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| author | Paolo Valente <paolo.valente@linaro.org> | 2019-01-29 12:06:35 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-01-31 12:50:24 -0700 |
| commit | a3c92560324bd616deaecb6842b2a0337a80ad8b (patch) | |
| tree | 7cf2e0a7b0e83f82d4faf9dd8d0762795303d68c /ipc/msgutil.c | |
| parent | 9dee8b3b057e1da26f85f1842f2aaf3bb200fb94 (diff) | |
| download | linux-stable-a3c92560324bd616deaecb6842b2a0337a80ad8b.tar.gz linux-stable-a3c92560324bd616deaecb6842b2a0337a80ad8b.tar.bz2 linux-stable-a3c92560324bd616deaecb6842b2a0337a80ad8b.zip | |
block, bfq: reduce threshold for detecting command queueing
bfq simple heuristic from cfq for detecting whether the drive performs
command queueing: check whether the average number of in-flight requests
is above a given threshold. Unfortunately this heuristic does fail to
detect queueing (on drives with queueing) if processes doing I/O are few
and issue I/O with a low depth.
To reduce false negatives, this commit lowers the threshold.
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'ipc/msgutil.c')
0 files changed, 0 insertions, 0 deletions