1. 02 Jun, 2002 21 commits
    • Andrew Morton's avatar
      [PATCH] swapcache bugfixes · 91cb02b7
      Andrew Morton authored
      Fixes a few lock ranking bugs (and deadlocks) related to
      swap_list_lock(), swap_device_lock(), mapping->page_lock and
      mapping->private_lock.
      
      - Cannot call block_flushpage->try_to_free_buffers() inside
        mapping->page_lock.  Because __set_page_dirty_buffers() takes
        ->page_lock inside ->private-lock.
      
      - Cannot call swap_free->swap_list_lock/swap_device_lock inside
        mapping->page_lock because exclusive_swap_page() takes ->page_lock
        inside swap_info_get().
      
      
      The patch also removes all the block_flushpage() calls from the swap
      code in favour of a direct call to try_to_free_buffers().
      
      The theory is that the page is locked, there is no I/O underway, nobody
      else has access to the buffers so they MUST be freeable.  A bunch of
      BUG() checks have been added, and unless someone manages to trigger
      one, the "block_flushpage() inside spinlock" problem is fixed.
      91cb02b7
    • Andrew Morton's avatar
      [PATCH] give swapper_space a set_page_dirty a_op · 3aeb30b0
      Andrew Morton authored
      Give swapper_space a ->set_page_dirty() address_space_operation.
      
      So swapcache pages do not need special-casing in
      set_page_dirty_buffers().
      3aeb30b0
    • Andrew Morton's avatar
      [PATCH] direct-to-BIO writeback for writeback-mode ext3 · da9bfeb4
      Andrew Morton authored
      Turn on direct-to-BIO writeback for ext3 in data=writeback mode.
      da9bfeb4
    • Andrew Morton's avatar
      [PATCH] rename block_symlink() to page_symlink() · 5a302308
      Andrew Morton authored
      block_symlink() is not a "block" function at all.  It is a pure
      pagecache/address_space function.  Seeing driverfs calling it was
      the last straw.
      
      The patch renames it to `page_symlink()' and moves it into fs/namei.c
      5a302308
    • Andrew Morton's avatar
      [PATCH] remove inode.i_wait · ddedde1d
      Andrew Morton authored
      Remove i_wait from struct inode and hash it instead.
      
      This is a pure space-saving exercise - 12 bytes from struct
      inode on x86.
      
      NFS was using i_wait for its own purposes.  Add a wait_queue_head_t to
      the fs-private inode for that.  This change has been acked by Trond.
      ddedde1d
    • Andrew Morton's avatar
      [PATCH] buffer_boundary() for ext3 · e40df2d9
      Andrew Morton authored
      Implement buffer_boundary() for ext3.
      
      buffer_boundary() is an I/O scheduling hint which the filesystem's
      get_block() function passes up to the BIO assembly code.  It is
      described in fs/mpage.c
      
      The time to read 1,000 52 kbyte files goes from 8.6 seconds down to 2.9
      seconds.  52 kbytes is the worst-case size.
      e40df2d9
    • Andrew Morton's avatar
      [PATCH] speed up writes · 7e7382fd
      Andrew Morton authored
      Speeds up generic_file_write() by not calling mark_inode_dirty() when
      the mtime and ctime didn't change.
      
      There may be concerns over the fact that this restricts mtime and ctime
      updates to one-second resolution.  But the interface doesn't support
      that anyway - all the filesystem knows is that its dirty_inode()
      superop was called.  It doesn't know why.
      
      So filesystems which support high-resolution timestamps already need to
      make their own arrangements.  We need an update_mtime i_op to support
      those properly.
      
      time to write a one megabyte file one-byte-at-a-time:
      
      Before:
      	ext3:		24.8 seconds
      	ext2:		 4.9 seconds
      	reiserfs:	17.0 seconds
      After:
      	ext3:		22.5 seconds
      	ext2:		4.8  seconds
      	reiserfs:	11.6 seconds
      
      Not much improvement because we're also calling expensive
      mark_inode_dirty() functions when i_size is expanded.  So compare the
      overwrite case:
      
      time dd if=/dev/zero of=foo bs=1 count=1M conv=notrunc
      
      ext3 before:	20.0 seconds
      ext3 after:	9.7  seconds
      7e7382fd
    • Andrew Morton's avatar
      [PATCH] fix swapcache packing in the radix tree · 02eaba7f
      Andrew Morton authored
      First some terminology: this patch introduces a kernel-wide `pgoff_t'
      type.  It is the index of a page into the pagecache.  The thing at
      page->index.  For most mappings it is also the offset of the page into
      that mapping.  This type has a very distinct function in the kernel and
      it needs a name.  I don't have any particular plans to go and migrate
      everything so we can support 64-bit pagecache indices on x86, but this
      would be the way to do it.
      
