Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031718AbXEDVsF (ORCPT ); Fri, 4 May 2007 17:48:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031721AbXEDVsF (ORCPT ); Fri, 4 May 2007 17:48:05 -0400 Received: from smtp1.linux-foundation.org ([65.172.181.25]:39508 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031720AbXEDVsC (ORCPT ); Fri, 4 May 2007 17:48:02 -0400 Date: Fri, 4 May 2007 14:47:56 -0700 From: Andrew Morton To: Christoph Lameter Cc: linux-kernel@vger.kernel.org Subject: Re: Remove constructor from buffer_head Message-Id: <20070504144756.90d3b41d.akpm@linux-foundation.org> In-Reply-To: References: <20070504134212.c18d2d65.akpm@linux-foundation.org> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 659 Lines: 18 On Fri, 4 May 2007 14:42:02 -0700 (PDT) Christoph Lameter wrote: > On Fri, 4 May 2007, Andrew Morton wrote: > > > So the patch took the average system time from 4.42 seconds up to 4.582 > > seconds. Nice slowdown! > > All of that from a memset and a list head init on a cacheline we already > use? Seems unlikely, especially when you consider all the other stuff which a write() has to do. - 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/