On Fri, 18 May 2018 18:35:08 -0700 Dan Williams <dan.j.williams(a)intel.com> wrote:
get_user_pages_fast() for device pages is missing the typical
that all page references have been taken while the mapping was valid.
Without this validation truncate operations can not reliably coordinate
against new page reference events like O_DIRECT.
I'm not seeing anything in the changelog which justifies a -stable
backport. ie: a description of the end-user-visible effects of the