Re: [PATCH 1/3] x86-32: Separate 1:1 pagetables from swapper_pg_dir

Ian Campbell
2010-12-08T09:34:22Z

On Wed, 2010-12-08 at 04:15 +0000, Greg KH wrote:
> On Tue, Dec 07, 2010 at 07:06:31PM -0800, Jeremy Fitzhardinge wrote:
> > On 12/07/2010 01:05 PM, Greg KH wrote:
> > > On Thu, Nov 11, 2010 at 04:16:14PM +0100, Joerg Roedel wrote:
> > >> commit fd89a137924e0710078c3ae855e7cec1c43cb845 upstream
> > > applied, thanks.
> >
> > This will need as well 5b5c1af104ab5adec1be9dcb4c787492d83d8d83 to
> > prevent Xen regressions.
>
> So should I add that to a specific release? The next .36 stable or something else?

5b5c1af104ab5 fixed an issue exposed by b40827fa7268. I'm not sure if
fd89a13792 also exposes a similar issue, but I think it does not:

It looks to me like fd89a13792 only reads from swapper_pg_dir and writes
to trampoline_pg_dir which is unpinned (and unused) under Xen and hence
there is no problem and 5b5c1af104ab5 is not needed.

b40827fa7268 is in 2.6.37-rc and doesn't seem to be targeted for a
stable backport AFAICT.

Ian.