Messages in this thread | | | From | Gang He <> | Subject | [PATCH v4 0/3] ocfs2: add nowait aio support | Date | Mon, 15 Jan 2018 17:08:00 +0800 |
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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.
Compare with v3, modify the check condition for nowait in ocfs2_file_write_iter() function. second, add direct-io and nowait combination check in ocfs2_file_read_iter() function. Compare with v2, do some modification in ocfs2_overwrite_io() function for OCFS2_INLINE_DATA_FL case. Compare with v1, some changes are as below, use osb pointer in ocfs2_try_rw_lock() function, modify ocfs2_overwrite_io() function to make all error value can be returned to the upper code, move invoking ocfs2_overwrite_io() function from ocfs2_file_write_iter() to ocfs2_prepare_inode_for_write(), this change can combine acquiring the related locks.
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 | 41 +++++++++++++++++--- fs/ocfs2/dlmglue.h | 6 ++- fs/ocfs2/extent_map.c | 45 ++++++++++++++++++++++ fs/ocfs2/extent_map.h | 3 ++ fs/ocfs2/file.c | 101 +++++++++++++++++++++++++++++++++++++++---------- fs/ocfs2/mmap.c | 2 +- fs/ocfs2/ocfs2_trace.h | 10 +++-- 8 files changed, 177 insertions(+), 33 deletions(-)
-- 1.8.5.6
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