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{
    "id": 35163,
    "url": "http://patches.dpdk.org/api/patches/35163/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/1518580892-32656-5-git-send-email-jianfeng.tan@intel.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": "<1518580892-32656-5-git-send-email-jianfeng.tan@intel.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/1518580892-32656-5-git-send-email-jianfeng.tan@intel.com",
    "date": "2018-02-14T04:01:32",
    "name": "[dpdk-dev,4/4] vhost: avoid populate guest memory",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "fc6e2c4132721493355a73490fe7b636ff4186e0",
    "submitter": {
        "id": 313,
        "url": "http://patches.dpdk.org/api/people/313/?format=api",
        "name": "Jianfeng Tan",
        "email": "jianfeng.tan@intel.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/1518580892-32656-5-git-send-email-jianfeng.tan@intel.com/mbox/",
    "series": [],
    "comments": "http://patches.dpdk.org/api/patches/35163/comments/",
    "check": "success",
    "checks": "http://patches.dpdk.org/api/patches/35163/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 791521B33F;\n\tWed, 14 Feb 2018 04:59:54 +0100 (CET)",
            "from mga06.intel.com (mga06.intel.com [134.134.136.31])\n\tby dpdk.org (Postfix) with ESMTP id EEAB81B31B\n\tfor <dev@dpdk.org>; Wed, 14 Feb 2018 04:59:50 +0100 (CET)",
            "from orsmga002.jf.intel.com ([10.7.209.21])\n\tby orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;\n\t13 Feb 2018 19:59:50 -0800",
            "from dpdk06.sh.intel.com ([10.67.110.196])\n\tby orsmga002.jf.intel.com with ESMTP; 13 Feb 2018 19:59:49 -0800"
        ],
        "X-Amp-Result": "SKIPPED(no attachment in message)",
        "X-Amp-File-Uploaded": "False",
        "X-ExtLoop1": "1",
        "X-IronPort-AV": "E=Sophos;i=\"5.46,510,1511856000\"; d=\"scan'208\";a=\"34520071\"",
        "From": "Jianfeng Tan <jianfeng.tan@intel.com>",
        "To": "dev@dpdk.org",
        "Cc": "Jianfeng Tan <jianfeng.tan@intel.com>, maxime.coquelin@redhat.com,\n\tyliu@fridaylinux.org",
        "Date": "Wed, 14 Feb 2018 04:01:32 +0000",
        "Message-Id": "<1518580892-32656-5-git-send-email-jianfeng.tan@intel.com>",
        "X-Mailer": "git-send-email 2.7.4",
        "In-Reply-To": "<1518580892-32656-1-git-send-email-jianfeng.tan@intel.com>",
        "References": "<1518580892-32656-1-git-send-email-jianfeng.tan@intel.com>",
        "Subject": "[dpdk-dev] [PATCH 4/4] vhost: avoid populate guest memory",
        "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://dpdk.org/ml/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>",
        "List-Archive": "<http://dpdk.org/ml/archives/dev/>",
        "List-Post": "<mailto:dev@dpdk.org>",
        "List-Help": "<mailto:dev-request@dpdk.org?subject=help>",
        "List-Subscribe": "<https://dpdk.org/ml/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>"
    },
    "content": "It's not necessary to polulate guest memory from vhost side.\n\nCc: maxime.coquelin@redhat.com\nCc: yliu@fridaylinux.org\n\nSigned-off-by: Jianfeng Tan <jianfeng.tan@intel.com>\n---\n lib/librte_vhost/vhost_user.c | 4 +++-\n 1 file changed, 3 insertions(+), 1 deletion(-)",
    "diff": "diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c\nindex 90ed211..9bd0391 100644\n--- a/lib/librte_vhost/vhost_user.c\n+++ b/lib/librte_vhost/vhost_user.c\n@@ -644,6 +644,7 @@ vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)\n \tuint64_t mmap_offset;\n \tuint64_t alignment;\n \tuint32_t i;\n+\tint populate;\n \tint fd;\n \n \tif (dev->mem && !vhost_memory_changed(&memory, dev->mem)) {\n@@ -714,8 +715,9 @@ vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)\n \t\t}\n \t\tmmap_size = RTE_ALIGN_CEIL(mmap_size, alignment);\n \n+\t\tpopulate = (dev->dequeue_zero_copy) ? MAP_POPULATE : 0;\n \t\tmmap_addr = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,\n-\t\t\t\t MAP_SHARED | MAP_POPULATE, fd, 0);\n+\t\t\t\t MAP_SHARED | populate, fd, 0);\n \n \t\tif (mmap_addr == MAP_FAILED) {\n \t\t\tRTE_LOG(ERR, VHOST_CONFIG,\n",
    "prefixes": [
        "dpdk-dev",
        "4/4"
    ]
}