Re: [External] Re: [PATCH] mm: hugetlb: fix a race between memory-failure/soft_offline and gather_surplus_pages

From: Oscar Salvador
Date: Wed Apr 21 2021 - 04:49:17 EST

On Wed, Apr 21, 2021 at 04:41:10PM +0800, Muchun Song wrote:

> But softoffline does not set page hwpoison before
> __get_hwpoison_page(). So the page still can be
> allocated. Right?

Yep, soft_offline() only marks the page as hwpoison once the page has been
fully contended and no other use is possible.
But yeah, hugetlb is a bit trickier in that regard.

This needs fixing in there.

Oscar Salvador