      [PATCH] Remove DRM ioctls for common compat ioctl code · b04ed0ee
      Andrew Morton authored
      From: Andi Kleen <ak@suse.de>
      
      This makes the 2.5 kernel with common ioctl32 code compile with DRM enabled
      again.  The DRM code in the kernel is obsolete anyways and has been long
      removed.  It definitely does not belong in the common ioctl emulation
      layer.
      
      Egbert Eich is working on proper 32bit DRM emulation, but it will be likely
      directly integrated in the DRI/DRM sources.
      b04ed0ee
    • Linus Torvalds's avatar
      Avoid warning by using an inline function rather than a macro · 1ac3ca25
      Linus Torvalds authored
      for the default "pci_domain_nr()" definition. The inline function
      will evaluate the argument.
      1ac3ca25
    • Rusty Russell's avatar
      [PATCH] Fix module load failure case · 2c435ad4
      Rusty Russell authored
      Milton Miller noticed a free-after-use problem in the cleanup path of a
      failed module load.
      
      The problem is that mod is moved to point from the sucked-in file
      (always freed last) to the module core, after which time the
      "free(mod->core), reference mod->percpu" sequence is bogus, eg.  when
      the module_init function fails.
      
      This is fixed by keeping the pointer in a local variable, which solves
      the problem. We no longer need to reference the free'd data structure.
      2c435ad4
    • Steven Cole's avatar
    • Neil Brown's avatar
      [PATCH] md - Zero out some kmalloced space in md driver · ccd3a853
      Neil Brown authored
      This should fix most (all??) of the recently reported problems with MD:
      
      Recent changes to md malloced some data structures differently and
      didn't zero out those data structures, where the old code had zeroed it
      out.
      
      This adds the relevant memsets.
      ccd3a853
    • Linus Torvalds's avatar
      Merge bk://kernel.bkbits.net/gregkh/linux/pci-2.5 · 3935761c
      Linus Torvalds authored
      into home.transmeta.com:/home/torvalds/v2.5/linux
      3935761c
    • Linus Torvalds's avatar
      Merge bk://kernel.bkbits.net/gregkh/linux/linus-2.5 · c1cdc0d2
      Linus Torvalds authored
      into home.transmeta.com:/home/torvalds/v2.5/linux
      c1cdc0d2
    • Greg Kroah-Hartman's avatar
      Merge kroah.com:/home/greg/linux/BK/bleed-2.5 · 65458f96
      Greg Kroah-Hartman authored
      into kroah.com:/home/greg/linux/BK/pci-2.5
      65458f96
    • Greg Kroah-Hartman's avatar
      9d02c2be
    • Greg Kroah-Hartman's avatar
    • Greg Kroah-Hartman's avatar
    • Greg Kroah-Hartman's avatar
      b1ae8858
    • Greg Kroah-Hartman's avatar
      a4e90313
    • Linus Torvalds's avatar
      Don't make the source checker default path be quite · e5b387c9
      Linus Torvalds authored
      so hackish.
      e5b387c9