1. 30 Oct, 2009 7 commits
  2. 12 Nov, 2009 2 commits
  3. 13 Nov, 2009 1 commit
  4. 12 Nov, 2009 4 commits
    • Albin Tonnerre's avatar
      - changes to ach/arch/boot/Makefile to make it easier to add new · 16877336
      Albin Tonnerre authored
         compression types
       - new piggy.lzo.S necessary for lzo compression
       - changes in arch/arm/boot/compressed/misc.c to allow the use of lzo or
         gzip, depending on the config
       - Kconfig support
      Signed-off-by: default avatarAlbin Tonnerre <albin.tonnerre@free-electrons.com>
      Tested-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      16877336
    • Andrew Morton's avatar
      Cc: "H. Peter Anvin" <hpa@zytor.com> · af866bdc
      Andrew Morton authored
      Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wu Zhangjin <wuzhangjin@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      af866bdc
    • Andrew Morton's avatar
      ERROR: that open brace { should be on the previous line · 6ca15ba2
      Andrew Morton authored
      #184: FILE: lib/decompress_unlzo.c:48:
      +static const unsigned char lzop_magic[] =
      +	{ 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a };
      
      WARNING: line over 80 characters
      #254: FILE: lib/decompress_unlzo.c:118:
      +		error("Both input pointer and fill function provided, don't know what to do");
      
      WARNING: line over 80 characters
      #259: FILE: lib/decompress_unlzo.c:123:
      +		error("NULL input pointer and missing position pointer or fill function");
      
      WARNING: line over 80 characters
      #313: FILE: lib/decompress_unlzo.c:177:
      +		r = lzo1x_decompress_safe((u8 *) in_buf, src_len, out_buf, &tmp);
      
      total: 1 errors, 3 warnings, 291 lines checked
      
      ./patches/lib-add-support-for-lzo-compressed-kernels.patch has style problems, please review.  If any of these errors
      are false positives report them to the maintainer, see
      CHECKPATCH in MAINTAINERS.
      
      Please run checkpatch prior to sending patches
      
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wu Zhangjin <wuzhangjin@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      6ca15ba2
    • Albin Tonnerre's avatar
      This patch series adds generic support for creating and extracting · efca0bcd
      Albin Tonnerre authored
      LZO-compressed kernel images, as well as support for using such images on
      the x86 and ARM architectures, and support for creating and using
      LZO-compressed initrd and initramfs images.
      
      
      
      This patch:
      
      The lzo compressor is worse than gzip at compression, but faster at
      extraction.  Here are some figures for an ARM board I'm working on:
      
      Uncompressed size: 3.24Mo
      gzip  1.61Mo 0.72s
      lzo   1.75Mo 0.48s
      
      So for a compression ratio that is still relatively close to gzip, it's
      much faster to extract, at least in that case.
      
      This part contains:
       - Makefile routine to support lzo compression
       - Fixes to the existing lzo compressor so that it can be used in
         compressed kernels
       - wrapper around the existing lzo1x_decompress, as it only extracts one
         block at a time, while we need to extract a whole file here
       - config dialog for kernel compression
      Signed-off-by: default avatarAlbin Tonnerre <albin.tonnerre@free-electrons.com>
      Tested-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      efca0bcd
  5. 13 Nov, 2009 3 commits
    • Andrew Morton's avatar
      ERROR: code indent should use tabs where possible · db812467
      Andrew Morton authored
      #90: FILE: lib/zlib_inflate/inffast.c:250:
      +                    /* minimum length is three */$
      
      ERROR: space prohibited before that close parenthesis ')'
      #97: FILE: lib/zlib_inflate/inffast.c:257:
      +		    if (dist > 2 ) {
      
      WARNING: suspect code indent for conditional statements (24, 28)
      #111: FILE: lib/zlib_inflate/inffast.c:271:
      +			if (dist == 1)
      [...]
      +			    pat16 = (pat16 & 0xff) | ((pat16 & 0xff ) << 8);
      
      ERROR: space prohibited before that close parenthesis ')'
      #113: FILE: lib/zlib_inflate/inffast.c:273:
      +			    pat16 = (pat16 & 0xff) | ((pat16 & 0xff ) << 8);
      
      ERROR: space prohibited before that close parenthesis ')'
      #115: FILE: lib/zlib_inflate/inffast.c:275:
      +			    pat16 = (pat16 & 0xff00) | ((pat16 & 0xff00 ) >> 8);
      
      total: 4 errors, 1 warnings, 93 lines checked
      
      ./patches/zlib-optimize-inffast-when-copying-direct-from-output.patch has style problems, please review.  If any of these errors
      are false positives report them to the maintainer, see
      CHECKPATCH in MAINTAINERS.
      
