Re: frequent lockups in 3.18rc4

From: DÃniel Fraga
Date: Tue Dec 02 2014 - 12:16:27 EST


On Tue, 2 Dec 2014 09:08:53 -0800
Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

> So just to verify:
>
> Without CONFIG_PREEMPT, things work well for you?

Yes.

> But with CONFIG_PREEMPT, you are able to create the rcu_sched stalls
> both with and without CONFIG_TREE_PREEMPT_RCU?
>
> Correct?

Yes, correct. And without CONFIG_TREE_PREEMPT_RCU it's
much harder to trigger the bug.

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