Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510Ab0KJCiH (ORCPT ); Tue, 9 Nov 2010 21:38:07 -0500 Received: from mail-qw0-f46.google.com ([209.85.216.46]:58825 "EHLO mail-qw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751552Ab0KJCiD (ORCPT ); Tue, 9 Nov 2010 21:38:03 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; b=RJLTTL4IGUCPq9oEYJPahuz20BjA+LJ4kCXFxw6pjIRfeUg6bbSjk3Aq2SE+kCcT2L ba6BNjsnKOtXiMVzeh+ezcYtOLcLHlWKoIU2a2KniJ85AEqTMXGNltlhNYnPnUcLIqvm gUuNGVlOBPFg6NDMf8B6JA1oCk79CjbGxIu5s= Date: Tue, 9 Nov 2010 21:37:56 -0500 From: tmhikaru@gmail.com To: Peter Zijlstra Cc: Kyle McMartin , Venkatesh Pallipadi , Damien Wyart , Chase Douglas , Ingo Molnar , tmhikaru@gmail.com, Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: High CPU load when machine is idle (related to PROBLEM: Unusually high load average when idle in 2.6.35, 2.6.35.1 and later) Message-ID: <20101110023755.GB27340@roll> References: <1287788622-25860-1-git-send-email-venki@google.com> <1288001573.15336.52.camel@twins> <1288097074.15336.211.camel@twins> <1288101958.15336.284.camel@twins> <1288381343.1988.12.camel@laptop> <20101109185516.GQ8332@bombadil.infradead.org> <1289329348.2191.69.camel@laptop> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="8NvZYKFJsRX2Djef" Content-Disposition: inline In-Reply-To: <1289329348.2191.69.camel@laptop> User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2035 Lines: 59 --8NvZYKFJsRX2Djef Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 09, 2010 at 08:02:28PM +0100, Peter Zijlstra wrote: > On Tue, 2010-11-09 at 13:55 -0500, Kyle McMartin wrote: > > On Fri, Oct 29, 2010 at 09:42:23PM +0200, Peter Zijlstra wrote: > > >=20 > > > not tested other than compile, but how does that look...? > > >=20 > >=20 > > Hi Peter, > >=20 > > I finally got around to building a test kernel for a user who had been > > reporting this against F-14 (2.6.35) but they report there's not much > > improvement. > >=20 > > Sorry. :/ >=20 > Right, I tested it myself yesterday and got similar results. Does the > 'simple' patch from a few posts back work for people? >=20 > http://lkml.org/lkml/2010/10/26/150 >=20 > If that does work I fudged the fancy math, if that doesn't work either > we're back to square zero. I seem to remember someone saying this would only work on x86-64; if this is meant to work with a 32bit intel single core processor, please let me know - I'd like to try it. It would also help if I knew which kernel version this simpler patch is meant to apply to. Thank you, Tim McGrath --8NvZYKFJsRX2Djef Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEVAwUBTNoFg5EncCrqzVruAQISUgf+Ocl6ZGQEsJWtzDaWz0mbMMNOabJptFHf SpvfNo0GApqrQFXCQVt+OLYqf6+390JPRWOLCVwhfwyxeK5I59tnPQ2XY+wafton 65rpxxExHPTEL7WEXJJvvK2IpDcdqNaYKRVhWb5r0NZ7tWCCusALYNAoTTQcIAuO ++ycfD9rlbkpkKWg6qPhnuwmcsHre47k880xpzmVz9+dzdW6Ej8WY6whoVDhLCQm bwwHstjZrLtKMORc0EsOVB34MZT/t+vlaMpDF3PsTrH6CtkOwIvmYzLdpCm4cFLt LWqm04biSImDlL5IfqQBOScrwjwDh6RbWp1hz2vMeLlmaCTTD69JbA== =Busg -----END PGP SIGNATURE----- --8NvZYKFJsRX2Djef-- -- 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/