      Please run checkpatch prior to sending patches
      
      Cc: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      db812467
    • Joakim Tjernlund's avatar
      JFFS2 uses lesser compression ratio and inflate always ends up in "copy · 9dad9789
      Joakim Tjernlund authored
      direct from output" case.
      
      This patch tries to optimize the direct copy procedure.  Uses
      get_unaligned() but only in one place.
      
      The copy loop just above this one can also use this optimization, but I
      havn't done so as I have not tested if it is a win there too.
      
      On my MPC8321 this is about 17% faster on my JFFS2 root FS than the
      original.
      Signed-off-by: default avatarJoakim Tjernlund <Joakim.Tjernlund@transmode.se>
      Cc: Roel Kluin <roel.kluin@gmail.com>
      Cc: Richard Purdie <rpurdie@rpsys.net>
      Cc: David Woodhouse <dwmw2@infradead.org>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      9dad9789
    • Akinobu Mita's avatar
      Use hweight8 instead of counting for each bit · 1e8e2e80
      Akinobu Mita authored
      Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
      Acked-by: default avatarAnders Larsen <al@alarsen.net>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      1e8e2e80
  6. 10 Oct, 2009 1 commit
  7. 12 Nov, 2009 1 commit
  8. 10 Nov, 2009 2 commits
    • Andrew Morton's avatar
      ERROR: space prohibited before that close parenthesis ')' · f78370af
      Andrew Morton authored
      #252: FILE: fs/direct-io.c:1212:
      +			if (end > isize )
      
      total: 1 errors, 0 warnings, 338 lines checked
      
      ./patches/direct-io-cleanup-blockdev_direct_io-locking.patch has style problems, please review.  If any of these errors
      are false positives report them to the maintainer, see
      CHECKPATCH in MAINTAINERS.
      
      Please run checkpatch prior to sending patches
      
      Cc: Christoph Hellwig <hch@lst.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      f78370af
    • Christoph Hellwig's avatar
      Currently the locking in blockdev_direct_IO is a mess, we have three · b3c9569b
      Christoph Hellwig authored
      different locking types and very confusing checks for some of them.  The
      most complicated one is DIO_OWN_LOCKING for reads, which happens to not
      actually be used.
      
      This patch gets rid of the DIO_OWN_LOCKING - as mentioned above the read
      case is unused anyway, and the write side is almost identical to
      DIO_NO_LOCKING.  The difference is that DIO_NO_LOCKING always sets the
      create argument for the get_blocks callback to zero, but we can easily
      move that to the actual get_blocks callbacks.  There are four users of the
      DIO_NO_LOCKING mode: gfs already ignores the create argument and thus is
      fine with the new version, ocfs2 only errors out if create were ever set,
      and we can remove this dead code now, the block device code only ever uses
      create for an error message if we are fully beyond the device which can
      never happen, and last but not least XFS will need the new behavour for
      writes.
      
      Now we can replace the lock_type variable with a flags one, where no flag
      means the DIO_NO_LOCKING behaviour and DIO_LOCKING is kept as the first
      flag.  Separate out the check for not allowing to fill holes into a
      separate flag, although for now both flags always get set at the same
      time.
      
      Also revamp the documentation of the locking scheme to actually make
      sense.
      Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
      Cc: Dave Chinner <david@fromorbit.com>
      Cc: Badari Pulavarty <pbadari@us.ibm.com>
      Cc: Jeff Moyer <jmoyer@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Cc: Zach Brown <zach.brown@oracle.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: Alex Elder <aelder@sgi.com>
      Cc: Mark Fasheh <mfasheh@suse.com>
      Cc: Joel Becker <joel.becker@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      b3c9569b
  9. 30 Oct, 2009 2 commits
    • Andrew Morton's avatar
      Cc: Jeff Moyer <jmoyer@redhat.com> · f0a477b3
      Andrew Morton authored
      Cc: Zach Brown <zach.brown@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      f0a477b3
    • Jeff Moyer's avatar
      Intel reported a performance regression caused by the following commit: · b7f890ec
      Jeff Moyer authored
      commit 848c4dd5
      Author: Zach Brown <zach.brown@oracle.com>
      Date:   Mon Aug 20 17:12:01 2007 -0700
      
          dio: zero struct dio with kzalloc instead of manually
      
          This patch uses kzalloc to zero all of struct dio rather than
          manually trying to track which fields we rely on being zero.  It
          passed aio+dio stress testing and some bug regression testing on
          ext3.
      
