Re: [PATCH v6 5/9] virtio: blk/scsi: use block layer helpers to calculate num of queues

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To: Daniel Wagner <wagi@xxxxxxxxxx>
Subject: Re: [PATCH v6 5/9] virtio: blk/scsi: use block layer helpers to calculate num of queues
From: Ming Lei <ming.lei@xxxxxxxxxx>
Date: Fri, 9 May 2025 09:52:43 +0800
Cc: Jens Axboe <axboe@xxxxxxxxx>, Keith Busch <kbusch@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Sagi Grimberg <sagi@xxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Costa Shulyupin <costa.shul@xxxxxxxxxx>, Juri Lelli <juri.lelli@xxxxxxxxxx>, Valentin Schneider <vschneid@xxxxxxxxxx>, Waiman Long <llong@xxxxxxxxxx>, Frederic Weisbecker <frederic@xxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxx>, Hannes Reinecke <hare@xxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, megaraidlinux.pdl@xxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, storagedev@xxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxx, GR-QLogic-Storage-Upstream@xxxxxxxxxxx
In-reply-to: <20250424-isolcpus-io-queues-v6-5-9a53a870ca1f@kernel.org>
References: <20250424-isolcpus-io-queues-v6-0-9a53a870ca1f@kernel.org> <20250424-isolcpus-io-queues-v6-5-9a53a870ca1f@kernel.org>

On Thu, Apr 24, 2025 at 08:19:44PM +0200, Daniel Wagner wrote:
> Multiqueue devices should only allocate queues for the housekeeping CPUs
> when isolcpus=io_queue is set. This avoids that the isolated CPUs get
> disturbed with OS workload.

With commit log fixed:

Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>

thanks,
Ming

References:
- [PATCH v6 0/9] blk: honor isolcpus configuration
  - From: Daniel Wagner
- [PATCH v6 5/9] virtio: blk/scsi: use block layer helpers to calculate num of queues
  - From: Daniel Wagner

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