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

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Message-ID: <Y79mJVAw4/tFZ7sp@T590>
Date:   Thu, 12 Jan 2023 09:45:09 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Jens Axboe <axboe@...nel.dk>, 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 07:58:50PM +0100, Thomas Gleixner wrote:
> 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 ....

Thanks for the response, and wish you good health.


thanks, 
Ming