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| author | Goldwyn Rodrigues | 2017-06-20 14:05:43 +0200 |
|---|---|---|
| committer | Jens Axboe | 2017-06-20 15:12:03 +0200 |
| commit | b745fafaf70c0a98a2e1e7ac8cb14542889ceb0e (patch) | |
| tree | 10a7b6f647945c63f17c6d55c346e84d99130ac3 /mm/filemap.c | |
| parent | fs: Use RWF_* flags for AIO operations (diff) | |
| download | kernel-qcow2-linux-b745fafaf70c0a98a2e1e7ac8cb14542889ceb0e.tar.gz kernel-qcow2-linux-b745fafaf70c0a98a2e1e7ac8cb14542889ceb0e.tar.xz kernel-qcow2-linux-b745fafaf70c0a98a2e1e7ac8cb14542889ceb0e.zip | |
fs: Introduce RWF_NOWAIT and FMODE_AIO_NOWAIT
RWF_NOWAIT 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.
RWF_NOWAIT is translated to IOCB_NOWAIT for iocb->ki_flags.
FMODE_AIO_NOWAIT is a flag which identifies the file opened is capable
of returning -EAGAIN if the AIO call will block. This must be set by
supporting filesystems in the ->open() call.
Filesystems xfs, btrfs and ext4 would be supported in the following patches.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'mm/filemap.c')
0 files changed, 0 insertions, 0 deletions