1. 04 Feb, 2003 14 commits
    • Andrew Morton's avatar
      [PATCH] Restore LSM hook calls to sendfile · 776ad141
      Andrew Morton authored
      Patch from "Stephen D. Smalley" <sds@epoch.ncsc.mil>
      
      This patch restores the LSM hook calls in sendfile to 2.5.59.  The hook was
      previously added as of 2.5.29 but the hook calls in sendfile were
      subsequently lost as a result of the sendfile rewrite as of 2.5.30.
      776ad141
    • Andrew Morton's avatar
      [PATCH] hangcheck-timer · 5dd7d1b6
      Andrew Morton authored
      Patch from: Joel Becker <Joel.Becker@oracle.com>
      
      This kernel module will detect long durations when jiffies has failed to
      increment, and will reboot the machine in response.
      
      Joel says:
      
      
      "Here's why Oracle wants such a thing.  We run clusters.  Imagine a two node
       cluster.  Node1 pauses completely for some reason.  There are multiple
       reasons this can happen.  A bad driver can udelay() for 90 seconds (qla used
       to do this).  zVM on S/390 can page Linux out for minutes at a time.
       Anything that causes the box to freeze.  Jiffies does *not* count during
       this, so when Node1 returns it feels that no time has passed.
      
       Node2, however, has been counting time.  When Node1 goes away, the Oracle
       cluster manager starts looking for it.  After a timeout, it gives up.  It
       then recovers any in-progress transactions from Node1.  After that, it
       starts new operations, modifying the data in ways that Node1 has no idea
       about (it's still out to lunch).
      
       When Node1 finally returns (udelay() ends, zVM pages it in, whatever), any
       I/O that it has queued or is about to queue will get sent to the disk.
       Oops, you've just corrupted your shared data.
      
       hangcheck-timer should catch this and reboot the box.
      
       This is why Oracle wants this driver.  We figure that such functionality
       would be beneficial to others as well, so we posted to l-k.  We'd all hope
       that driver writers don't udelay() for 90s, but S/390 with zVM is still
       around.  Some folks might want to notice when it happens.  I am sure other
       things exist that trigger the same symptoms."
      5dd7d1b6
    • Andrew Morton's avatar
      [PATCH] remove unneeded locking in do_syslog() · 46052b73
      Andrew Morton authored
      Lots of nonsensical locking in there.
      46052b73
    • Andrew Morton's avatar
      [PATCH] Avoid losing timer ticks when slab debug is enabled. · cf336416
      Andrew Morton authored
      Patch from Manfred Spraul <manfred@colorfullife.com>
      
      When slab debugging is enabled we're holding off interrupts for too long
      (more than a jiffy), so reduce the alloc/free batching size when slab debug
      is enabled.
      cf336416
    • Andrew Morton's avatar
      [PATCH] pgd_ctor update · ee3ddbbd
      Andrew Morton authored
      From wli
      
      A moment's reflection on the subject suggests to me it's worthwhile to
      generalize pgd_ctor support so it works (without #ifdefs!) on both PAE
      and non-PAE. This tiny tweak is actually more noticeably beneficial
      on non-PAE systems but only really because pgd_alloc() is more visible;
      the most likely reason it's less visible on PAE is "other overhead".
      It looks particularly nice since it removes more code than it adds.
      
      Touch tested on NUMA-Q (PAE). OFTC #kn testers testing the non-PAE case.
      ee3ddbbd
    • Andrew Morton's avatar
      [PATCH] Use a slab cache for pgd and pmd pages · a85cb652
      Andrew Morton authored
      From Bill Irwin
      
      This allocates pgd's and pmd's using the slab and slab ctors.  It has a
      benefit beyond preconstruction in that PAE pmd's are accounted via
      /proc/slabinfo
      
      Profiling of kernel builds by Martin Bligh shows a 30-40% drop in CPU load
      due to pgd_alloc()'s page clearing activity.  But this was already a tiny
      fraction of the overall CPU time.
      a85cb652
    • Andrew Morton's avatar
      [PATCH] remove __GFP_HIGHIO · 3ac8c845
      Andrew Morton authored
      Patch From: Hugh Dickins <hugh@veritas.com>
      
      Recently noticed that __GFP_HIGHIO has played no real part since bounce
      buffering was converted to mempool in 2.5.12: so this patch (over 2.5.58-mm1)
      removes it and GFP_NOHIGHIO and SLAB_NOHIGHIO.
      
