Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756920Ab1E3MSJ (ORCPT ); Mon, 30 May 2011 08:18:09 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:57334 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752885Ab1E3MSH (ORCPT ); Mon, 30 May 2011 08:18:07 -0400 Date: Mon, 30 May 2011 14:17:59 +0200 From: Ingo Molnar To: Peter Zijlstra Cc: Damien Wyart , Mike Galbraith , linux-kernel@vger.kernel.org, paulmck Subject: Re: Very high CPU load when idle with 3.0-rc1 Message-ID: <20110530121759.GI22324@elte.hu> References: <20110530055924.GA9169@brouette> <1306755291.1200.2872.camel@twins> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1306755291.1200.2872.camel@twins> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.3.1 -2.0 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 645 Lines: 19 * Peter Zijlstra wrote: > The problem that patch tried to address is that the RCU threads > could stay in UNINTERRUPTIBLE state for quite a while and > triggering the hung task detector due to on-demand wake-ups. and it's not just the hung task detector, but obviously also the load average itself that would be skewed in this original bug case as well. Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/