Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762662AbYFGQM1 (ORCPT ); Sat, 7 Jun 2008 12:12:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759829AbYFGQMT (ORCPT ); Sat, 7 Jun 2008 12:12:19 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:36988 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760281AbYFGQMS (ORCPT ); Sat, 7 Jun 2008 12:12:18 -0400 Subject: Re: [patch part 2] Re: [patch] Re: PostgreSQL pgbench performance regression in 2.6.23+ From: Peter Zijlstra To: Mike Galbraith Cc: Greg Smith , Ingo Molnar , Dhaval Giani , lkml , Srivatsa Vaddagiri In-Reply-To: <1212850447.4668.10.camel@marge.simson.net> References: <1211440207.5733.8.camel@marge.simson.net> <20080522082814.GA4499@linux.vnet.ibm.com> <1211447105.4823.7.camel@marge.simson.net> <1211452465.7606.8.camel@marge.simson.net> <1211455553.4381.9.camel@marge.simson.net> <1211456659.29104.20.camel@twins> <1211458176.5693.6.camel@marge.simson.net> <1211459081.29104.40.camel@twins> <1211536814.5851.18.camel@marge.simson.net> <20080523101000.GA13964@elte.hu> <1211537717.5851.22.camel@marge.simson.net> <1211586407.4786.5.camel@marge.simson.net> <1211867950.5505.47.camel@marge.simson.net> <1212732780.13981.43.camel@marge.simson.net> <1212838682.5571.6.camel@marge.simson.net> <1212844084.19205.85.camel@lappy.programming.kicks-ass.net> <1212850447.4668.10.camel@marge.simson.net> Content-Type: text/plain Date: Sat, 07 Jun 2008 18:12:00 +0200 Message-Id: <1212855120.19205.91.camel@lappy.programming.kicks-ass.net> Mime-Version: 1.0 X-Mailer: Evolution 2.22.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 693 Lines: 19 On Sat, 2008-06-07 at 16:54 +0200, Mike Galbraith wrote: > On Sat, 2008-06-07 at 15:08 +0200, Peter Zijlstra wrote: > > On Sat, 2008-06-07 at 13:38 +0200, Mike Galbraith wrote: > > > > Interesting.. Looks good. > > In that case it _might_ fly, so needs changelog and blame line. Just wondering, how much effect does the last_preempter stuff have?, it seems to me the minimum runtime check ought to throttle these wakeups quite a bit as well. -- 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/