Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759329AbZJGO2b (ORCPT ); Wed, 7 Oct 2009 10:28:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759235AbZJGO2b (ORCPT ); Wed, 7 Oct 2009 10:28:31 -0400 Received: from smtp2.ultrahosting.com ([74.213.174.253]:41601 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1759268AbZJGO2a (ORCPT ); Wed, 7 Oct 2009 10:28:30 -0400 Date: Wed, 7 Oct 2009 10:21:12 -0400 (EDT) From: Christoph Lameter X-X-Sender: cl@gentwo.org To: Peter Zijlstra cc: Mathieu Desnoyers , akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Pekka Enberg , Tejun Heo , Mel Gorman , mingo@elte.hu Subject: Re: [this_cpu_xx V5 19/19] SLUB: Experimental new fastpath w/o interrupt disable In-Reply-To: <1254920460.26976.241.camel@twins> Message-ID: References: <20091006233654.815079668@gentwo.org> <20091006233733.153341605@gentwo.org> <20091007025440.GB4664@Krystal> <1254906707.26976.225.camel@twins> <20091007124628.GB27363@Krystal> <1254920460.26976.241.camel@twins> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 689 Lines: 17 On Wed, 7 Oct 2009, Peter Zijlstra wrote: > On Wed, 2009-10-07 at 08:46 -0400, Mathieu Desnoyers wrote: > > * local_irq_restore > > -> the interrupt line is low. The scheduler won't be called. There is > > no preempt_check_resched() call. > > That would be an issue with all irq disable sections, so I don't think > this is actually true. This was not true in the past... News to me that an irq enable would not be a scheduling point. -- 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/