Re: [patch v3] mm: test_vmstat: add synthetic benchmark for vm stats

[David Rientjes]

On Fri, 11 Sep 2026, Andrew Morton wrote:

> > Add a synthetic benchmark that can be used to measure performance of VM
> > statistics.  This is used to analyze any improvements or regressions in
> > functions that are frequently used in hot code paths.
> > 
> > The test is run by KUnit or doing modprobe vmstat_kunit directly.
> 
> Can you please quote some typical kernel output in the changelog?  That
> will help others to review the proposed change.
> 

Ack, will include the output in v4.

> Sashiko made what appear to be some good points:
> 	https://sashiko.dev/#/patchset/014ef68b-6312-bcdc-f432-34c31476fe77@xxxxxxxxxx
> 

Got it, I'll use NR_MLOCK instead of SLABS_SCANNED since it's display only 
and won't have any side effects at runtime.

Instead of switching the type of the "rem" variable as suggested, we can 
just remove it entirely.