| commit | 6be96d3ad34a124450028dabba43f07fe1d0c86d | [log] [tgz] |
|---|---|---|
| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | Tue Jun 20 07:05:44 2017 -0500 |
| committer | Jens Axboe <axboe@kernel.dk> | Tue Jun 20 07:12:03 2017 -0600 |
| tree | a5f6ef95a01e38caa3dc1e50071d5baa78426a3f | |
| parent | b745fafaf70c0a98a2e1e7ac8cb14542889ceb0e [diff] |
fs: return if direct I/O will trigger writeback Find out if the I/O will trigger a wait due to writeback. If yes, return -EAGAIN. Return -EINVAL for buffered AIO: there are multiple causes of delay such as page locks, dirty throttling logic, page loading from disk etc. which cannot be taken care of. 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>