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{ "id": 815479, "url": "http://patchwork.ozlabs.org/api/covers/815479/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20170919115055.19278-1-jgross@suse.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20170919115055.19278-1-jgross@suse.com>", "list_archive_url": null, "date": "2017-09-19T11:50:53", "name": "[0/2] xen: fix gnttab handling with old dom0 kernels", "submitter": { "id": 64874, "url": "http://patchwork.ozlabs.org/api/people/64874/?format=api", "name": "Jürgen Groß", "email": "jgross@suse.com" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20170919115055.19278-1-jgross@suse.com/mbox/", "series": [ { "id": 3854, "url": "http://patchwork.ozlabs.org/api/series/3854/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=3854", "date": "2017-09-19T11:50:55", "name": "xen: fix gnttab handling with old dom0 kernels", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/3854/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/815479/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": "ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=<UNKNOWN>)", "Received": [ "from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xxLql6fTKz9s7m\n\tfor <incoming@patchwork.ozlabs.org>;\n\tTue, 19 Sep 2017 21:53:39 +1000 (AEST)", "from localhost ([::1]:41955 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1duH5u-0003xM-32\n\tfor incoming@patchwork.ozlabs.org; Tue, 19 Sep 2017 07:53:38 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:36327)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <jgross@suse.com>) id 1duH3U-0002CH-E8\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:51:09 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <jgross@suse.com>) id 1duH3R-0006BU-DH\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:51:08 -0400", "from mx2.suse.de ([195.135.220.15]:47666 helo=mx1.suse.de)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from <jgross@suse.com>) id 1duH3R-0006AF-6R\n\tfor qemu-devel@nongnu.org; Tue, 19 Sep 2017 07:51:05 -0400", "from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254])\n\tby mx1.suse.de (Postfix) with ESMTP id C99885CBBE;\n\tTue, 19 Sep 2017 11:51:02 +0000 (UTC)" ], "X-Virus-Scanned": "by amavisd-new at test-mx.suse.de", "From": "Juergen Gross <jgross@suse.com>", "To": "qemu-devel@nongnu.org,\n\txen-devel@lists.xenproject.org", "Date": "Tue, 19 Sep 2017 13:50:53 +0200", "Message-Id": "<20170919115055.19278-1-jgross@suse.com>", "X-Mailer": "git-send-email 2.12.3", "X-detected-operating-system": "by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no\n\ttimestamps) [generic] [fuzzy]", "X-Received-From": "195.135.220.15", "Subject": "[Qemu-devel] [PATCH 0/2] xen: fix gnttab handling with old dom0\n\tkernels", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://lists.nongnu.org/archive/html/qemu-devel/>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "anthony.perard@citrix.com, Juergen Gross <jgross@suse.com>,\n\tsstabellini@kernel.org, kraxel@redhat.com", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "Trying to start a domain with a qdisk backend on an old dom0 kernel\n(non-pvops xen kernel) will fail as xengnttab_set_max_grants() will\nsucceed only if called directly after opening the gnttab device.\n\nThese two patches address the issue by:\n\n- moving the test for availability of xengnttab_grant_copy() from\n the qdisk backend to generic backend handling in order to not have\n to issue the grant copy ioctl with the qdisk specific file handle\n- opening the gnttab device in blk_connect() only in order to\n guarantee xengnttab_set_max_grants() is called just after opening\n the gnttab device\n\n\nJuergen Gross (2):\n xen: add a global indicator for grant copy being available\n xen: dont try setting max grants multiple times\n\n hw/block/xen_disk.c | 30 +++++++++++++++++-------------\n hw/xen/xen_backend.c | 11 +++++++++++\n include/hw/xen/xen_backend.h | 1 +\n 3 files changed, 29 insertions(+), 13 deletions(-)" }