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Revert "blk-rq-qos: remove redundant finish_wait to rq_qos_wait." 

This reverts commit 826f2f48da.

Qian Cai reports that this commit causes stalls with swap. Revert until
the reason can be figured out.

Reported-by: Qian Cai <cai@lca.pw>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-07-15 09:33:37 -06:00
parent d0f0f1b4c5
commit e791ee6885
1 changed files with 2 additions and 0 deletions
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block/blk-rq-qos.c
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@ -273,6 +273,8 @@ void rq_qos_wait(struct rq_wait *rqw, void *private_data,
if (data.got_token)
break;
if (!has_sleeper && acquire_inflight_cb(rqw, private_data)) {
finish_wait(&rqw->wait, &data.wq);
/*
* We raced with wbt_wake_function() getting a token,
* which means we now have two. Put our local token