Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754107AbbETO5F (ORCPT ); Wed, 20 May 2015 10:57:05 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:54496 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752331AbbETO5B (ORCPT ); Wed, 20 May 2015 10:57:01 -0400 X-IronPort-AV: E=Sophos;i="5.13,464,1427760000"; d="scan'208";a="266919193" Message-ID: <555CA0B9.9050108@citrix.com> Date: Wed, 20 May 2015 16:56:57 +0200 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/31.6.0 MIME-Version: 1.0 To: Julien Grall , Bob Liu , CC: , , , Subject: Re: [Xen-devel] [PATCH v4 2/2] xen/block: add multi-page ring support References: <1432127422-6797-1-git-send-email-bob.liu@oracle.com> <1432127422-6797-2-git-send-email-bob.liu@oracle.com> <555C8A3D.9010105@citrix.com> In-Reply-To: <555C8A3D.9010105@citrix.com> Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-DLP: MIA1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1503 Lines: 38 El 20/05/15 a les 15.21, Julien Grall ha escrit: > Hi, > > On 20/05/15 14:10, Bob Liu wrote: >> --- >> drivers/block/xen-blkback/blkback.c | 12 ++++ >> drivers/block/xen-blkback/common.h | 3 +- >> drivers/block/xen-blkback/xenbus.c | 85 +++++++++++++++++++++------- >> drivers/block/xen-blkfront.c | 110 ++++++++++++++++++++++++++---------- >> 4 files changed, 161 insertions(+), 49 deletions(-) >> >> diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c >> index 713fc9f..057890f 100644 >> --- a/drivers/block/xen-blkback/blkback.c >> +++ b/drivers/block/xen-blkback/blkback.c >> @@ -84,6 +84,12 @@ MODULE_PARM_DESC(max_persistent_grants, >> "Maximum number of grants to map persistently"); >> >> /* >> + * Maximum number of pages to be used as the ring between front and backend >> + */ >> +unsigned int xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER; > > We will soon support 64KB page granularity with ARM64, although the PV > protocol will keep a 4KB page granularity. > > Can you clarify with granularity is used here? The one of the host or > the one of the PV protocol? It's using 4K pages, because those are then granted to the domain handling the backend. 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/