Re: [PATCH 04/12] mm: hugetlb_vmemmap: generalize vmemmap page allocation

[Qi Zheng]

On 10/20/26 7:58 PM, Muchun Song wrote:
> Vmemmap page allocation is currently tied to restoring a virtual range
> and assumes an empty destination list.  These constraints prevent it from
> being reused when pages are requested independently of a vmemmap range or
> appended to an existing list.
>
> Generalize the allocator and give it an all-or-nothing list contract so
> the restore and optimization paths can share the same allocation policy.
> This also allows HVO head-page allocation to fail gracefully under memory
> pressure without triggering the OOM killer.
>
> Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
> ---
>   mm/hugetlb_vmemmap.c | 40 ++++++++++++++++++----------------------
>   1 file changed, 18 insertions(+), 22 deletions(-)

LGTM. so:

Reviewed-by: Qi Zheng <qi.zheng@xxxxxxxxx>

Thanks,
Qi