          This patch was introduced by Linus in the conversation that lead up
          to Badari's minimal fix to manually zero .map_bh.b_state in commit:
      
            6a648fa7
      
          It makes the code a bit smaller.  Maybe a couple fewer cachelines to
          load, if we're lucky:
      
             text    data     bss     dec     hex filename
          3285925  568506 1304616 5159047  4eb887 vmlinux
          3285797  568506 1304616 5158919  4eb807 vmlinux.patched
      
          I was unable to measure a stable difference in the number of cpu
          cycles spent in blockdev_direct_IO() when pushing aio+dio 256K reads
          at ~340MB/s.
      
          So the resulting intent of the patch isn't a performance gain but to
          avoid exposing ourselves to the risk of finding another field like
          .map_bh.b_state where we rely on zeroing but don't enforce it in the
          code.
      
      Zach surmised that zeroing out the page array was what caused most of
      the problem, and suggested the approach taken in the attached patch for
      resolving the issue.  Intel re-tested with this patch and saw a 0.6%
      performance gain (the original regression was 0.5%).
      Signed-off-by: default avatarJeff Moyer <jmoyer@redhat.com>
      Acked-by: default avatarZach Brown <zach.brown@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      b7f890ec
  10. 13 Nov, 2009 2 commits
  11. 14 Oct, 2009 1 commit
  12. 11 Nov, 2009 1 commit
  13. 30 Sep, 2009 3 commits
  14. 13 Nov, 2009 2 commits
    • Karel Zak's avatar
      The size of EFI GPT header is not static, but whole sector is · dbd508a2
      Karel Zak authored
      allocated for the header. The HeaderSize field must be greater
      than 92 (= sizeof(struct gpt_header) and must be less than or
      equal to the logical block size.
      
      It means we have to read whole sector with the header, because the
      header crc32 checksum is calculated according to HeaderSize.
      
      For more details see UEFI standard (version 2.3, May 2009):
        - 5.3.1 GUID Format overview, page 93
        - Table 13. GUID Partition Table Header, page 96
      Signed-off-by: default avatarKarel Zak <kzak@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      dbd508a2
    • Karel Zak's avatar
      Currently, kernel uses strictly 512-byte sectors for EFI GPT parsing. · 58213974
      Karel Zak authored
      That's wrong.
      
      UEFI standard (version 2.3, May 2009, 5.3.1 GUID Format overview, page
      95) defines that LBA is always based on the logical block size. It
      means bdev_logical_block_size() (aka BLKSSZGET) for Linux.
      
      This patch removes static sector size from EFI GPT parser.
      
      The problem is reproducible with the latest GNU Parted:
      
       # modprobe scsi_debug dev_size_mb=50 sector_size=4096
      
        # ./parted /dev/sdb print
        Model: Linux scsi_debug (scsi)
        Disk /dev/sdb: 52.4MB
        Sector size (logical/physical): 4096B/4096B
        Partition Table: gpt
      
        Number  Start   End     Size    File system  Name     Flags
         1      24.6kB  3002kB  2978kB               primary
         2      3002kB  6001kB  2998kB               primary
         3      6001kB  9003kB  3002kB               primary
      
        # blockdev --rereadpt /dev/sdb
        # dmesg | tail -1
         sdb: unknown partition table      <---- !!!
      
      with this patch:
      
        # blockdev --rereadpt /dev/sdb
        # dmesg | tail -1
         sdb: sdb1 sdb2 sdb3
      Signed-off-by: default avatarKarel Zak <kzak@redhat.com>
      Cc: Jens Axboe <jens.axboe@oracle.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      58213974
  15. 12 Nov, 2009 1 commit
  16. 16 Oct, 2009 1 commit
  17. 09 Oct, 2009 1 commit
  18. 30 Sep, 2009 1 commit
  19. 24 Aug, 2009 1 commit
  20. 11 Nov, 2009 1 commit
  21. 29 Sep, 2009 1 commit
  22. 11 Nov, 2009 1 commit
    • Manfred Spraul's avatar
      If multiple simple decrements on the same semaphore are pending, then the · ffd26648
      Manfred Spraul authored
      current code scans all decrement operations, even if the semaphore value
      is already 0.
      
      The patch optimizes that: if the semaphore value is 0, then there is no
      need to scan the q->alter entries.
      
      Note that this is a common case: It happens if 100 decrements by one are
      pending and now an increment by one increases the semaphore value from 0
      to 1.  Without this patch, all 100 entries are scanned.  With the patch,
      only one entry is scanned, then woken up.  Then the new rule triggers and
      the scanning is aborted, without looking at the remaining 99 tasks.
      
      With this patch, single sop increment/decrement by 1 are now O(1).
      (same as with Nick's patch)
      Signed-off-by: default avatarManfred Spraul <manfred@colorfullife.com>
      Cc: Nick Piggin <npiggin@suse.de>
      Cc: Pierre Peiffer <peifferp@gmail.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      ffd26648