      This patch improves the packing density of swapcache pages in the radix
      tree.
      
      A swapcache page is identified by the `swap type' (indexes the swap
      device) and the `offset' (into that swap device).  These two numbers
      are encoded into a `swp_entry_t' machine word in arch-specific code
      because the resulting number is placed into pagetables in a form which
      will generate a fault.
      
      The kernel also need to generate a pgoff_t for that page to index it
      into the swapper_space radix tree.  That pgoff_t is usually
      bitwise-identical to the swp_entry_t.  That worked OK when the
      pagecache was using a hash.  But with a radix tree, it produces
      catastrophically bad results.
      
      x86 (and many other architectures) place the `type' field into the
      low-order bits of the swp_entry_t.  So *all* swapcache pages are
      basically identical in the eight low-order bits.  This produces a very
      sparse radix tree for swapcache.  I'm observing packing densities of 1%
      to 2%: so the typical 128-slot radix tree node has only one or two
      pages in it.
      
      The end result is that the kernel needs to allocate approximately one
      new radix-tree node for each page which is added to the swapcache.  So
      no wonder we're having radix-tree node exhaustion during swapout!
      (It's actually quite encouraging that the kernel works as well as it
      does).
      
      The patch changes the encoding of the swp_entry_t so that its
      most-significant bits contain the `type' field and the
      least-significant bits contain the `offset' field, right-aligned.
      
      That is: the encoding in swp_entry_t is now arch-independent.  The new
      file <linux/swapops.h> has conversion functions which convert the
      swp_entry_t to and from its machine pte representation.
      
      Packing density in the swapper_space mapping goes up to around 90%
      (observed) and the kernel is tons happier under swap load.
      
      
      An alternative approach would be to create new conversion functions
      which convert an arch-specific swp_entry_t to and from a pgoff_t.  I
      tried that.  It worked, but I liked it less.
      02eaba7f
    • Andrew Morton's avatar
      [PATCH] remove PageSkip() macros · 0f2b38d5
      Andrew Morton authored
      Remove some unused PageSkip() macros.  Presumably leftovers from
      PG_skip which isn't there any more.
      0f2b38d5
    • Andrew Morton's avatar
      [PATCH] list_head debugging · b9a78e59
      Andrew Morton authored
      A common and very subtle bug is to use list_heads which aren't on any
      lists.  It causes kernel memory corruption which is observed long after
      the offending code has executed.
      
      The patch nulls out the dangling pointers so we get a nice oops at the
      site of the buggy code.
      b9a78e59
    • Jens Axboe's avatar
      [PATCH] Re: ufs compile error in 2.5.19] · 123d6742
      Jens Axboe authored
      I missed this one in the last patch I sent to you.
      123d6742
    • Jens Axboe's avatar
      [PATCH] update to the update · 86225b5e
      Jens Axboe authored
      Too much copy'n paste between 2.4 and 2.5 code base, attached patch on
      top of the previous block tag fixes makes it work/compile again. Sorry
      about that.
      86225b5e
    • Jens Axboe's avatar
      [PATCH] misc generic block tag fixes · e3102b26
      Jens Axboe authored
      A buglet and a few adjustments.
      e3102b26
    • Jens Axboe's avatar
      [PATCH] documentation and tq_disk removals · 15283e97
      Jens Axboe authored
      This should be the last of tq_disk, at least the trivial ones. md still
      has some queue_task references, I'll let Ingo/Neil clean those up.
      suspend is still broken, it was broken before too though. I guess Pavel
      will want to fix that.
      
      Also, I've documented the plug functions.
      15283e97
    • Martin Dalecki's avatar
      [PATCH] 2.5.19 IDE 82 · 6e7c72aa
      Martin Dalecki authored
       - PPC compilation fix by Paul Mackerras.
      
       - Various fixes by Bartek:
      
         fix ata_irq_enable() and ata_reset() for legacy ATA-1 devices
      
         in start_request() for REQ_DRIVE_ACB
         a) don't run ->prehandler() twice
         b) return ata_taskfile() value
      6e7c72aa
    • Martin Dalecki's avatar
      [PATCH] 2.5.19 IDE 81 · 08446d85
      Martin Dalecki authored
       - Don't use ata_taskfiles cmd field for drive status reporting,
         we can now simply use drive->status instead.
      
       - Unify command type parser entries which could be unified due to the
         unification of corresponding interrupt handlers.
      
       - Eliminate reading parameter from ata_do_udma(). We have this information
         already in the rq. This allows us to merge several methods.
      
       - Rename XXX_udma to udma_setup, since we have finally settled up on this
         semantics.
      
