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{
    "id": 48554,
    "url": "http://patches.dpdk.org/api/patches/48554/?format=api",
    "web_url": "http://patches.dpdk.org/project/dpdk/patch/20181205221159.6336-3-stephen@networkplumber.org/",
    "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",
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    "msgid": "<20181205221159.6336-3-stephen@networkplumber.org>",
    "list_archive_url": "https://inbox.dpdk.org/dev/20181205221159.6336-3-stephen@networkplumber.org",
    "date": "2018-12-05T22:11:58",
    "name": "[v2,3/4] net/netvsc: disable multi-queue on older servers",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": true,
    "hash": "4a142936444f6251b77d6d7b54378a3f12e701d8",
    "submitter": {
        "id": 27,
        "url": "http://patches.dpdk.org/api/people/27/?format=api",
        "name": "Stephen Hemminger",
        "email": "stephen@networkplumber.org"
    },
    "delegate": {
        "id": 1,
        "url": "http://patches.dpdk.org/api/users/1/?format=api",
        "username": "tmonjalo",
        "first_name": "Thomas",
        "last_name": "Monjalon",
        "email": "thomas@monjalon.net"
    },
    "mbox": "http://patches.dpdk.org/project/dpdk/patch/20181205221159.6336-3-stephen@networkplumber.org/mbox/",
    "series": [
        {
            "id": 2679,
            "url": "http://patches.dpdk.org/api/series/2679/?format=api",
            "web_url": "http://patches.dpdk.org/project/dpdk/list/?series=2679",
            "date": "2018-12-05T22:11:56",
            "name": "[v2,1/4] bus/vmbus: fix race in sub channel creation",
            "version": 2,
            "mbox": "http://patches.dpdk.org/series/2679/mbox/"
        }
    ],
    "comments": "http://patches.dpdk.org/api/patches/48554/comments/",
    "check": "warning",
    "checks": "http://patches.dpdk.org/api/patches/48554/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<dev-bounces@dpdk.org>",
        "X-Original-To": "patchwork@dpdk.org",
        "Delivered-To": "patchwork@dpdk.org",
        "Received": [
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        ],
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        "X-Received": "by 2002:a62:61c3:: with SMTP id\n\tv186mr14828392pfb.55.1544047942102; \n\tWed, 05 Dec 2018 14:12:22 -0800 (PST)",
        "From": "Stephen Hemminger <stephen@networkplumber.org>",
        "To": "dev@dpdk.org",
        "Cc": "mgamal@redhat.com, Stephen Hemminger <stephen@networkplumber.org>,\n\tStephen Hemminger <sthemmin@microsoft.com>",
        "Date": "Wed,  5 Dec 2018 14:11:58 -0800",
        "Message-Id": "<20181205221159.6336-3-stephen@networkplumber.org>",
        "X-Mailer": "git-send-email 2.19.2",
        "In-Reply-To": "<20181205221159.6336-1-stephen@networkplumber.org>",
        "References": "<1543575881.5400.33.camel@redhat.com>\n\t<20181205221159.6336-1-stephen@networkplumber.org>",
        "MIME-Version": "1.0",
        "Content-Transfer-Encoding": "8bit",
        "Subject": "[dpdk-dev] [PATCH v2 3/4] net/netvsc: disable multi-queue on older\n\tservers",
        "X-BeenThere": "dev@dpdk.org",
        "X-Mailman-Version": "2.1.15",
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        "List-Id": "DPDK patches and discussions <dev.dpdk.org>",
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        "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": "NDIS multi-queue support is only in WS2012 or later. Check the NDIS\nversion to limit to single queue on older versions. Similar code\nexists in Linux driver.\n\nFixes: 4e9c73e96e83 (\"net/netvsc: add Hyper-V network device\")\nSigned-off-by: Stephen Hemminger <sthemmin@microsoft.com>\n---\n drivers/net/netvsc/hn_ethdev.c | 5 +++++\n 1 file changed, 5 insertions(+)",
    "diff": "diff --git a/drivers/net/netvsc/hn_ethdev.c b/drivers/net/netvsc/hn_ethdev.c\nindex b330bf3d7255..1256fa399b16 100644\n--- a/drivers/net/netvsc/hn_ethdev.c\n+++ b/drivers/net/netvsc/hn_ethdev.c\n@@ -732,6 +732,7 @@ eth_hn_dev_init(struct rte_eth_dev *eth_dev)\n \thv->chim_res  = &vmbus->resource[HV_SEND_BUF_MAP];\n \thv->port_id = eth_dev->data->port_id;\n \thv->latency = HN_CHAN_LATENCY_NS;\n+\thv->max_queues = 1;\n \n \terr = hn_parse_args(eth_dev);\n \tif (err)\n@@ -770,6 +771,10 @@ eth_hn_dev_init(struct rte_eth_dev *eth_dev)\n \tif (err)\n \t\tgoto failed;\n \n+\t/* Multi queue requires later versions of windows server */\n+\tif (hv->nvs_ver < NVS_VERSION_5)\n+\t\treturn 0;\n+\n \tmax_chan = rte_vmbus_max_channels(vmbus);\n \tPMD_INIT_LOG(DEBUG, \"VMBus max channels %d\", max_chan);\n \tif (max_chan <= 0)\n",
    "prefixes": [
        "v2",
        "3/4"
    ]
}