[Xen-devel] Re: dom0 boot failure with 256G

[mukesh rathor <mukesh.rathor@xxxxxxxxxx>]

Ian Pratt <Ian.Pratt <at> eu.citrix.com> writes:

> 
> >     I've been intensely debugging a dom0 crash right at boot in
> >     pagetable_init() with 256G. We are running 64bit hyp with 32bit
> > dom0.
> >     This on xen 3.1.3, which seems to have fixes from changeset 16548.
> 
> 256GB is more than a 32b dom0 can handle. Presumably it works if you set
> dom0_mem= to something smaller?
> 
> We should probably make the clipping of dom0 memory to something like
> 64GB automatic.
> 
> Ian
> 
>  
..........

My apologies, I forgot to mention dom0_mem is set to : dom0_mem=569M

(XEN) Command line: console=com2,ttyS0 com2=115200,8n1 earlykdb dom0_mem=569M
mem=256G

Things are fine with mem=128G. I've not tried 192G or other number. I just
started debugging.....

I'll try with :
>    d->arch.physaddr_bitsize =
> >            fls((1UL << 32) - HYPERVISOR_COMPAT_VIRT_START(d)) - 1
> >              + (PAGE_SIZE - 2);
> >    which is set to 0x1019, totally baffling me. I'd expect it to be 32,
> >    36, or 64????????

>PAGE_SIZE should be PAGE_SHIFT. If you fix that then you may discover ...

thanks
mukesh




_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel