Re: [PATCH v2 3/3] selftests/mm/charge_reserved_hugetlb: fix hugetlbfs mount size for large hugepages

[David Hildenbrand (Red Hat)]

On 12/21/25 09:58, Li Wang wrote:
> charge_reserved_hugetlb.sh mounts a hugetlbfs instance at /mnt/huge with
> a fixed size of 256M. On systems with large base hugepages (e.g. 512MB),
> this is smaller than a single hugepage, so the hugetlbfs mount ends up
> with effectively zero capacity (often visible as size=0 in mount output).
>
> As a result, write_to_hugetlbfs fails with ENOMEM and the test can hang
> waiting for progress.

I'm curious, what's the history of using "256MB" in the first place (or 
specifying any size?).

--
Cheers

David