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GET /api/patches/54380/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 54380,
    "url": "http://patches.dpdk.org/api/patches/54380/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/20190605081005.15716-3-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": "<20190605081005.15716-3-maxime.coquelin@redhat.com>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20190605081005.15716-3-maxime.coquelin@redhat.com",
    "date": "2019-06-05T08:10:03",
    "name": "[v2,2/4] net/virtio: fix segmented packet issue in mergeable Rx path",
    "commit_ref": null,
    "pull_url": null,
    "state": "superseded",
    "archived": true,
    "hash": "67da6c02823d3bc2f6b44dbf0f2672b71b02bf97",
    "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/20190605081005.15716-3-maxime.coquelin@redhat.com/mbox/",
    "series": [
        {
            "id": 4899,
            "url": "http://patches.dpdk.org/api/series/4899/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=4899",
            "date": "2019-06-05T08:10:01",
            "name": "net/virtio: Fix packet segmentation bug",
            "version": 2,
            "mbox": "http://patches.dpdk.org/series/4899/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/54380/comments/",
    "check": "fail",
    "checks": "http://patches.dpdk.org/api/patches/54380/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "X-BeenThere": "dev@dpdk.org",
        "Return-Path": "<dev-bounces@dpdk.org>",
        "MIME-Version": "1.0",
        "Sender": "\"dev\" <dev-bounces@dpdk.org>",
        "From": "Maxime Coquelin <maxime.coquelin@redhat.com>",
        "To": "dev@dpdk.org, ybrustin@cisco.com, tiwei.bie@intel.com,\n\tjfreimann@redhat.com",
        "Delivered-To": "patchwork@dpdk.org",
        "List-Archive": "<http://mails.dpdk.org/archives/dev/>",
        "References": "<20190605081005.15716-1-maxime.coquelin@redhat.com>",
        "In-Reply-To": "<20190605081005.15716-1-maxime.coquelin@redhat.com>",
        "List-Subscribe": "<https://mails.dpdk.org/listinfo/dev>,\n\t<mailto:dev-request@dpdk.org?subject=subscribe>",
        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
        "X-Greylist": "Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.27]); Wed, 05 Jun 2019 08:10:22 +0000 (UTC)",
        "List-Unsubscribe": "<https://mails.dpdk.org/options/dev>,\n\t<mailto:dev-request@dpdk.org?subject=unsubscribe>",
        "Received": [
            "from [92.243.14.124] (localhost [127.0.0.1])\n\tby dpdk.org (Postfix) with ESMTP id CE0891B9B5;\n\tWed,  5 Jun 2019 10:10:27 +0200 (CEST)",
            "from mx1.redhat.com (mx1.redhat.com [209.132.183.28])\n\tby dpdk.org (Postfix) with ESMTP id 46DFE1B99B;\n\tWed,  5 Jun 2019 10:10:23 +0200 (CEST)",
            "from smtp.corp.redhat.com\n\t(int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13])\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 B0D887EBDC;\n\tWed,  5 Jun 2019 08:10:22 +0000 (UTC)",
            "from localhost.localdomain (ovpn-112-53.ams2.redhat.com\n\t[10.36.112.53])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id 0C7C860A35;\n\tWed,  5 Jun 2019 08:10:20 +0000 (UTC)"
        ],
        "X-Original-To": "patchwork@dpdk.org",
        "List-Post": "<mailto:dev@dpdk.org>",
        "Content-Transfer-Encoding": "8bit",
        "X-Scanned-By": "MIMEDefang 2.79 on 10.5.11.13",
        "X-Mailman-Version": "2.1.15",
        "List-Help": "<mailto:dev-request@dpdk.org?subject=help>",
        "Errors-To": "dev-bounces@dpdk.org",
        "Subject": "[dpdk-dev] [PATCH v2 2/4] net/virtio: fix segmented packet issue in\n\tmergeable Rx path",
        "Date": "Wed,  5 Jun 2019 10:10:03 +0200",
        "Message-Id": "<20190605081005.15716-3-maxime.coquelin@redhat.com>",
        "Cc": "stable@dpdk.org,\n\tMaxime Coquelin <maxime.coquelin@redhat.com>",
        "Precedence": "list"
    },
    "content": "After having dequeued a burst of descriptors, there may be a\nneed to dequeue a few more if the last packet was segmented\nand not complete. When it happens, the extra segments were\nnot properly attached to the mbuf chain, and so were lost.\n\nAlso, head segment data_len field is wrongly summed with\nthe length of all the segments of the chain.\n\nThis patch fixes both the mbuf chaining and head segment's\ndata_len field\n\nFixes: bcac5aa207f8 (\"net/virtio: improve batching in mergeable path\")\nCc: stable@dpdk.org\n\nReported-by: Yaroslav Brustinov <ybrustin@cisco.com>\nSigned-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>\n---\n drivers/net/virtio/virtio_rxtx.c | 4 +---\n 1 file changed, 1 insertion(+), 3 deletions(-)",
    "diff": "diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c\nindex 6b3baf0423..9469ecb743 100644\n--- a/drivers/net/virtio/virtio_rxtx.c\n+++ b/drivers/net/virtio/virtio_rxtx.c\n@@ -1614,7 +1614,7 @@ virtio_recv_mergeable_pkts(void *rx_queue,\n \tstruct virtqueue *vq = rxvq->vq;\n \tstruct virtio_hw *hw = vq->hw;\n \tstruct rte_mbuf *rxm;\n-\tstruct rte_mbuf *prev;\n+\tstruct rte_mbuf *prev = NULL;\n \tuint16_t nb_used, num, nb_rx = 0;\n \tuint32_t len[VIRTIO_MBUF_BURST_SZ];\n \tstruct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];\n@@ -1721,7 +1721,6 @@ virtio_recv_mergeable_pkts(void *rx_queue,\n \t\tuint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,\n \t\t\t\t\tVIRTIO_MBUF_BURST_SZ);\n \n-\t\tprev = rcv_pkts[nb_rx];\n \t\tif (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {\n \t\t\tvirtio_rmb(hw->weak_barriers);\n \t\t\tnum = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len,\n@@ -1738,7 +1737,6 @@ virtio_recv_mergeable_pkts(void *rx_queue,\n \t\t\t\tprev->next = rxm;\n \t\t\t\tprev = rxm;\n \t\t\t\trx_pkts[nb_rx]->pkt_len += len[extra_idx];\n-\t\t\t\trx_pkts[nb_rx]->data_len += len[extra_idx];\n \t\t\t\textra_idx += 1;\n \t\t\t};\n \t\t\tseg_res -= rcv_cnt;\n",
    "prefixes": [
        "v2",
        "2/4"
    ]
}