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Tue, 14 Nov 2023 00:36:47 +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 0/2] vhost-scsi: Support worker ioctls Date: Mon, 13 Nov 2023 18:36:42 -0600 Message-Id: <20231114003644.7026-1-michael.christie@oracle.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: DS7PR05CA0094.namprd05.prod.outlook.com (2603:10b6:8:56::11) To CY8PR10MB7243.namprd10.prod.outlook.com (2603:10b6:930:7c::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY8PR10MB7243:EE_|SJ0PR10MB5645:EE_ X-MS-Office365-Filtering-Correlation-Id: 83f01359-61b0-4150-dcb9-08dbe4a9c89a 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: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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=0.001, RCVD_IN_MSPIKE_WL=0.001, 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.