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| author |   Jens Axboe <axboe@kernel.dk> | 2019-09-19 09:48:55 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-09-19 09:49:26 -0600 |
| commit | 9831a90ce64362f8429e8fd23838a9db2cdf7803 (patch) | |
| tree | 3a5155b8748a40c289426b56b04d36fe8b0b379d /fs/io_uring.c | |
| parent | io_uring: fix potential crash issue due to io_get_req failure (diff) | |
| download | linux-dev-9831a90ce64362f8429e8fd23838a9db2cdf7803.tar.xz linux-dev-9831a90ce64362f8429e8fd23838a9db2cdf7803.zip | |
io_uring: use cond_resched() in sqthread
If preempt isn't enabled in the kernel, we can run into hang issues with
sqthread submissions. Use cond_resched() to play nice instead of
cpu_relax(), if we end up starting the loop and not having any events
pending for submissions.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io_uring.c')
| -rw-r--r-- | fs/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 854dedd885fa..05a299e80159 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -2438,7 +2438,7 @@ static int io_sq_thread(void *data) * to sleep. */ if (inflight || !time_after(jiffies, timeout)) { - cpu_relax(); + cond_resched(); continue; } |