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| author | Shaohua Li <shli@fb.com> | 2017-08-31 16:15:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-08-31 16:33:15 -0700 |
| commit | 22cf8bc6cb0d48c6d31da8eccbd4201ab9b0c4c6 (patch) | |
| tree | d6378366b52388c6e473af901cb82be7903bd577 /kernel/kthread.c | |
| parent | e746bf730a76fe53b82c9e6b6da72d58e9ae3565 (diff) | |
| download | lwn-22cf8bc6cb0d48c6d31da8eccbd4201ab9b0c4c6.tar.gz lwn-22cf8bc6cb0d48c6d31da8eccbd4201ab9b0c4c6.zip | |
kernel/kthread.c: kthread_worker: don't hog the cpu
If the worker thread continues getting work, it will hog the cpu and rcu
stall complains. Make it a good citizen. This is triggered in a loop
block device test.
Link: http://lkml.kernel.org/r/5de0a179b3184e1a2183fc503448b0269f24d75b.1503697127.git.shli@fb.com
Signed-off-by: Shaohua Li <shli@fb.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index 26db528c1d88..1c19edf82427 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -637,6 +637,7 @@ repeat: schedule(); try_to_freeze(); + cond_resched(); goto repeat; } EXPORT_SYMBOL_GPL(kthread_worker_fn); |