+ kthread_worker-dont-hog-the-cpu.patch added to -mm tree

+ kthread_worker-dont-hog-the-cpu.patch added to -mm tree

[akpm]

The patch titled
     Subject: kernel/kthread.c: kthread_worker: don't hog the cpu
has been added to the -mm tree.  Its filename is
     kthread_worker-dont-hog-the-cpu.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/kthread_worker-dont-hog-the-cpu.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/kthread_worker-dont-hog-the-cpu.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Shaohua Li <shli@fb.com>
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@fb.com
Signed-off-by: Shaohua Li <shli@fb.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
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>
---

 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);
_

Patches currently in -mm which might be from shli@fb.com are

kthread_worker-dont-hog-the-cpu.patch