From: Shaohua Li <shli@xxxxxx> Subject: 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@xxxxxx Signed-off-by: Shaohua Li <shli@xxxxxx> Cc: Petr Mladek <pmladek@xxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: Oleg Nesterov <oleg@xxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/kthread.c | 1 + 1 file changed, 1 insertion(+) diff -puN kernel/kthread.c~kthread_worker-dont-hog-the-cpu kernel/kthread.c --- a/kernel/kthread.c~kthread_worker-dont-hog-the-cpu +++ a/kernel/kthread.c @@ -637,6 +637,7 @@ repeat: schedule(); try_to_freeze(); + cond_resched(); goto repeat; } EXPORT_SYMBOL_GPL(kthread_worker_fn); _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
