Re: [PATCH v3] mm/memory-failure: Support disabling soft offline for HugeTLB pages

[Michal Hocko]

On Wed 16-09-26 15:28:01, David Hildenbrand wrote:
> On 9/16/26 15:19, Michal Hocko wrote:
> > On Wed 16-09-26 15:08:45, David Hildenbrand wrote:
> >>
> >>>
> >>> OK, so apparently there are some BIOSes which abuse this feature to
> >>> mimic a real HW poisoning. This doesn't change the overall picture
> >>> though
> >>
> >> Is this really abusing? We know that a page is shaky and will likely go bad in
> >> the future, For now it is still accessible. Trying to migrate off that page stop
> >> using it right away sounds pretty logical to me.
> > 
> > Yes, no dispute on that. But we have HW poisoning for exactly that
> > purpose, no?
> 
> Well, that tells you that the page content is effectively gone and should be
> tried to be recovered / migrated away. Unless I am messing up terminology here.

Maybe it is me messing up the terminology...
But I guess we have established that whether soft offlining is being
abused or not, excluding hugetlb through a configuration is just a wrong
thing to do.
-- 
Michal Hocko
SUSE Labs