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GET /api/patches/45833/?format=api
http://patches.dpdk.org/api/patches/45833/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/patch/20181002093651.24795-16-maxime.coquelin@redhat.com/", "project": { "id": 1, "url": "http://patches.dpdk.org/api/projects/1/?format=api", "name": "DPDK", "link_name": "dpdk", "list_id": "dev.dpdk.org", "list_email": "dev@dpdk.org", "web_url": "http://core.dpdk.org", "scm_url": "git://dpdk.org/dpdk", "webscm_url": "http://git.dpdk.org/dpdk", "list_archive_url": "https://inbox.dpdk.org/dev", "list_archive_url_format": "https://inbox.dpdk.org/dev/{}", "commit_url_format": "" }, "msgid": "<20181002093651.24795-16-maxime.coquelin@redhat.com>", "list_archive_url": "https://inbox.dpdk.org/dev/20181002093651.24795-16-maxime.coquelin@redhat.com", "date": "2018-10-02T09:36:49", "name": "[v2,15/17] vhost: enable postcopy protocol feature", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": true, "hash": "64263565c30c1e3c29c03a2654728540d7adc898", "submitter": { "id": 512, "url": "http://patches.dpdk.org/api/people/512/?format=api", "name": "Maxime Coquelin", "email": "maxime.coquelin@redhat.com" }, "delegate": { "id": 2642, "url": "http://patches.dpdk.org/api/users/2642/?format=api", "username": "mcoquelin", "first_name": "Maxime", "last_name": "Coquelin", "email": "maxime.coquelin@redhat.com" }, "mbox": "http://patches.dpdk.org/project/dpdk/patch/20181002093651.24795-16-maxime.coquelin@redhat.com/mbox/", "series": [ { "id": 1630, "url": "http://patches.dpdk.org/api/series/1630/?format=api", "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=1630", "date": "2018-10-02T09:36:34", "name": "vhost: add postcopy live-migration support", "version": 2, "mbox": "http://patches.dpdk.org/series/1630/mbox/" } ], "comments": "http://patches.dpdk.org/api/patches/45833/comments/", "check": "success", "checks": "http://patches.dpdk.org/api/patches/45833/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<dev-bounces@dpdk.org>", "X-Original-To": "patchwork@dpdk.org", "Delivered-To": "patchwork@dpdk.org", "Received": [ "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id 92C915F0D;\n\tTue, 2 Oct 2018 11:38:44 +0200 (CEST)", "from mx1.redhat.com (mx1.redhat.com [209.132.183.28])\n\tby dpdk.org (Postfix) with ESMTP id 9AC305B36;\n\tTue, 2 Oct 2018 11:38:41 +0200 (CEST)", "from smtp.corp.redhat.com\n\t(int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id EFAF43084217;\n\tTue, 2 Oct 2018 09:38:40 +0000 (UTC)", "from localhost.localdomain (ovpn-112-50.ams2.redhat.com\n\t[10.36.112.50])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id E9C387944B;\n\tTue, 2 Oct 2018 09:38:37 +0000 (UTC)" ], "From": "Maxime Coquelin <maxime.coquelin@redhat.com>", "To": "dev@dpdk.org, tiwei.bie@intel.com, zhihong.wang@intel.com,\n\tjfreimann@redhat.com, nicknickolaev@gmail.com, i.maximets@samsung.com,\n\tbruce.richardson@intel.com, alejandro.lucero@netronome.com", "Cc": "dgilbert@redhat.com, stable@dpdk.org,\n\tMaxime Coquelin <maxime.coquelin@redhat.com>", "Date": "Tue, 2 Oct 2018 11:36:49 +0200", "Message-Id": "<20181002093651.24795-16-maxime.coquelin@redhat.com>", "In-Reply-To": "<20181002093651.24795-1-maxime.coquelin@redhat.com>", "References": "<20181002093651.24795-1-maxime.coquelin@redhat.com>", "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.16", "X-Greylist": "Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.40]); Tue, 02 Oct 2018 09:38:41 +0000 (UTC)", "Subject": "[dpdk-dev] [PATCH v2 15/17] vhost: enable postcopy protocol feature", "X-BeenThere": "dev@dpdk.org", "X-Mailman-Version": "2.1.15", "Precedence": "list", "List-Id": "DPDK patches and discussions <dev.dpdk.org>", "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>", "List-Archive": "<http://mails.dpdk.org/archives/dev/>", "List-Post": "<mailto:dev@dpdk.org>", "List-Help": "<mailto:dev-request@dpdk.org?subject=help>", "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>", "Errors-To": "dev-bounces@dpdk.org", "Sender": "\"dev\" <dev-bounces@dpdk.org>" }, "content": "Enable postcopy protocol feature except if dequeue\nzero-copy is enabled. In this case, guest memory requires\nto be populated, which is not compatible with userfaultfd.\n\nSigned-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>\nSigned-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n---\n lib/librte_vhost/vhost_user.c | 7 +++++++\n lib/librte_vhost/vhost_user.h | 3 ++-\n 2 files changed, 9 insertions(+), 1 deletion(-)", "diff": "diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c\nindex ee7337ac8..9d08f4af0 100644\n--- a/lib/librte_vhost/vhost_user.c\n+++ b/lib/librte_vhost/vhost_user.c\n@@ -1317,6 +1317,13 @@ vhost_user_get_protocol_features(struct virtio_net **pdev,\n \tif (!(features & (1ULL << VIRTIO_F_IOMMU_PLATFORM)))\n \t\tprotocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_REPLY_ACK);\n \n+\t/*\n+\t * If dequeue zerocopy is enabled, guest memory requires to be\n+\t * populated, which is not compatible with postcopy.\n+\t */\n+\tif (dev->dequeue_zero_copy)\n+\t\tprotocol_features &= ~(1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT);\n+\n \tmsg->payload.u64 = protocol_features;\n \tmsg->size = sizeof(msg->payload.u64);\n \tmsg->fd_num = 0;\ndiff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h\nindex 73b1fe2b9..dc97be843 100644\n--- a/lib/librte_vhost/vhost_user.h\n+++ b/lib/librte_vhost/vhost_user.h\n@@ -22,7 +22,8 @@\n \t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ) | \\\n \t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_CRYPTO_SESSION) | \\\n \t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD) | \\\n-\t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER))\n+\t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER) | \\\n+\t\t\t\t\t (1ULL << VHOST_USER_PROTOCOL_F_PAGEFAULT))\n \n typedef enum VhostUserRequest {\n \tVHOST_USER_NONE = 0,\n", "prefixes": [ "v2", "15/17" ] }{ "id": 45833, "url": "