       - Simplify tons of host chip code by removing wrapper functions.
      08446d85
    • Martin Dalecki's avatar
      [PATCH] 2.5.19 IDE 80 · 76d04538
      Martin Dalecki authored
       - Sanitize the handling of the ioctl's and fix a bug on the way in dealing with
         the WIN_SMART command where arguments where exchanged.
      
       - Finally sanitize ioctl further until it turned out that we could get rid of
         the special request type REQ_DRIVE_CMD entierly. We are now using
         consistently REQ_DRIVE_ACB.
      
         One hidden code path less again!
      
       - Realize the ide_end_drive_cmd can be on the REQ_DRIVE_ACB only for ioctl() to
         a disk. Eliminate it's usage from device type driver modules.
      
       - Remove command member from struct  hd_drive_task_hdr and place it in strcut
         ata_taskfile. It is not common between the normal register file and HOB.
      
         We will have to introduce some helper functions for particular command types.
      76d04538
    • Martin Dalecki's avatar
      [PATCH] [PATCH} 2.5.19 IDE 79 · b6e6f175
      Martin Dalecki authored
       - Fix typo in sparc_v9 code, in ns87415, just introduced.
      
       - Eliminate unnecessary struct hd_drive_hob_hdr those are
         in reality precisely the same registers as usual.
      
       - Eliminate control_t, nowhere used type.
      
       - Unfold ide_init_drive_cmd() at the places where it's used. This makes obvious
         that REQ_DRIVE_CMD gets only used on the ioctl command path.
      b6e6f175
    • Martin Dalecki's avatar
      [PATCH] 2.5.19 IDE 78 · 8b4e98ea
      Martin Dalecki authored
       - Move ide_fixstring() from ide.c to probe.c, since this is the place, where it's
         most used.
      
       - Remove GET_STAT() - it's not used any longer.
      
       - Remove last parameter of ide_error. Rename it to ata_error().
      
       - Don't use ide_fixstring in qd65xx.c host chip driver. The model name is
         already fixed in probe.c.
      
       - Invent ata_irq_enable() for the handling of the trice nIEN bit of the
         control register.  Consistently use ch->intrproc method every time we toggle
         this bit.  This simply wasn't the case before!
      
       - Disable interrupts on a previous channel only when we share them indeed.
      
       - Eliminate simple drive command handling function drive_cmd.
      
       - Simplify the ioctl handler. Move it to ioctl, since that's the only place
         where it's actually used.
      8b4e98ea
    • Linus Torvalds's avatar
      Simplify uidhash table allocation - no need to make it dynamic, · 78a6728c
      Linus Torvalds authored
      as it isn't even all that big.
      78a6728c
    • Petr Vandrovec's avatar
      [PATCH] missing argument to clear_user_page in v4l · c32ed714
      Petr Vandrovec authored
        David Mosberger added argument page to clear_user_page, but
      apparently did not scan whole tree to find callers. Please apply.
      It's the only such call in the non-arch specific portion of tree.
      c32ed714
  2. 31 May, 2002 16 commits
    • Martin Dalecki's avatar
      [PATCH] 2.5.19 IDE 77 · 77da0c5c
      Martin Dalecki authored
       - Get rid of SELECT_DRIVE macro. Start to move all direct hardware access
         functions in to one place.
      
       - Get rid of SELECT_MASK macro. Realize that the mask is always equal 0.
         Simplify the maskproc therefore.
      
       - Get rid of GET_STAT and OK_STAT macros as well.
      
       - hpt366 cleanups by Andrej Panin.
      
       - Artop driver update by Franz Sirl.
      77da0c5c
    • Linus Torvalds's avatar
      Merge bk://linuxusb.bkbits.net/linus-2.5 · c2a84d00
      Linus Torvalds authored
      into home.transmeta.com:/home/torvalds/v2.5/linux
      c2a84d00
    • Linus Torvalds's avatar
      Simplify tlb_flush_mmu() for exit case: makes it easier on the ia64 · 6188af0c
      Linus Torvalds authored
      folks, and the ARM people didn't mind.
      6188af0c
    • Linus Torvalds's avatar
      8334b2cd
    • Linus Torvalds's avatar
      Merge http://gkernel.bkbits.net/net-drivers-2.5 · 3f102da8
      Linus Torvalds authored
      into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux
      3f102da8
    • Javier Achirica's avatar
      airo wireless net driver updates: · 3ec5b5ab
      Javier Achirica authored
      * support latest wireless extensions
      * update locking to use semaphores
      3ec5b5ab
    • Jeff Garzik's avatar
      Merge mandrakesoft.com:/home/jgarzik/vanilla/linus-2.5 · 997ae224
      Jeff Garzik authored
      into mandrakesoft.com:/home/jgarzik/repo/net-drivers-2.5
      997ae224
    • David Nelson's avatar
      [PATCH] PATCH: USB Scanner Driver 0.4.8 and new maintainer · 27f49742
      David Nelson authored
      Here's my last and final patch to the maintainer of USB Scanner Driver.  Brian
      Beattie <beattie@beattie-home.net> is now going to assume this role (thanks
      Brian!).  Brian brings some kernel level programming so I'm sure he'll be able
      to conttribute to this list w/o any problems.  I want to thank you all for your
      support and help.  A couple of you sent some personal msgs regarding my
      departure - thank you.
      
