Re: [v2 PATCH] mm: thp: fix false negative of shmem vma's THP eligibility

[Michal Hocko]

On Fri 07-06-19 03:57:18, Hugh Dickins wrote:
[...]
> The addition of "THPeligible" without an "Anon" in its name was
> unfortunate. I suppose we're two releases too late to change that.

Well, I do not really see any reason why THPeligible should be Anon
specific at all. Even if ...

> Applying process (PR_SET_THP_DISABLE) and mm (MADV_*HUGEPAGE)
> limitations to shared filesystem objects doesn't work all that well.

... this is what we are going with then it is really important to have a
single place to query the eligibility IMHO.

> I recommend that you continue to treat shmem objects separately from
> anon memory, and just make the smaps "THPeligible" more often accurate.

Agreed on this.

-- 
Michal Hocko
SUSE Labs