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| author | Song Liu <[email protected]> | 2021-09-07 23:03:38 +0000 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2021-09-07 23:05:12 +0000 |
| commit | 7f2a6a69f7ced6db8220298e0497cf60482a9d4b (patch) | |
| tree | a0cd135c8be2a9327e124f5788057ff9d83b547a /scripts/clang-tools/gen_compile_commands.py | |
| parent | block: move fs/block_dev.c to block/bdev.c (diff) | |
| download | kernel-7f2a6a69f7ced6db8220298e0497cf60482a9d4b.tar.gz kernel-7f2a6a69f7ced6db8220298e0497cf60482a9d4b.zip | |
blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues
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 <[email protected]>
Signed-off-by: Song Liu <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'scripts/clang-tools/gen_compile_commands.py')
0 files changed, 0 insertions, 0 deletions