      * 0.4.8  5/30/2002
       *    - Added Mustek BearPaw 2400 TA.  Thanks to Sergey
       *      Vlasov <vsu@mivlgu.murom.ru>.
       *    - Added Mustek 1200UB Plus and Mustek BearPaw 1200 CU ID's.  These use
       *      the Grandtech GT-6801 chip. Thanks to Henning
       *      Meier-Geinitz <henning@meier-geinitz.de>.
       *    - Increased Epson timeout to 60 secs as requested from
       *      Karl Heinz Kremer <khk@khk.net>.
       *    - Changed maintainership from David E. Nelson to Brian
       *      Beattie <beattie@beattie-home.net>.
      27f49742
    • David Brownell's avatar
      [PATCH] ehci remove warning if no CONFIG_USB_DEBUG · f6d68b3b
      David Brownell authored
      I just noticed a debug message will generate a needless warning
      when debugging is disabled.
      f6d68b3b
    • Greg Kroah-Hartman's avatar
      [PATCH] USB kernel-api documentation fix · e004e79e
      Greg Kroah-Hartman authored
      updated the kernel-api documentation USB files due to file reorg.
      e004e79e
    • David Mosberger's avatar
      [PATCH] agp support for i460 and zx1 cleanup · 7c165ccf
      David Mosberger authored
      The patch below adds first round of AGP support for the Intel 460
      chipset
      
      This won't actually build at the moment, but I think you prefer to
      merge things piecemeal, and this portion of the patch is almost
      guaranteed to be safe (affects only ia64).
      7c165ccf
    • Rusty Russell's avatar
      [PATCH] softirq.c per_cpu fix · e4086edc
      Rusty Russell authored
      GCC3.1 apparently gets confused about uninitialized sections
      e4086edc
    • David Mosberger's avatar
      [PATCH] pass "page" pointer to clear_user_page()/copy_user_page() · c583dc59
      David Mosberger authored
      Hi Linus,
      
      Are you willing to change the interfaces of clear_user_page() and
      copy_user_page() so that they can receive the relevant page pointer as
      a separate argument?  I need this on ia64 to implement the lazy-cache
      flushing scheme.
      
      I believe PPC would also benefit from this.
      
      	--david
      c583dc59
    • David Mosberger's avatar
      [PATCH] time-offset patch · 9d64273c
      David Mosberger authored
      On ia64 MP machines, we use the cycle counter register of each CPU to
      obtain fine-grained time-stamps.  At boot-time, we synchronize the
      counters as close as possible (similar to x86, though with a different
      algorithm).  But even with this synchronization, there is still a
      small (really: tiny) chance that a process bouncing from one CPU to
      another could observe time going backwards.  To guard against this, I
      maintain a global variable called "last_time_offset" which keeps track
      of the largest time-interpolation value returned so far.  Most of this
      is in platform-specific code (arch/ia64/kernel/time.c), but there are
      a handful of places in platform-independent code where this variable
      needs to be cleared to zero.  This is what the patch below does.  I
      didn't put it inside CONFIG_IA64 because I think this can be useful
      for other platforms, too.  I suppose I could put it inside CONFIG_SMP
      though this would make the code uglier.  If you think it's OK, please
      apply, otherwise, I'd appreciate your feedback.
      9d64273c
    • David Mosberger's avatar
      [PATCH] trivial keyboard driver patch · 5d29ce55
      David Mosberger authored
      This makes it possible to run the ia64 kernel both on platforms with the
      legacy keyboard controller and those without (as is the case for the hp
      zx1 platform, for example).  The new code is inside #ifdef CONFIG_IA64,
      though it would probably be a good idea to enable it unconditionally.
      The patch is by Alex Williamson.
      5d29ce55
    • Linus Torvalds's avatar
      Merge bk://ppc.bkbits.net/for-linus-ppc64 · cde6bc97
      Linus Torvalds authored
      into penguin.transmeta.com:/home/penguin/torvalds/repositories/kernel/linux
      cde6bc97
  3. 01 Jun, 2002 3 commits