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Thu, 16 Apr 2026 19:30:18 +0000 From: Aaron Tomlin To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, mst@redhat.com Cc: atomlin@atomlin.com, aacraid@microsemi.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, liyihang9@h-partners.com, kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, shivasharan.srikanteshwara@broadcom.com, chandrakanth.patil@broadcom.com, sathya.prakash@broadcom.com, sreekanth.reddy@broadcom.com, suganath-prabu.subramani@broadcom.com, ranjan.kumar@broadcom.com, jinpu.wang@cloud.ionos.com, tglx@kernel.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, akpm@linux-foundation.org, maz@kernel.org, ruanjinjie@huawei.com, bigeasy@linutronix.de, yphbchou0911@gmail.com, wagi@kernel.org, frederic@kernel.org, longman@redhat.com, chenridong@huawei.com, hare@suse.de, kch@nvidia.com, ming.lei@redhat.com, tom.leiming@gmail.com, steve@abita.co, sean@ashe.io, chjohnst@gmail.com, neelx@suse.com, mproche@gmail.com, nick.lange@gmail.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com Subject: [PATCH v11 08/13] virtio: blk/scsi: use block layer helpers to constrain queue affinity Date: Thu, 16 Apr 2026 15:29:37 -0400 Message-ID: <20260416192942.1243421-9-atomlin@atomlin.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260416192942.1243421-1-atomlin@atomlin.com> References: <20260416192942.1243421-1-atomlin@atomlin.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BL1PR13CA0290.namprd13.prod.outlook.com (2603:10b6:208:2bc::25) To CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM (2603:10a6:400:70::10) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CWLP123MB3523:EE_|CWXP123MB4039:EE_ X-MS-Office365-Filtering-Correlation-Id: 2441cf57-ff69-4970-9cd7-08de9bee9784 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|366016|56012099003|18002099003|22082099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?JqIV4I8T3nE6EIyFeTLBf35AYaeit/G++Q5+/w7REeUgTE4Xs/52hGQYLkSg?= =?us-ascii?Q?KXjRSB55RLFBKnfmbh8+e7McuL8V+gAbowY4AyZkhOeobN9Hs5Rsd+me0kPs?= =?us-ascii?Q?hrr4/NeitNV0UEe5y9dP3fPVkl8opEZ+jJNahD0Q4PM0rXR+/PiIt/Flu7YT?= =?us-ascii?Q?u9hfVSyaQ5MIIt6eHYjFI+NOdSPpM9vnG572VPezR2Kigkp06YSSN79dVNxu?= =?us-ascii?Q?ySynLBBvAOjc6N6pUmafjW6PcoalV734ILf9mz8m34NDyRzhUFbyt/02pr/d?= =?us-ascii?Q?bjw0Jh15n8QUd40S6tGaPKxM8phRwlGsIHe9p52KQhcuTi1lAaQSbmrqtT9n?= =?us-ascii?Q?hpTd8nWBu+mPYDbqJKj0mu6SCloaItLsfBiuKu6wv6kQkskA9kgs9y/hidfy?= =?us-ascii?Q?L3YwoQlNYtfThDMjVz2FzgoOw84iUu9wIQDnkr0OMpHFU1+rmnHOJbsmod2w?= =?us-ascii?Q?UzD5H6EAQZq2BxmVl7yiUihNtvYn+S7J0mTWkivK5fzRoszXPW1hGVqeaV7S?= =?us-ascii?Q?cFZDAP383ewCS+mYTY1k8T47fr0Z+XsZJddVG29hXUL0AyfVk74Kwag7kb0E?= =?us-ascii?Q?4VncjyLFTKp6AB6mz5eRMpMjBrfCYNAzXCjY7WTSMNFarinaH1fwIYK3lQH8?= =?us-ascii?Q?yGMw2RZuzVJXnozFWHYcAElJqT0nAPbwfkCvIrbjGsUDj3/PSV2fpUC04emp?= =?us-ascii?Q?AF2ByxWBBeHsRUYn9ZyURIP7LoYtCAK/q5+m4rXBLI9Z987/eZMTW2SUq3N8?= =?us-ascii?Q?qN9g8m21s/fuTxKxBOqN4XPTuiYGfQGTQfKwPE66N7NxEH7V0pLDcFdFxeQ6?= =?us-ascii?Q?W8puFn7Rlgiko46tnuSlzLO6sUlLoZq2mO+rHrA7LuGyzFazQhhFxn20NzAO?= =?us-ascii?Q?8SGwdMWo03igS0DtnNVcIe6Fr4uPlbtdpYpsdvBwEQyo/FRao9vZ5CDLw8np?