Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757029AbXHUXvZ (ORCPT ); Tue, 21 Aug 2007 19:51:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758151AbXHUXvQ (ORCPT ); Tue, 21 Aug 2007 19:51:16 -0400 Received: from netops-testserver-4-out.sgi.com ([192.48.171.29]:60953 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757219AbXHUXvP (ORCPT ); Tue, 21 Aug 2007 19:51:15 -0400 Date: Tue, 21 Aug 2007 16:51:14 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Mathieu Desnoyers cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, mingo@redhat.com Subject: Re: [PATCH] SLUB use cmpxchg_local In-Reply-To: <20070821234702.GE29691@Krystal> Message-ID: References: <20070820212922.GA27011@Krystal> <20070820215413.GA28452@Krystal> <20070821173849.GA8360@Krystal> <20070821231216.GA29691@Krystal> <20070821233938.GD29691@Krystal> <20070821234702.GE29691@Krystal> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 668 Lines: 20 On Tue, 21 Aug 2007, Mathieu Desnoyers wrote: > Are you running a UP or SMP kernel ? If you run a UP kernel, the > cmpxchg_local and cmpxchg are identical. UP. > Oh, and if you run your tests at boot time, the alternatives code may > have removed the lock prefix, therefore making cmpxchg and cmpxchg_local > exactly the same. Tests were run at boot time. That still does not explain kmalloc not showing improvements. - 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/