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Subject[PATCH AUTOSEL 5.2 13/76] rq-qos: set ourself TASK_UNINTERRUPTIBLE after we schedule
Date
From: Josef Bacik <josef@toxicpanda.com>

[ Upstream commit d14a9b389a86a5154b704bc88ce8dd37c701456a ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
block/blk-rq-qos.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/block/blk-rq-qos.c b/block/blk-rq-qos.c
index e5d75280b431e..e3ab75e4df9ea 100644
--- a/block/blk-rq-qos.c
+++ b/block/blk-rq-qos.c
@@ -261,6 +261,7 @@ 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);
}
--
2.20.1
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