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SubjectRe: [stable] [PATCH 2/2] xen: don't drop NX bit
* Greg KH ( wrote:
> On Mon, Jun 16, 2008 at 03:01:56PM -0700, Jeremy Fitzhardinge wrote:
> > When converting the pfn/mfn in a pagetable entry, make sure we mask
> > out the protection flags properly. Formerly, this code was losing the
> > NX bit, and not dealing with extra Xen-defined software flags in ptes.
> >
> > Because NX is now enforced properly, we must put the hypercall page
> > into the .text segment so that it is executable.
> >
> > Signed-off-by: Jeremy Fitzhardinge <>
> > Cc: Stable Kernel <>
> While it's great that you tell the stable people about this, but is it
> realistic? Is anyone using Xen as contained in the mainline kernel
> these days?
> If a distro were to be based on 2.6.25 and we take this patch, they will
> just revert it back out due to their very large Xen patchset they apply
> on top to get a "working" Xen version, right?

Fedora uses proper pv-ops for Xen. It's a good -stable candidate.

Acked-by: Chris Wright <>


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