Messages in this thread | | | Subject | Re: [PATCH 09/16] blk-mq: cache request hardware queue mapping | From | Hannes Reinecke <> | Date | Thu, 1 Nov 2018 10:27:16 +0100 |
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On 10/30/18 7:32 PM, Jens Axboe wrote: > We call blk_mq_map_queue() a lot, at least two times for each > request per IO, sometimes more. Since we now have an indirect > call as well in that function. cache the mapping so we don't > have to re-call blk_mq_map_queue() for the same request > multiple times. > > Signed-off-by: Jens Axboe <axboe@kernel.dk> > --- > block/blk-flush.c | 12 ++++-------- > block/blk-mq-debugfs.c | 4 +--- > block/blk-mq-sched.c | 6 ++---- > block/blk-mq-tag.c | 9 +-------- > block/blk-mq.c | 22 +++++++++------------- > block/blk-mq.h | 5 +---- > include/linux/blkdev.h | 1 + > 7 files changed, 19 insertions(+), 40 deletions(-) > Hehe. I had been wondering about this since the original mq implementation, but was told not to worry :-)
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cheers,
Hannes
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