Re: [Xen-devel] xen.git branch reorg / success with 2.6.30-rc3 pv_ops dom0

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Mon, May 18, 2009 at 03:57:07PM +0100, Ian Campbell wrote:
> Hi Pasi,
> 
> On Thu, 2009-05-07 at 13:24 -0400, Pasi Kärkkäinen wrote:
> > On Wed, May 06, 2009 at 02:51:59PM -0700, Jeremy Fitzhardinge wrote:
> > > Great!  I'd be interested to know if you're still having HIGHPTE 
> > > problems.  It may or may not have got fixed.
> > > 
> > 
> > I just tried with CONFIG_HIGHPTE=y but that didn't seem to work:
> > http://pasik.reaktio.net/xen/pv_ops-dom0-debug/pv_ops-dom0-bootlog-30-xen331-linux-2.6.30-rc3-next-crash-with-highpte.txt
> > 
> > (XEN) mm.c:2006:d0 Bad type (saw 28000001 != exp e0000000) for mfn 6b0a6 
> > (pfn 2c959)
> > (XEN) mm.c:707:d0 Error getting mfn 6b0a6 (pfn 2c959) from L1 entry 
> > 000000006b0a6063 for dom0
> > (XEN) mm.c:3640:d0 ptwr_emulate: could not get_page_from_l1e()
> 
> I thought I might have a poke at this, how do you go about reproducing
> it? I've used your .config and it boots OK -- now I'm trying a kernbench
> run since I think you mentioned compiling a kernel in domain 0 at one
> point.
> 

I can reproduce it every time like this:

- boot into pv_ops dom0 kernel
- run "make bzImage && make modules"
- wait for the kernel compilation to finish..
- *crash*, before the compilation finishes, usually within 15-30mins

> How much RAM does your host have? Are you running 32 or 64 bit
> hypervisor? Which hypervisor version? From your .config I think your
> dom0 kernel is 32 bit, right?
> 

My host has 2GB of RAM.

Hypervisor is 32bit PAE, Fedora 11 Xen 3.3.1-11 rpms.
My dom0 kernel is 32bit PAE aswell.

grub.conf:

kernel /xen-3.3.gz dom0_mem=1024M
module /vmlinuz-2.6.30-rc3-tip root=/dev/sda1 ro
module /boot/initrd.img-2.6.30-rc3-tip

I'm (was) using xen-tip/next.

-- Pasi

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