Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934082AbYBHB35 (ORCPT ); Thu, 7 Feb 2008 20:29:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756612AbYBHB3t (ORCPT ); Thu, 7 Feb 2008 20:29:49 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:45533 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754952AbYBHB3s (ORCPT ); Thu, 7 Feb 2008 20:29:48 -0500 Date: Thu, 7 Feb 2008 17:28:30 -0800 (PST) From: Linus Torvalds To: David Miller cc: mingo@elte.hu, jens.axboe@oracle.com, linux-kernel@vger.kernel.org, Alan.Brunelle@hp.com, arjan@linux.intel.com, dgc@sgi.com, npiggin@suse.de, akpm@linux-foundation.org, vegard.nossum@gmail.com, penberg@gmail.com Subject: Re: [patch] block layer: kmemcheck fixes In-Reply-To: <20080207.172246.31415231.davem@davemloft.net> Message-ID: References: <20080207103136.GG15220@kernel.dk> <20080207104901.GF16735@elte.hu> <20080207.172246.31415231.davem@davemloft.net> User-Agent: Alpine 1.00 (LFD 882 2007-12-20) 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: 803 Lines: 22 On Thu, 7 Feb 2008, David Miller wrote: > > Maybe cpus these days have so much store bandwith that doing > things like the above is OK, but I doubt it :-) I seriously doubt the same is true for the IO requests (which are different anyway, and tend to happen at a much lower frequency than high-speed networking). I also suspect that your timings were very hardware-dependent in the first place (and yes, the long-term effect is likely working against that "optimization"), and depend a lot on just how sparse the initialization can to be. Linus -- 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/