Re: [PATCH] mm: make MEMFD_CREATE into a selectable config option

Mike Kravetz
2023-07-03T22:48:44Z

On 06/30/23 08:32, Darrick J. Wong wrote:
> On Fri, Jun 30, 2023 at 11:08:53AM +0200, Thomas Weißschuh wrote:
> > The memfd_create() syscall, enabled by CONFIG_MEMFD_CREATE, is useful on
> > its own even when not required by CONFIG_TMPFS or CONFIG_HUGETLBFS.
>
> If you don't have tmpfs or hugetlbfs enabled, then what fs ends up
> backing the file returned by memfd_create()? ramfs?
>
> (Not an objection, I'm just curious...)
>

It looks like shmem/tmpfs falls back to ramfs?

--
Mike Kravetz