Re: [PATCH v4] mm: mmap: map MAP_STACK to VM_NOHUGEPAGE only if THP is enabled

On 07.05.25 15:13, Ignacio Moreno Gonzalez via B4 Relay wrote:

From: Ignacio Moreno Gonzalez Ignacio.MorenoGonzalez@kuka.com

commit c4608d1bf7c6 ("mm: mmap: map MAP_STACK to VM_NOHUGEPAGE") maps the mmap option MAP_STACK to VM_NOHUGEPAGE. This is also done if CONFIG_TRANSPARENT_HUGETABLES is not defined. But in that case, the VM_NOHUGEPAGE does not make sense.

I discovered this issue when trying to use the tool CRIU to checkpoint and restore a container. Our running kernel is compiled without CONFIG_TRANSPARENT_HUGETABLES.

Like very kernel out there, because this config option does not exist.

:)

You only fixed it in the comment below the ---