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scsi: implement .get_budget and .put_budget for blk-mq
authorMing Lei <ming.lei@redhat.com>
Sat, 14 Oct 2017 09:22:32 +0000 (17:22 +0800)
committerJens Axboe <axboe@kernel.dk>
Wed, 1 Nov 2017 14:20:02 +0000 (08:20 -0600)
commit3af949b7b8da5df0b5ac0ec0f9d4bbe036d7caca
treea035d2c2b35dc838006ef6b85201ae2bc86b2d10tree | snapshot
parentc5a5eb07a186a039adb6a607fc571e39cfa2dd28commit | diff
scsi: implement .get_budget and .put_budget for blk-mq

We need to tell blk-mq to reserve resources before queuing one request,
so implement these two callbacks. Then blk-mq can avoid to dequeue
request too early, and IO merging can be improved a lot.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
drivers/scsi/scsi_lib.c diff | blob | history
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