Re: [PATCH] mm,hwpoison: unmap poisoned page before invalidation

On Tue, Mar 29, 2022 at 11:49:53AM -0400, Rik van Riel wrote:

It results in us returning to userspace as if the page fault had been handled, resulting in a second fault on the same address.

However, now the page is no longer in the page cache, and we can read it in from disk, to a page that is not hardware poisoned, and we can then use that second page without issues.

Ok, I see, thanks a lot for the explanation Rik.