Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933097AbbBBKnt (ORCPT ); Mon, 2 Feb 2015 05:43:49 -0500 Received: from smtp02.citrix.com ([66.165.176.63]:8167 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753550AbbBBKns (ORCPT ); Mon, 2 Feb 2015 05:43:48 -0500 X-IronPort-AV: E=Sophos;i="5.09,505,1418083200"; d="scan'208";a="223479219" Message-ID: <54CF54CB.70008@citrix.com> Date: Mon, 2 Feb 2015 10:43:23 +0000 From: =?windows-1252?Q?Roger_Pau_Monn=E9?= User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Bob Liu , CC: , , , , Subject: Re: [PATCH 2/2] drivers: xen/block: add multi-page ring support References: <1422008071-27643-1-git-send-email-bob.liu@oracle.com> <1422008071-27643-2-git-send-email-bob.liu@oracle.com> In-Reply-To: <1422008071-27643-2-git-send-email-bob.liu@oracle.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1005 Lines: 24 El 23/01/15 a les 10.14, Bob Liu ha escrit: > Extend xen/block to support multi-page ring. > * xen-blkback notify blkfront with feature-multi-ring-pages > * xen-blkfront write to xenstore about how many pages are used as the ring > > If using 4 pages as the ring, inflight requests inscreased from 32 to 128 and > IOPS improved nearly 400% on our system. > > Signed-off-by: Bob Liu > --- > drivers/block/xen-blkback/xenbus.c | 86 +++++++++++++++++++++++++-------- > drivers/block/xen-blkfront.c | 94 ++++++++++++++++++++++++++---------- This requires a patch to xen/include/public/io/blkif.h in the Xen repository describing how this protocol extension is going to work before reviewing the Linux implementation. Roger. -- 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/