Re: 2.6.25-rc1 xen pvops regression

[Joel Becker <Joel.Becker@oracle.com>]

On Thu, Feb 21, 2008 at 10:12:36PM +0000, Ian Campbell wrote:
> 
> On Thu, 2008-02-21 at 13:37 -0800, Jeremy Fitzhardinge wrote:
> > H. Peter Anvin wrote:
> > >> Still curious about why a pagetable page is ending up in that range 
> > >> though.  Seems like it shouldn't be possible, since we shouldn't be 
> > >> allowed to allocate from those pages, at least until the DMI probe 
> > >> has happened...  Unless the early allocator is only excluded from 
> > >> e820 reserved pages, which would cause a problem on systems which 
> > >> don't reserve the DMI space...  HPA?
> > >>
> > >
> > > I thought the problem was a Xen-provided pagetable from before Linux 
> > > started? 
> > 
> > Hm, I don't think so.  The domain-builder pagetable is put after the 
> > kernel, so it shouldn't be under 1M.
> 
> I can confirm that it is Linux which is allocating it. The call path:

	Also, I have older kernels (2.6.24-rc era) that run Just Fine.
I haven't changed my dom0 at all.

Joel

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Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127