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

To: Teck Choon Giam <giamteckchoon@xxxxxxxxx>
Subject: Re: [Xen-devel] kernel BUG at arch/x86/xen/mmu.c:1860!
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Tue, 4 Jan 2011 13:48:54 +0000
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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.


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