linux-kernel - Re: [PATCH v6 6/9] isolation: introduce io

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Message-ID: <2db989db-4849-46a9-9bad-0b67d85d1650@suse.de>
Date: Fri, 25 Apr 2025 08:26:22 +0200
From: Hannes Reinecke <hare@...e.de>
To: Daniel Wagner <wagi@...nel.org>, 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>
Cc: "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>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 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 v6 6/9] isolation: introduce io_queue isolcpus type

On 4/24/25 20:19, Daniel Wagner wrote:
> Multiqueue drivers spreading IO queues on all CPUs for optimal
> performance. The drivers are not aware of the CPU isolated requirement
> and will spread all queues ignoring the isolcpus configuration.
> 
> Introduce a new isolcpus mask which allows the user to define on which
> CPUs IO queues should be placed. This is similar to the managed_irq but
> for drivers which do not use the managed IRQ infrastructure.
> 
> Signed-off-by: Daniel Wagner <wagi@...nel.org>
> ---
>   include/linux/sched/isolation.h | 1 +
>   kernel/sched/isolation.c        | 7 +++++++
>   2 files changed, 8 insertions(+)
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@...e.de                                +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
HRB 36809 (AG Nürnberg), GF: I. Totev, A. McDonald, W. Knoblich