Re: [linux-next:master] [mm/hugetlb_vmemmap] 875fa64577: vm-scalability.throughput -34.3% regression

[Yu Zhao <yuzhao@xxxxxxxxxx>]

On Mon, Jul 8, 2024 at 11:11 PM kernel test robot <oliver.sang@xxxxxxxxx> wrote:
>
> Hello,
>
> kernel test robot noticed a -34.3% regression of vm-scalability.throughput on:
>
>
> commit: 875fa64577da9bc8e9963ee14fef8433f20653e7 ("mm/hugetlb_vmemmap: fix race with speculative PFN walkers")

This is likely caused by synchronize_rcu() wandering into the
allocation path. I'll patch that up soon.