On Mon, Aug 16, 2010 at 05:46:24PM +0800, benian wrote:
> Hi Pasi
> I finally boot up successfully by simply modified the kernel config
> item CONFIG_XEN_MAX_DOMAIN_MEMORY=32 to CONFIG_XEN_MAX_DOMAIN_MEMORY=128
> (just choose a random value >72 ),
> then rebuild the kernel-2.6.32 , and everything is ok.
> By the way, i 've done many test and i finally found that
> if unallocated memory(total - dom0 ) >32GB, boot up would be failed in my
> environment.
> for example, after I modified the kernel config, hypervisor boot normally
> and dom0 get 72GB.
> If i add dom0_mem= 32G(unallocated 40G) to grub option, hypervisor boot
> fail again,
> and if dom0_mem= 41G(unallocated 31G), hypervisor boot normally again.
> So , might it be a problem of xen-4.0 that unable to handle unallocated
> memory >32GB?
>
Sounds like a bug yeah.. How does it fail in the dom0_mem=32G case? What's the
error?
Can you please paste the full bootlog of the failing boot from a serial
console?
http://wiki.xensource.com/xenwiki/XenSerialConsole
-- Pasi
> Regards,
> Ben
> 2010/8/12 Pasi Kärkkäinen <[1]pasik@xxxxxx>
>
> On Thu, Aug 12, 2010 at 03:08:25PM +0800, benian wrote:
> >
> >
> > My environment is xen-4.0.0 + pvops2.6.32 kernel + fedora12
> >
> > I can run xen hypervisor smoothly when system memory below 64G
> >
> > But if I plug 4GB more memory to my server, XEN hypervisor start
> fail then
> > crash and restart automatically.
> >
> > The final screen is some message about memory address which will
> not be
> > displayed in normal process
> >
> >
> >
> > I read from XEN 4.0.0 features that Xen support 1 TB of RAM per
> host, so I
> > am not sure what *s wrong with this situation.
> >
> >
> >
> > Any idea is appreciated and welcome
> >
> >
>
> How much memory does your dom0 have? ie. what's your dom0_mem= option
> for xen.gz in grub.conf.
> Have you tried different values? ie. 2GB, 4GB, 8GB?
>
> Also setup a serial console so you can figure out if it's the Xen
> hypervisor or dom0 kernel crashing:
> [2]http://wiki.xensource.com/xenwiki/XenSerialConsole
>
> and more info about troubleshooting pvops dom0 kernels (also an example
> about serial console with pvops dom0):
> [3]http://wiki.xensource.com/xenwiki/XenParavirtOps
>
> Those should help.
> -- Pasi
>
> References
>
> Visible links
> 1. mailto:pasik@xxxxxx
> 2. http://wiki.xensource.com/xenwiki/XenSerialConsole
> 3. http://wiki.xensource.com/xenwiki/XenParavirtOps
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