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authorLinus Torvalds <torvalds@linux-foundation.org>2021-04-17 02:18:53 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-17 02:18:53 +0300
commit9cdbf6467424045617cd6e79dcaad06bb8efa31c (patch)
tree7d9fd167cf16408c1dbb4e0f71b3bc60ad1b09c0 /fs/io_uring.c
parent151501160401e2dc669ea7dac2c599b53f220c33 (diff)
parentc7d95613c7d6e003969722a290397b8271bdad17 (diff)
downloadlinux-9cdbf6467424045617cd6e79dcaad06bb8efa31c.tar.xz
Merge tag 'io_uring-5.12-2021-04-16' of git://git.kernel.dk/linux-block
Pull io_uring fix from Jens Axboe: "Fix for a potential hang at exit with SQPOLL from Pavel" * tag 'io_uring-5.12-2021-04-16' of git://git.kernel.dk/linux-block: io_uring: fix early sqd_list removal sqpoll hangs
Diffstat (limited to 'fs/io_uring.c')
-rw-r--r--fs/io_uring.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c
index bd14327c8e7e..dff34975d86b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6754,6 +6754,9 @@ static int io_sq_thread(void *data)
current->flags |= PF_NO_SETAFFINITY;
mutex_lock(&sqd->lock);
+ /* a user may had exited before the thread started */
+ io_run_task_work_head(&sqd->park_task_work);
+
while (!test_bit(IO_SQ_THREAD_SHOULD_STOP, &sqd->state)) {
int ret;
bool cap_entries, sqt_spin, needs_sched;
@@ -6770,10 +6773,10 @@ static int io_sq_thread(void *data)
}
cond_resched();
mutex_lock(&sqd->lock);
- if (did_sig)
- break;
io_run_task_work();
io_run_task_work_head(&sqd->park_task_work);
+ if (did_sig)
+ break;
timeout = jiffies + sqd->sq_thread_idle;
continue;
}