linux-kernel - Re: [PATCH v5 4/9] scsi: use block layer helpers to calculate num of queues

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Message-ID: <yq15xmm73lg.fsf@ca-mkp.ca.oracle.com>
Date: Fri, 10 Jan 2025 16:37:24 -0500
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: Daniel Wagner <wagi@...nel.org>
Cc: Jens Axboe <axboe@...nel.dk>, Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        "Martin K. Petersen"
 <martin.petersen@...cle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Costa Shulyupin <costa.shul@...hat.com>,
        Juri Lelli
 <juri.lelli@...hat.com>,
        Valentin Schneider <vschneid@...hat.com>,
        Waiman Long <llong@...hat.com>, Ming Lei <ming.lei@...hat.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Mel Gorman <mgorman@...e.de>, Hannes Reinecke <hare@...e.de>,
        linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        linux-nvme@...ts.infradead.org, megaraidlinux.pdl@...adcom.com,
        linux-scsi@...r.kernel.org, storagedev@...rochip.com,
        virtualization@...ts.linux.dev, GR-QLogic-Storage-Upstream@...vell.com
Subject: Re: [PATCH v5 4/9] scsi: use block layer helpers to calculate num
 of queues


Daniel,

> Multiqueue devices should only allocate queues for the housekeeping CPUs
> when isolcpus=managed_irq is set. This avoids that the isolated CPUs get
> disturbed with OS workload.

Reviewed-by: Martin K. Petersen <martin.petersen@...cle.com>

-- 
Martin K. Petersen	Oracle Linux Engineering