From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753380AbZEYIQB (ORCPT ); Mon, 25 May 2009 04:16:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753603AbZEYIPp (ORCPT ); Mon, 25 May 2009 04:15:45 -0400 Received: from mail-bw0-f174.google.com ([209.85.218.174]:48050 "EHLO mail-bw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751759AbZEYIPm (ORCPT ); Mon, 25 May 2009 04:15:42 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=hB7BsnDJrBOgElRehhJ1Q39BOjZKBWlRYew+F5N+pqpCiVdnrAu1aAfKGD6tzJIwAb uY5adsXTVE0q/dOFLFo3qhCbQIqvzwf0U+x1MMqxigkaAm5LbnbG3Fxw0hbathgA2m37 bm86fUvZkWNoWb3TTj5wGJ8Xd86dEVZ+87+/8= MIME-Version: 1.0 In-Reply-To: <1243236668-3398-6-git-send-email-jens.axboe@oracle.com> References: <1243236668-3398-1-git-send-email-jens.axboe@oracle.com> <1243236668-3398-6-git-send-email-jens.axboe@oracle.com> Date: Mon, 25 May 2009 11:15:42 +0300 X-Google-Sender-Auth: 65f8252e3c7bc85f Message-ID: <84144f020905250115m1dffb51er51f8f339ab58a704@mail.gmail.com> Subject: Re: [PATCH 03/13] scsi: unify allocation of scsi command and sense buffer From: Pekka Enberg To: Jens Axboe Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, chris.mason@oracle.com, david@fromorbit.com, hch@infradead.org, akpm@linux-foundation.org, jack@suse.cz, yanmin_zhang@linux.intel.com, Christoph Lameter , Matthew Wilcox , Nick Piggin Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, May 25, 2009 at 10:30 AM, Jens Axboe wrote: > Fold the sense buffer into the command, thereby eliminating a slab > allocation and free per command. > > Signed-off-by: Jens Axboe Interesting. I wonder how this affects the SLAB vs. SLUB regression people are seeing on high end machines in OLTP benchmarks. Pekka