Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754731AbZJHHu2 (ORCPT ); Thu, 8 Oct 2009 03:50:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754536AbZJHHu2 (ORCPT ); Thu, 8 Oct 2009 03:50:28 -0400 Received: from casper.infradead.org ([85.118.1.10]:37856 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754335AbZJHHu1 (ORCPT ); Thu, 8 Oct 2009 03:50:27 -0400 Subject: Re: [this_cpu_xx V5 19/19] SLUB: Experimental new fastpath w/o interrupt disable From: Peter Zijlstra To: Christoph Lameter Cc: Mathieu Desnoyers , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Pekka Enberg , Tejun Heo , Mel Gorman , mingo@elte.hu In-Reply-To: References: <20091006233654.815079668@gentwo.org> <20091006233733.153341605@gentwo.org> <20091007025440.GB4664@Krystal> <1254906707.26976.225.camel@twins> <20091007124628.GB27363@Krystal> <20091007150257.GA8508@Krystal> <20091007151940.GA10052@Krystal> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Thu, 08 Oct 2009 09:52:30 +0200 Message-Id: <1254988350.26976.256.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 646 Lines: 17 On Wed, 2009-10-07 at 11:21 -0400, Christoph Lameter wrote: > On Wed, 7 Oct 2009, Mathieu Desnoyers wrote: > > > You are already calling the scheduler when ending the _fast_ path. I > > don't see the problem with calling it when you end the slow path > > execution. > > Well yes that gives rise to the thought of using > > preempt_enable_no_sched() NACK, delaying the reschedule is not an option -- 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/