Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763376AbXKNSjl (ORCPT ); Wed, 14 Nov 2007 13:39:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758229AbXKNSjb (ORCPT ); Wed, 14 Nov 2007 13:39:31 -0500 Received: from smtp-outbound-1.vmware.com ([65.113.40.141]:47359 "EHLO smtp-outbound-1.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756343AbXKNSjb (ORCPT ); Wed, 14 Nov 2007 13:39:31 -0500 Date: Wed, 14 Nov 2007 10:39:30 -0800 From: Micah Dowty To: Cyrus Massoumi Cc: linux-kernel@vger.kernel.org Subject: Re: High priority tasks break SMP balancer? Message-ID: <20071114183929.GA9287@vmware.com> References: <20071109223417.GB16250@vmware.com> <4734F397.7080802@gmx.net> <20071110001103.GD16250@vmware.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071110001103.GD16250@vmware.com> User-Agent: Mutt/1.5.16 (2007-06-09) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 773 Lines: 19 On Fri, Nov 09, 2007 at 04:11:03PM -0800, Micah Dowty wrote: > It's also possible this problem doesn't occur on 2.6.17. I have only > tested this example on 2.6.23.1 and 2.6.20 so far. I tested a handful of kernel versions, and it looks like this is indeed the case. As far as I can tell, this problem was introduced between 2.6.19.7 and 2.6.20. Looking at the diff between those versions, it looks like there were some noteworthy changes to the SMP balancer. I'm still working on narrowing this down further. Thanks, --Micah - 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/