Re: [PATCH 4.4 103/105] Revert "x86/mm/pat: Ensure cpa->pfn only contains page frame numbers"

From: Greg Kroah-Hartman
Date: Fri Aug 24 2018 - 15:17:56 EST

On Fri, Aug 24, 2018 at 10:08:28AM -0700, Roland Dreier wrote:
> > See
> > <>.
> Thanks! I'm not using SGI UV and I'm not using kexec, so I guess I
> sidestepped most of those issues. Greg, I think we need to unrevert
> the cpa->pfn change (otherwise the L1TF fix probably gets pretty
> messy) and I guess pull in the other patches that Ben mentions.

Ok, so what patch should be reverted? I'm seeing other reports of
problems all around this same area, but I can't figure out exactly what
to do.

Guenter, any ideas?


greg k-h