      Also removes GFP_KSWAPD, in 2.5 same as GFP_KERNEL; leaves GFP_USER, which
      can be a useful comment, even though in 2.5 same as GFP_KERNEL.
      
      One anomaly needs comment: strictly, if there's no __GFP_HIGHIO, then
      GFP_NOHIGHIO translates to GFP_NOFS; but GFP_NOFS looks wrong in the block
      layer, and if you follow them down, you find that GFP_NOFS and GFP_NOIO
      behave the same way in mempool_alloc - so I've used the less surprising
      GFP_NOIO to replace GFP_NOHIGHIO.
      3ac8c845
    • Andrew Morton's avatar
      [PATCH] cleanup in read_cache_pages() · 99c88bc2
      Andrew Morton authored
      Patch from Nikita Danilov <Nikita@Namesys.COM>
      
      read_cache_pages() is passed a bunch of pages to start I/O against and it is
      supposed to consume all those pages.  But if there is an I/O error, someone
      need to throw away the unused pages.
      
      At present the single user of read_cache_pages() (nfs_readpages) does that
      cleanup by hand.  But it should be done in the core kernel.
      99c88bc2
    • Andrew Morton's avatar
      [PATCH] mm/mmap.c whitespace cleanups · cecee739
      Andrew Morton authored
      - Don't require a 160-col xterm
      
      - Coding style consistency
      cecee739
    • Andrew Morton's avatar
      [PATCH] file-backed vma merging · 6b2ca90b
      Andrew Morton authored
      Implements merging of file-backed VMA's.  Based on Andrea's 2.4 patch.
      
      It's only done for mmap().  mprotect() and mremap() still will not merge
      VMA's.
      
      It works for hugetlbfs mappings also.
      6b2ca90b
    • Andrew Morton's avatar
      [PATCH] add stats for page reclaim via inode freeing · b29422e3
      Andrew Morton authored
      pagecache can be reclaimed via the page LRU and via prune_icache.  We
      currently don't know how much reclaim is happening via each.
      
      The patch adds instrumentation to display the number of pages which were
      freed via prune_icache.  This is displayed in /proc/vmstat:pginodesteal and
      /proc/vmstat:kswapd_inodesteal.
      
      Turns out that under some workloads (well, dbench at least), fully half of
      page reclaim is via the unused inode list.  Which seems quite OK to me.
      b29422e3
    • Andrew Morton's avatar
      [PATCH] fix agp compile warning · f5585f5d
      Andrew Morton authored
      A static function in a header where presumably a static inline was intended.
      f5585f5d
    • Andrew Morton's avatar
      [PATCH] implement posix_fadvise64() · fccbe384
      Andrew Morton authored
      An implementation of posix_fadvise64().  It adds 368 bytes to my vmlinux and
      is worth it.
      
      I didn't bother doing posix_fadvise(), as userspace can implement that by
      calling fadvise64().
      
      The main reason for wanting this syscall is to provide userspace with the
      ability to explicitly shoot down pagecache when streaming large files.  This
      is what O_STEAMING does, only posix_fadvise() is standards-based, and harder
      to use.
      
      posix_fadvise() also subsumes sys_readahead().
      
      POSIX_FADV_WILLNEED will generally provide asynchronous readahead semantics
      for small amounts of I/O.  As long as things like indirect blocks are aready
      in core.
      
      POSIX_FADV_RANDOM gives unprivileged applications a way of disabling
      readahead on a per-fd basis, which may provide some benefit for super-seeky
      access patterns such as databases.
      
      
      
      The POSIX_FADV_* values are already implemented in glibc, and this patch
      ensures that they are in sync.
      
      A test app (fadvise.c) is available in ext3 CVS.  See
      
      	http://www.zip.com.au/~akpm/linux/ext3/
      
      for CVS details.
      