= =?us-ascii?Q?3aczkeygzkv8SkGJKTzvvdjqGHK8Q8A2RFXY4ncaiO6EM7t6B8Iuiq2er0nP?= =?us-ascii?Q?0G0AhDDWHIsa1+3M0POMTmOkVOwnDbgnXsgjN1J2YAxCjA0g9KdBpjof7I7A?= =?us-ascii?Q?DaTAJry3KuxBakNdCqpVOR8ZQrbaAl5dN+Fne3Fmuy6cOIX7P0HSGEUkN54j?= =?us-ascii?Q?krWDZ1pU5DjAezXZchfQJkYSZcj63qy4O0r6VnrbW7dVmCI1n/rQAq/WIPa6?= =?us-ascii?Q?ymIJLW2++ITaBYWQTRWyeEA4+kLgdYH+bqG1cVXLqbQFpjfQy4l5hAGEcp12?= =?us-ascii?Q?eNsfrnjmtla9x8XQ+mFNeIqKjnkcVZSvqGhE6PoGM2Iv+CiDJPtzacpkz8Ut?= =?us-ascii?Q?QPcx1+cRj9sV7ZHH/gxq9c54gIMX1Liam/loSqK7ybTiqu2CRSutPj/pKv+5?= =?us-ascii?Q?umBHXZjGR1b6fU3b+t2QQNeoDCO/nxXh4Aolhqklxv5Z2faX5ikpplv1Rf3G?= =?us-ascii?Q?9t6kLhn1eTD11f2ZIlKaZL7oO67ZyIvZLv+CYm7mgJHs+nzue4EHGKfEkqPd?= =?us-ascii?Q?BDCdiUV/7Dd+UZz4xyHB9yBHRZjGoBaFFoLn+pVukiCF8emWmz2gcM3HAPDU?= =?us-ascii?Q?j7L2feB7+Y3R3VGbweSgNhzZppgrCwfK8TAd7j0YZ0CcIVFw9UYsuwTCz756?= =?us-ascii?Q?Eoi4SEPcWFThVUTSGz+/6tdREZkOrRdj3b+jV8dLReclGjbH1oDMfcOMTM/P?= =?us-ascii?Q?Ya3P78p6t55xyaX/MfxUhRCViASjqVulYecXFAnXbtlXMHaaESue6nzgl9Nh?= =?us-ascii?Q?fbN/Ybw2mw=3D=3D?= X-OriginatorOrg: atomlin.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2441cf57-ff69-4970-9cd7-08de9bee9784 X-MS-Exchange-CrossTenant-AuthSource: CWLP123MB3523.GBRP123.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 16 Apr 2026 19:30:18.3121 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: e6a32402-7d7b-4830-9a2b-76945bbbcb57 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: dQd2Ks8OBxkMxOJLihdvs6Kb9mRNdScHd7bfUXYhctRO+ePc7uRh82JBDbPIdWaooSKoIksrVcsDmoWYL2fRLg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CWXP123MB4039 From: Daniel Wagner Ensure that IRQ affinity setup also respects the queue-to-CPU mapping constraints provided by the block layer. This allows the virtio drivers to avoid assigning interrupts to CPUs that the block layer has excluded (e.g., isolated CPUs). Signed-off-by: Daniel Wagner Reviewed-by: Martin K. Petersen Reviewed-by: Hannes Reinecke Signed-off-by: Aaron Tomlin --- drivers/block/virtio_blk.c | 4 +++- drivers/scsi/virtio_scsi.c | 5 ++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index b1c9a27fe00f..9d737510454b 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -964,7 +964,9 @@ static int init_vq(struct virtio_blk *vblk) unsigned short num_vqs; unsigned short num_poll_vqs; struct virtio_device *vdev = vblk->vdev; - struct irq_affinity desc = { 0, }; + struct irq_affinity desc = { + .mask = blk_mq_possible_queue_affinity(), + }; err = virtio_cread_feature(vdev, VIRTIO_BLK_F_MQ, struct virtio_blk_config, num_queues, diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 0ed8558dad72..520a7da5386e 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -849,7 +849,10 @@ static int virtscsi_init(struct virtio_device *vdev, u32 num_vqs, num_poll_vqs, num_req_vqs; struct virtqueue_info *vqs_info; struct virtqueue **vqs; - struct irq_affinity desc = { .pre_vectors = 2 }; + struct irq_affinity desc = { + .pre_vectors = 2, + .mask = blk_mq_possible_queue_affinity(), + }; num_req_vqs = vscsi->num_queues; num_vqs = num_req_vqs + VIRTIO_SCSI_VQ_BASE; -- 2.51.0