Re: [PATCH v9 2/2] mm/memory hotplug/unplug: Optimize zone->contiguous update when changes pfn range

[David Hildenbrand (Arm)]

On 3/9/26 01:42, Li, Tianyou wrote:
> Hi David, Mike & Other maintainers,

Hi!

> 
> Just a quick update: Yuan and I created a new patch based on David and
> Mike's code, updated the documentation as well, performed the
> performance test, double check all the references etc. We observed a
> slightly performance regression, not sure it was caused by the
> environment configuration or we triggered some unexpected behavior. We
> might need a bit more time to investigate. Will send out the patch soon
> once we have confirmed data for the performance regression. Thanks.

A performance regression would be rather unexpected, unless we somehow
don't ever set zone->contiguous=true any more :)

In which test / code path did you observe a regression?

-- 
Cheers,

David