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(parent: 5b72727) | patch
blk-mq-sched: make completed_request() callback more useful
authorOmar Sandoval <osandov@fb.com>
Fri, 14 Apr 2017 08:00:01 +0000 (01:00 -0700)
committerJens Axboe <axboe@fb.com>
Fri, 14 Apr 2017 20:06:57 +0000 (14:06 -0600)
commitc05f8525f67b7d6489b0502211d4ed35622d9beb
treefe474e51721e497374bbf6e674f883e54138e699tree | snapshot (tar.gz zip)
parent5b72727299307e53888277729f980ab03264dac8commit | diff
blk-mq-sched: make completed_request() callback more useful

Currently, this callback is called right after put_request() and has no
distinguishable purpose. Instead, let's call it before put_request() as
soon as I/O has completed on the request, before we account it in
blk-stat. With this, Kyber can enable stats when it sees a latency
outlier and make sure the outlier gets accounted.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
block/blk-mq-sched.h diff | blob | blame | history
block/blk-mq.c diff | blob | blame | history
include/linux/elevator.h diff | blob | blame | history