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rq-qos: set ourself TASK_UNINTERRUPTIBLE after we schedule
author
Josef Bacik
<josef@toxicpanda.com>
Tue, 16 Jul 2019 20:19:28 +0000
(16:19 -0400)
committer
Jens Axboe
<axboe@kernel.dk>
Thu, 18 Jul 2019 16:20:13 +0000
(10:20 -0600)
In case we get a spurious wakeup we need to make sure to re-set
ourselves to TASK_UNINTERRUPTIBLE so we don't busy wait.
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-rq-qos.c
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diff --git
a/block/blk-rq-qos.c
b/block/blk-rq-qos.c
index
69a0f0b
..
c450b89
100644
(file)
--- a/
block/blk-rq-qos.c
+++ b/
block/blk-rq-qos.c
@@
-262,6
+262,7
@@
void rq_qos_wait(struct rq_wait *rqw, void *private_data,
}
io_schedule();
has_sleeper = true;
+ set_current_state(TASK_UNINTERRUPTIBLE);
} while (1);
finish_wait(&rqw->wait, &data.wq);
}