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Date:   Wed, 11 Jan 2023 10:18:04 +0800
From:   Ming Lei <ming.lei@redhat.com>
To:     Thomas Gleixner <tglx@linutronix.de>, Jens Axboe <axboe@kernel.dk>
Cc:     linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>,
        John Garry <john.garry@huawei.com>
Subject: Re: [PATCH V4 0/6] genirq/affinity: Abstract APIs from managed irq
 affinity spread
Message-ID: <Y74cXN4SP7FNtSl3@T590>
References: <20221227022905.352674-1-ming.lei@redhat.com>
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Hello Thomas, Jens and guys,

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?


thanks,
Ming