diff options
| author | Ming Lei <[email protected]> | 2017-10-14 17:22:25 +0800 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2017-11-01 08:20:02 -0600 |
| commit | 5e3d02bbafad38975099b5848f5ebadedcf7bb7e (patch) | |
| tree | 165fcba950a2f17a88639cf3251e660c3844f889 /tools/perf/scripts/python/bin | |
| parent | 0e7d3a8d4ec3f662faa7ef7f2957459b33f2481d (diff) | |
blk-mq-sched: dispatch from scheduler IFF progress is made in ->dispatch
When the hw queue is busy, we shouldn't take requests from the scheduler
queue any more, otherwise it is difficult to do IO merge.
This patch fixes the awful IO performance on some SCSI devices(lpfc,
qla2xxx, ...) when mq-deadline/kyber is used by not taking requests if
hw queue is busy.
Reviewed-by: Omar Sandoval <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Ming Lei <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/bin')
0 files changed, 0 insertions, 0 deletions