Re: [PATCH] cpuidle: Fix the CPU stuck at C0 for 2-3s after PM_QOS back to DEFAULT

From: Peter Zijlstra
Date: Thu Aug 14 2014 - 09:13:24 EST

On Thu, Aug 14, 2014 at 11:24:06AM +0000, Liu, Chuansheng wrote:
> If inspecting the polling flag, we can not fix the race between poll_idle and smp_callback,
> since in poll_idle(), before set polling flag, if the smp_callback come in, then no resched bit set,
> after that, poll_idle() will do the polling action, without reselection immediately, it will bring power
> regression here.

-ENOPARSE. Is there a question there?

Attachment: pgp_Dr1Z4KKFA.pgp
Description: PGP signature