linux-kernel - Re: [PATCH v2 3/3] lib/group_cpus.c: honor housekeeping config when grouping CPUs

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Message-ID: <1fbf3f91-218a-47a6-95f3-7c08a6df2ecf@suse.de>
Date: Fri, 28 Jun 2024 08:24:58 +0200
From: Hannes Reinecke <hare@...e.de>
To: Daniel Wagner <dwagner@...e.de>, Jens Axboe <axboe@...nel.dk>,
 Keith Busch <kbusch@...nel.org>, Sagi Grimberg <sagi@...mberg.me>,
 Thomas Gleixner <tglx@...utronix.de>, Christoph Hellwig <hch@....de>
Cc: Frederic Weisbecker <fweisbecker@...e.com>, Mel Gorman <mgorman@...e.de>,
 Sridhar Balaraman <sbalaraman@...allelwireless.com>,
 "brookxu.cn" <brookxu.cn@...il.com>, Ming Lei <ming.lei@...hat.com>,
 linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
 linux-nvme@...ts.infradead.org
Subject: Re: [PATCH v2 3/3] lib/group_cpus.c: honor housekeeping config when
 grouping CPUs

On 6/27/24 16:10, Daniel Wagner wrote:
> group_cpus_evenly distributes all present CPUs into groups. This ignores
> the isolcpus configuration and assigns isolated CPUs into the groups.
> 
> Make group_cpus_evenly aware of isolcpus configuration and use the
> housekeeping CPU mask as base for distributing the available CPUs into
> groups.
> 
> Fixes: 11ea68f553e2 ("genirq, sched/isolation: Isolate from handling managed interrupts")
> Signed-off-by: Daniel Wagner <dwagner@...e.de>
> ---
>   lib/group_cpus.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
>   1 file changed, 73 insertions(+), 2 deletions(-)
> 
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