scsi: implement .get_budget and .put_budget for blk-mq

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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>

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Ming Lei 2017-10-14 17:22:32 +08:00 • committed by Jens Axboe

parent aeec77629a

commit 0df21c86bd

1 changed files with 52 additions and 23 deletions

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drivers/scsi/scsi_lib.c

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