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Mon, 27 Nov 2023 00:28:47 +0000 From: Mike Christie To: fam@euphon.net, stefanha@redhat.com, jasowang@redhat.com, mst@redhat.com, sgarzare@redhat.com, pbonzini@redhat.com, qemu-devel@nongnu.org Subject: [PATCH v2 0/2] vhost-scsi: Support worker ioctls Date: Sun, 26 Nov 2023 18:28:32 -0600 Message-Id: <20231127002834.8670-1-michael.christie@oracle.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: DS7PR03CA0274.namprd03.prod.outlook.com (2603:10b6:5:3ad::9) To CY8PR10MB7243.namprd10.prod.outlook.com (2603:10b6:930:7c::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY8PR10MB7243:EE_|DM4PR10MB6863:EE_ X-MS-Office365-Filtering-Correlation-Id: a651c01c-9dda-4356-31cc-08dbeedfd1e3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; 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envelope-from=michael.christie@oracle.com; helo=mx0a-00069f02.pphosted.com X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=-1, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The following patches allow users to configure the vhost worker threads for vhost-scsi. With vhost-net we get a worker thread per rx/tx virtqueue pair, but for vhost-scsi we get one worker for all workqueues. This becomes a bottlneck after 2 queues are used. In the upstream linux kernel commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/vhost/vhost.c?id=c1ecd8e9500797748ae4f79657971955d452d69d we enabled the vhost layer to be able to create a worker thread and attach it to a virtqueue. This patchset adds support to vhost-scsi to use these ioctls so we are no longer limited to the single worker. v2: - Make config option a bool instead of an int. Reviewed-by: Stefan Hajnoczi