Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763026AbXLMTEW (ORCPT ); Thu, 13 Dec 2007 14:04:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754486AbXLMTEF (ORCPT ); Thu, 13 Dec 2007 14:04:05 -0500 Received: from rtr.ca ([76.10.145.34]:4366 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753418AbXLMTEB (ORCPT ); Thu, 13 Dec 2007 14:04:01 -0500 Message-ID: <4761821F.3050602@rtr.ca> Date: Thu, 13 Dec 2007 14:03:59 -0500 From: Mark Lord User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: Matthew Wilcox Cc: Jens Axboe , IDE/ATA development list , Linux Kernel , linux-scsi Subject: Re: QUEUE_FLAG_CLUSTER: not working in 2.6.24 ? References: <47617B92.6020908@rtr.ca> <47617C07.3020501@rtr.ca> <47617E72.6080504@rtr.ca> <20071213185326.GQ26334@parisc-linux.org> In-Reply-To: <20071213185326.GQ26334@parisc-linux.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 826 Lines: 22 Matthew Wilcox wrote: > On Thu, Dec 13, 2007 at 01:48:18PM -0500, Mark Lord wrote: >> Problem confirmed. 2.6.23.8 regularly generates segments up to 64KB for >> libata, >> but 2.6.24 uses only 4KB segments and a *few* 8KB segments. > > Just a suspicion ... could this be slab vs slub? ie check your configs > are the same / similar between the two kernels. .. Mmmm.. a good thought, that one. But I just rechecked, and both have CONFIG_SLAB=y My guess is that something got changed around when Jens reworked the block layer for 2.6.24. I'm going to dig around in there now. -- 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/