From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754157Ab1AaOQv (ORCPT ); Mon, 31 Jan 2011 09:16:51 -0500 Received: from casper.infradead.org ([85.118.1.10]:55531 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751498Ab1AaOQv (ORCPT ); Mon, 31 Jan 2011 09:16:51 -0500 Subject: Re: [PATCH] a patch to fix the cpu-offline-online problem caused by pm_idle From: Peter Zijlstra To: Luming Yu Cc: LKML , Len Brown , "H. Peter Anvin" , tglx In-Reply-To: References: <1295894492.28776.470.camel@laptop> <1295946736.28776.479.camel@laptop> <1296210619.15234.263.camel@laptop> <1296405366.2274.60.camel@twins> <1296469006.15234.359.camel@laptop> Content-Type: text/plain; charset="UTF-8" Date: Mon, 31 Jan 2011 15:17:47 +0100 Message-ID: <1296483467.26581.26.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2011-01-31 at 09:10 -0500, Luming Yu wrote: > > My understanding is if the heart of the problem is triggered by some > hardware defects. > And we could have no other clean option than a solution I proposed > here. Well, a cleaner option is to limit NHM-EX hardware to C1 and simply dis-allow anything deeper on it. > Yes, I agree before say yes to a "workaround", we need to understand > exactly what those side effects are. I will try to do research on all > side effects caused by the ipi and c3 latency to tickless and highres > kernel after one week vacation starting from Feb 1st. > OK, great! and enjoy your time away from the computer ;-)