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authorJens Axboe <axboe@fb.com>2017-01-18 15:37:27 -0700
committerJens Axboe <axboe@fb.com>2017-01-18 15:37:27 -0700
commit38dbb7dd4db184da4d2673f4bb963f7006465c37 (patch)
tree7d34184c97b07d1aed08731fff17dad9efbbcdf1 /block/elevator.c
parent6c0ca7ae292adea09b8bdd33a524bb9326c3e989 (diff)
downloadlinux-0-day-38dbb7dd4db184da4d2673f4bb963f7006465c37.tar.gz
blk-cgroup: don't quiesce the queue on policy activate/deactivate
There's no potential harm in quiescing the queue, but it also doesn't buy us anything. And we can't run the queue async for policy deactivate, since we could be in the path of tearing the queue down. If we schedule an async run of the queue at that time, we're racing with queue teardown AFTER having we've already torn most of it down. Reported-by: Omar Sandoval <osandov@fb.com> Fixes: 4d199c6f1c84 ("blk-cgroup: ensure that we clear the stop bit on quiesced queues") Tested-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/elevator.c')
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