linux-kernel - Re: [PATCH V4 0/6] genirq/affinity: Abstract APIs from managed irq affinity spread

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Message-ID: <87zgaoew45.ffs@tglx>
Date:   Wed, 11 Jan 2023 19:58:50 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Ming Lei <ming.lei@...hat.com>, Jens Axboe <axboe@...nel.dk>
Cc:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
        Christoph Hellwig <hch@....de>,
        John Garry <john.garry@...wei.com>
Subject: Re: [PATCH V4 0/6] genirq/affinity: Abstract APIs from managed irq
 affinity spread

On Wed, Jan 11 2023 at 10:18, Ming Lei wrote:
> On Tue, Dec 27, 2022 at 10:28:59AM +0800, Ming Lei wrote:
>> Hello,
>> 
>> irq_build_affinity_masks() actually grouping CPUs evenly into each managed
>> irq vector according to NUMA and CPU locality, and it is reasonable to abstract
>> one generic API for grouping CPUs evenly, the idea is suggested by Thomas
>> Gleixner.
>> 
>> group_cpus_evenly() is abstracted and put into lib/, so blk-mq can re-use
>> it to build default queue mapping.
>> 
>> blk-mq IO perf data is observed as more stable, meantime with big
>> improvement, see detailed data in the last patch.
>> 
>> Please consider it for v6.3!
>> 
>> V4:
>> 	- address comments from John, not export the API, given so far no
>> 	  module uses this symbol
>> 	- add maintainer entry for new added lib/group_cpus.c
>> 	- rebase on 6.2
>
> Any chance to take a look at this patchset?

I'm at it. My sickness+vacation induced backlog is horrible ....