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    Subject[PATCH RFC] ext3 data=guarded v3
    Date
    Hello everyone,

    Here is another version of the data=guarded work for ext3. The main
    difference between this code and yesterday's is the guarded writepage
    function now sends any newly allocated block through the old data=ordered code.

    This is important because at the time we're walking the buffers, the page
    may be unlocked, so we can't trust anything inside the page. In general,
    any allocation done by writepage is to fill a hole, so the old data=ordered
    is what we want anyway.

    This passed a longer stress test and generally seems to be working. I
    don't think anyone would recommend it as a default for 2.6.30, but it
    may be a good idea to have a review party and decide if it is safe enough
    to include so people can experiment with it.

    Overall diffstat of the series:

    fs/buffer.c | 45 ++-
    fs/ext3/Makefile | 3
    fs/ext3/fsync.c | 12
    fs/ext3/inode.c | 546 +++++++++++++++++++++++++++++++++++++++++++-
    fs/ext3/namei.c | 3
    fs/ext3/ordered-data.c | 318 +++++++++++++++++++++++++
    fs/ext3/super.c | 48 +++
    fs/jbd/transaction.c | 1
    include/linux/buffer_head.h | 3
    include/linux/ext3_fs.h | 33 ++
    include/linux/ext3_fs_i.h | 44 +++
    include/linux/ext3_fs_sb.h | 6
    include/linux/ext3_jbd.h | 11
    include/linux/jbd.h | 10
    mm/filemap.c | 1

    -chris




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