Re: [PATCH v2] slub: keep empty main sheaf as spare in __pcs_replace_empty_main()

[Hao Li]

On Fri, Jan 16, 2026 at 05:16:03PM +0800, Zhao Liu wrote:
> > I'd like to dig a bit deeper to confirm whether the "256 tasks" result is truly
> > a regression.
> 
> The "256" seems align closely with the NUMA topology on my machine, so
> I'm unsure how it will perform on other machines.

Got it. Thanks, in any case, I'll try to reproduce it first.
> 
> > Could you please share the original full report, or let me know
> > which test case under will-it-scale/ you used?
> 
> I mainly followed Suneeth's steps [*]:
> 
> 1) git clone https://github.com/antonblanchard/will-it-scale.git
> 2) git clone https://github.com/intel/lkp-tests.git
> 3) cd will-it-scale && git apply 
> lkp-tests/programs/will-it-scale/pkg/will-it-scale.patch
> 4) make
> 5) python3 runtest.py mmap2 25 process 0 0 1 8 64 128 192 256
> 
> [*]: https://lore.kernel.org/all/262c742f-dc0c-4adc-b23c-047cd3298a5e@xxxxxxx/

Thanks!

> 
> Sine the raw perf.data files are too big to be blocked, if you need to
> see any specific part of the content, I can paste the info for you.
> 
> Regards,
> Zhao
>