diff options
| author | Song Liu <songliubraving@fb.com> | 2021-09-07 16:03:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-26 14:09:01 +0200 |
| commit | 9a14014df72d00d87a199e1f77896f7ea62cc126 (patch) | |
| tree | 9f81f8d38c43aa8454b0f797aa3635178d4abc2f /kernel/debug | |
| parent | 23dfb959c6cbb8346a5143f44a970373fcb4ce8f (diff) | |
blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues
[ Upstream commit 7f2a6a69f7ced6db8220298e0497cf60482a9d4b ]
Limiting number of request to BLK_MAX_REQUEST_COUNT at blk_plug hurts
performance for large md arrays. [1] shows resync speed of md array drops
for md array with more than 16 HDDs.
Fix this by allowing more request at plug queue. The multiple_queue flag
is used to only apply higher limit to multiple queue cases.
[1] https://lore.kernel.org/linux-raid/CAFDAVznS71BXW8Jxv6k9dXc2iR3ysX3iZRBww_rzA8WifBFxGg@mail.gmail.com/
Tested-by: Marcin Wanat <marcin.wanat@gmail.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/debug')
0 files changed, 0 insertions, 0 deletions