Re: [PATCH] mm/vma: Do not register private-anon mappings with khugepaged during mmap

[Andrew Morton]

On Thu,  6 Mar 2025 12:00:37 +0530 Dev Jain <dev.jain@xxxxxxx> wrote:

> We already are registering private-anon VMAs with khugepaged during fault
> time, in do_huge_pmd_anonymous_page(). Commit "register suitable readonly
> file vmas for khugepaged" moved the khugepaged registration logic from
> shmem_mmap to the generic mmap path. Make this logic specific for non-anon
> mappings.

Please fully describe the userspace-visible effects of this bug.

> Fixes: 613bec092fe7 ("mm: mmap: register suitable readonly file vmas for khugepaged")
> Signed-off-by: Dev Jain <dev.jain@xxxxxxx>

Thanks, I'll add cc:stable.