      Ulrich has reviewed this patch (thanks).
      fccbe384
    • Nathan Laredo's avatar
      [PATCH] stradis.c "proper" port to 2.5.x · e7bfb1db
      Nathan Laredo authored
      e7bfb1db
  2. 03 Feb, 2003 15 commits
  3. 02 Feb, 2003 11 commits
    • James Bottomley's avatar
    • Jeff Garzik's avatar
      Merge kernel.bkbits.net:net-drivers-2.5 · 0145e5c9
      Jeff Garzik authored
      into redhat.com:/garz/repo/net-drivers-2.5
      0145e5c9
    • Linus Torvalds's avatar
      Merge bk://bk.arm.linux.org.uk · 49a85c6a
      Linus Torvalds authored
      into home.transmeta.com:/home/torvalds/v2.5/linux
      49a85c6a
    • Russell King's avatar
      [ARM] Add arch/arm/common · 1687c697
      Russell King authored
      Certain support files are shared between various ARM machine classes.
      In other to sanely support these, we place the shared files in
      arch/arm/common instead of the individual machine class directories.
      1687c697
    • Linus Torvalds's avatar
      Merge · 4251bd1a
      Linus Torvalds authored
      4251bd1a
    • Andrew Morton's avatar
      [PATCH] fix show_task oops · c7766898
      Andrew Morton authored
      Patch from Russell King <rmk@arm.linux.org.uk>
      
      show_task() attempts to calculate the amount of free space which hasn't been
      written to on the kernel stack by reading from the base of the kernel stack
      upwards.
      
      However, it mistakenly uses the task_struct pointer as the base of the stack,
      which it isn't, and this can cause an oops.
      
      Here is a patch which uses the task thread pointer instead, which should be
      located at the bottom of the kernel stack.  It appears this was missed when
      the thread structure was introduced.
      c7766898
    • Andrew Morton's avatar
      [PATCH] exit_mmap fix for 64bit->32bit execs · 2e7c21ea
      Andrew Morton authored
      The recent exit_mmap() changes broke PPC64 when 64-bit applications exec
      32-bit ones.  ia32-on-ia64 was broken as well
      
      What is happening is that load_elf_binary() sets TIF_32BIT (via
      SET_PERSONALITY) _before_ running exit_mmap().  So when we're unmapping the
      vma's of the old image, we are running under the new image's personality.
      
      This causes PPC64 to pass a 32-bit TASK_SIZE to unmap_vmas(), even when the
      execing process had a 64-bit image.  Because unmap_vmas() is not provided
      with the correct virtual address span it does not unmap all the old image's
      vma's and we go BUG_ON(mm->map_count) in exit_mmap().
      
      The early SET_PERSONALITY() is required before we look up the interpreter
      because the lookup of the executable has to happen under the alternate root
      which SET_PERSONALITY() may set.
      
      Unfortunately this means that we're running flush_old_exec() under the new
      exec's personality.  Hence this bug.
      
      So what the patch does is to simply pass ~0UL into unmap_vmas(), which tells
      it to unmap everything regardless of current personality.  Which is what the
      old open-coded VMA killer was doing.
      
      There remains the problem that some architectures are sometimes passing the
      incorrect TASK_SIZE into tlb_finish_mmu().  They've always been doing that.
      2e7c21ea
    • Andrew Morton's avatar
      [PATCH] Fix generic_file_readonly_mmap() · b91c1b1b
      Andrew Morton authored
      We cannot clear VM_MAYWRITE in there - it turns writeable MAP_PRIVATE
      mappings into readonly ones.
      
      So change it back to the 2.4 form - disallow a writeable MAP_SHARED mapping
      against filesystems which do not implement ->writepage().
      b91c1b1b
    • Andrew Morton's avatar
      [PATCH] soundcore.c referenced non-existent errno variable · 858743c2
      Andrew Morton authored
      Patch from: Petr Vandrovec <vandrove@vc.cvut.cz>
      
      soundcore is trying to perform kernel syscalls to load firmware, but falls
      afoul of missing `errno'.  Convert it to use VFS API functions.
      858743c2
    • Andrew Morton's avatar
      [PATCH] floppy locking fix · 7bb503fc
      Andrew Morton authored
      redo_fd_request() needs to take the queue lock around the call to
      elv_next_request().
      7bb503fc
    • Andrew Morton's avatar
      [PATCH] atyfb compilation fix · 0391b9be
      Andrew Morton authored
      Patch from "Andres Salomon" <dilinger@voxel.net>
      
      Fix compilation of atyfb_base.c
      0391b9be