Re: [Xen-devel] BUG at drivers/xen/balloon.c:353

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 10.09.13 at 18:12, Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> wrote:
> Now that we are on Linux 3.4.y, I am once again trying to commission
> my pair of weevils.  Things are better than they were but it's still
> totally broken.
> 
> Below you can see the logs from my adhoc osstest flight 19169.  I
> looked at one of the save/restore failures (test-amd64-i386-xl) and
> see this:
> 
> Sep 10 00:03:09.073066 [  240.142970] kernel BUG at 
> drivers/xen/balloon.c:353!
> 
> I'd appreciate any help available with debugging this.  The logs are
> here:
> 
>   
> http://www.chiark.greenend.org.uk/~xensrcts/logs/19169/test-amd64-i386-xl/info
>  
> .html
> 
> I looked at the code in balloon.c:
> 
>               BUG_ON(!xen_feature(XENFEAT_auto_translated_physmap) &&
>                      phys_to_machine_mapping_valid(pfn));
> 
> Ian.
> 
> Sep 10 00:03:08.629133 [  240.142955] ------------[ cut here ]------------
> Sep 10 00:03:09.073066 [  240.142970] kernel BUG at drivers/xen/balloon.c:353!
> Sep 10 00:03:09.073102 [  240.142974] invalid opcode: 0000 [#1] SMP 
> Sep 10 00:03:09.081064 [  240.142978] Modules linked in: xen_acpi_processor 
> xen_gntalloc ext4 jbd2 mbcache e1000e
> Sep 10 00:03:09.093059 [  240.142987] CPU: 6 PID: 847 Comm: kworker/6:1 Not 
> tainted 3.11.0+ #1

But that's 3.11, and we had seen this very failure in logs on other
hosts. Did you try 3.4 on those systems?

Jan


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