Re: [Xen-devel] kernel BUG at arch/x86/xen/mmu.c:1860!

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

On Tue, Jan 4, 2011 at 9:48 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:

On Sun, 2010-12-26 at 08:16 +0000, Teck Choon Giam wrote:
>
> Triggered BUG() in line 1860:
>
> static void pin_pagetable_pfn(unsigned cmd, unsigned long pfn)
> {
>         struct mmuext_op op;
>         op.cmd = cmd;
>         op.arg1.mfn = pfn_to_mfn(pfn);
>            if (HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF))
>                    BUG(); <<THIS ONE?
> }

A failure to pin/unpin is usually associated with a log message from the
hypervisor. Please can you attempt to capture the full host log, e.g.
using serial console.

See http://wiki.xen.org/xenwiki/XenParavirtOps under "Are there more
debugging options I could enable to troubleshoot booting problems?" for
some details.

I will once I got the serial console cable and have a system to catch the log during my next visit to the DC.

Thanks.

Kindest regards,
Giam Teck Choon

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