Eric Lee / smarc-fsl-linux-kernel

22 Dec, 2010

1 commit

  • a6fa6fae4   btrfs: Add lzo compression support ... Browse Code »

    Lzo is a much faster compression algorithm than gzib, so would allow
    more users to enable transparent compression, and some users can
    choose from compression ratio and speed for different applications

    Usage:

    # mount -t btrfs -o compress[=] dev /mnt
    or
    # mount -t btrfs -o compress-force[=] dev /mnt

    "-o compress" without argument is still allowed for compatability.

    Compatibility:

    If we mount a filesystem with lzo compression, it will not be able be
    mounted in old kernels. One reason is, otherwise btrfs will directly
    dump compressed data, which sits in inline extent, to user.

    Performance:

    The test copied a linux source tarball (~400M) from an ext4 partition
    to the btrfs partition, and then extracted it.

    (time in second)
    lzo zlib nocompress
    copy: 10.6 21.7 14.9
    extract: 70.1 94.4 66.6

    (data size in MB)
    lzo zlib nocompress
    copy: 185.87 108.69 394.49
    extract: 193.80 132.36 381.21

    Changelog:

    v1 -> v2:
    - Select LZO_COMPRESS and LZO_DECOMPRESS in btrfs Kconfig.
    - Add incompability flag.
    - Fix error handling in compress code.

    Signed-off-by: Li Zefan

    Li Zefan
     

18 Dec, 2009

1 commit

  • b6e3224fb   Revert "task_struct: make journal_info conditional" ... Browse Code »

    This reverts commit e4c570c4cb7a95dbfafa3d016d2739bf3fdfe319, as
    requested by Alexey:

    "I think I gave a good enough arguments to not merge it.
    To iterate:
    * patch makes impossible to start using ext3 on EXT3_FS=n kernels
    without reboot.
    * this is done only for one pointer on task_struct"

    None of config options which define task_struct are tristate directly
    or effectively."

    Requested-by: Alexey Dobriyan
    Acked-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Linus Torvalds
     

16 Dec, 2009

1 commit

  • e4c570c4c   task_struct: make journal_info conditional ... Browse Code »

    journal_info in task_struct is used in journaling file system only. So
    introduce CONFIG_FS_JOURNAL_INFO and make it conditional.

    Signed-off-by: Hiroshi Shimamoto
    Cc: Chris Mason
    Cc: "Theodore Ts'o"
    Cc: Steven Whitehouse
    Cc: KONISHI Ryusuke
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Hiroshi Shimamoto
     

04 Feb, 2009

1 commit

  • bef62ef33   Btrfs: make btrfs acls selectable ... Browse Code »

    This patch adds a menu entry to kconfig to enable acls for btrfs.
    This allows you to enable FS_POSIX_ACL at kernel compile time.

    (updated by Jeff Mahoney to make the changes in fs/btrfs/Kconfig instead)

    Signed-off-by: Christian Hesse
    Signed-off-by: Jeff Mahoney

    Christian Hesse
     

22 Jan, 2009

1 commit