diff options
| author | Goldwyn Rodrigues <[email protected]> | 2017-06-20 07:05:44 -0500 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2017-06-20 07:12:03 -0600 |
| commit | 6be96d3ad34a124450028dabba43f07fe1d0c86d (patch) | |
| tree | a5f6ef95a01e38caa3dc1e50071d5baa78426a3f /tools/perf/scripts/python/call-graph-from-sql.py | |
| 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 <[email protected]>
Reviewed-by: Jan Kara <[email protected]>
Signed-off-by: Goldwyn Rodrigues <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions