On Fri, Jan 12, 2018 at 03:27:32PM +0100, Jiri Kosina wrote: > On Thu, 11 Jan 2018, Pavel Tatashin wrote: > > > The page table order must be increased for EFI table in order to avoid a > > bug where NMI tries to change the page table to kernel page table, while > > efi page table is active. > > > > For more disccussion about this bug, see this thread: > > http://lkml.iu.edu/hypermail/linux/kernel/1801.1/00951.html > > > > Signed-off-by: Pavel Tatashin <[email protected]> > > Reviewed-by: Steven Sistare <[email protected]> > > Acked-by: Jiri Kosina <[email protected]> > > We are carrying similar patch in our 4.4 codestream as well. > > Please note that this is needed only for those trees that have 67a9108ed43 > ("x86/efi: Build our own page table structures") backported to it. That > used to be in some -stable releases, and some had it reverted, so please > check that.
The 4.4-stable tree reverted this patch, so I'll take the 4.4-specific patch for this that was just sent. thanks, greg k-h
