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Thu, 16 Jan 2020 00:46:12 +0000 From: "Wunderlich, Mark" To: "linux-nvme@lists.infradead.org" Subject: [PATCH 1/2] nvme-tcp: Set SO_PRIORITY for all host sockets Thread-Topic: [PATCH 1/2] nvme-tcp: Set SO_PRIORITY for all host sockets Thread-Index: AdXMBDkCDni9KZdMS6O2d5CVE1ly6A== Date: Thu, 16 Jan 2020 00:46:12 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: dlp-reaction: no-action dlp-version: 11.2.0.6 dlp-product: dlpe-windows authentication-results: spf=none (sender IP is ) smtp.mailfrom=mark.wunderlich@intel.com; x-originating-ip: [192.55.52.209] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: be708ac5-7ff6-439a-75c0-08d79a1d7c5f x-ms-traffictypediagnostic: BYASPR01MB0042: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:7219; x-forefront-prvs: 02843AA9E0 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(396003)(136003)(376002)(346002)(366004)(39860400002)(199004)(189003)(66556008)(8676002)(81166006)(71200400001)(81156014)(66446008)(8936002)(66476007)(76116006)(5660300002)(86362001)(2906002)(186003)(66946007)(64756008)(33656002)(9686003)(55016002)(6506007)(52536014)(478600001)(6916009)(26005)(316002)(7696005)(4326008); 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org nvme-tcp: Set SO_PRIORITY for all host sockets. Enable ability to associate all sockets related to NVMf TCP traffic to a priority group that will perform optimized network processing for this traffic class. Maintain initial default behavior of using priority of zero. Signed-off-by: Kiran Patil Signed-off-by: Mark Wunderlich --- drivers/nvme/host/tcp.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index 6d43b23a..2af7e8c 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -20,6 +20,16 @@ struct nvme_tcp_queue; +/* Define the socket priority to use for connections were it is desirable + * that the NIC consider performing optimized packet processing or filtering. + * A non-zero value being sufficient to indicate general consideration of any + * possible optimization. Making it a module param allows for alternative + * values that may be unique for some NIC implementations. + */ +static int so_priority; +module_param(so_priority, int, 0644); +MODULE_PARM_DESC(so_priority, "nvme tcp socket optimize priority"); + enum nvme_tcp_send_state { NVME_TCP_SEND_CMD_PDU = 0, NVME_TCP_SEND_H2C_PDU, @@ -1304,6 +1314,17 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, goto err_sock; } + if (so_priority > 0) { + ret = kernel_setsockopt(queue->sock, SOL_SOCKET, SO_PRIORITY, + (char *)&so_priority, sizeof(so_priority)); + if (ret) { + dev_err(ctrl->ctrl.device, + "failed to set SO_PRIORITY sock opt, ret %d\n", + ret); + goto err_sock; + } + } + /* Set socket type of service */ if (nctrl->opts->tos >= 0) { opt = nctrl->opts->tos; _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme