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

Ming Lei
2023-01-12T01:46:22Z

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