Commit 22cf8bc6 authored Aug 31, 2017 by Shaohua Li Committed by Linus Torvalds Aug 31, 2017

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>

parent e746bf73

kernel/kthread.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -637,6 +637,7 @@ int kthread_worker_fn(void *worker_ptr)
		schedule();

		try_to_freeze();
		cond_resched();
		goto repeat;
		}
		EXPORT_SYMBOL_GPL(kthread_worker_fn);