Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932634AbZJHQY0 (ORCPT ); Thu, 8 Oct 2009 12:24:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932597AbZJHQYZ (ORCPT ); Thu, 8 Oct 2009 12:24:25 -0400 Received: from smtp2.ultrahosting.com ([74.213.174.253]:33857 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932579AbZJHQYY (ORCPT ); Thu, 8 Oct 2009 12:24:24 -0400 Date: Thu, 8 Oct 2009 12:17:32 -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: <1255006435.26976.309.camel@twins> Message-ID: References: <20091006233733.153341605@gentwo.org> <20091007025440.GB4664@Krystal> <1254906707.26976.225.camel@twins> <20091007124628.GB27363@Krystal> <20091007150257.GA8508@Krystal> <20091007151940.GA10052@Krystal> <1254988350.26976.256.camel@twins> <20091008124456.GA13307@Krystal> <1255006435.26976.309.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: 605 Lines: 17 On Thu, 8 Oct 2009, Peter Zijlstra wrote: > I just don't get why Christoph is getting all upset about the > need_resched() check in preempt_enable(), its still cheaper than poking > at the interrupt flags. Preempt causes too many performance issues. I keep on thinking that I could make it easier on people to use it. Guess I better leave it simple then. -- 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/