Re: [PATCH] mm, memcg: Add memory.transparent_hugepage_disabled

David Rientjes
2020-03-24T19:17:11Z

On Tue, 24 Mar 2020, Kirill A. Shutemov wrote:

> On Tue, Mar 24, 2020 at 06:31:56PM +0800, Hui Zhu wrote:
> > /sys/kernel/mm/transparent_hugepage/enabled is the only interface to
> > control if the application can use THP in system level.
>
> No. We have prctl(PR_SET_THP_DISABLE) too.
>

Yeah, I think this is the key point since this can be inherited across
fork and thus you already have the ability to disable thp for a process
where you cannot even modify the binary to do MADV_NOHUGEPAGE.