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    Subject[PATCH 0/3] ocfs2: add nowait aio support
    Date
    As you know, VFS layer has introduced non-block aio
    flag IOCB_NOWAIT, which informs kernel to bail out
    if an AIO request will block for reasons such as file
    allocations, or a writeback triggered, or would block
    while allocating requests while performing direct I/O.
    Subsequent, pwritev2/preadv2 also can leverage this
    part kernel code.
    So far, ext4/xfs/btrfs have supported this feature,
    I'd like to add the related code for ocfs2 file system.

    Gang He (3):
    ocfs2: add ocfs2_try_rw_lock and ocfs2_try_inode_lock
    ocfs2: add ocfs2_overwrite_io function
    ocfs2: nowait aio support

    fs/ocfs2/dir.c | 2 +-
    fs/ocfs2/dlmglue.c | 42 ++++++++++++++++++++++++----
    fs/ocfs2/dlmglue.h | 6 +++-
    fs/ocfs2/extent_map.c | 67 +++++++++++++++++++++++++++++++++++++++++++++
    fs/ocfs2/extent_map.h | 3 ++
    fs/ocfs2/file.c | 74 +++++++++++++++++++++++++++++++++++++-------------
    fs/ocfs2/mmap.c | 2 +-
    fs/ocfs2/ocfs2_trace.h | 10 ++++---
    8 files changed, 175 insertions(+), 31 deletions(-)

    --
    1.8.5.6

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