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

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Mon, Feb 21, 2011 at 11:28 PM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> On Mon, Feb 21, 2011 at 11:15:39AM -0500, Konrad Rzeszutek Wilk wrote:
>> On Mon, Feb 21, 2011 at 02:58:53PM +0100, Guido Hecken wrote:
>> > Pasi,
>> > thanks for the quick response.
>> >
>> > As mentioned in previous posts, creating and afterwards deleting snapshots 
>> > crashes the system.
>> > I can do the following commands only twice, max. three times, before the 
>> > server crashes.
>>
>> You need these two patches:
>>
>> b2464c422fb44275deeb5770b668351860f68e0e
>> "x86: hold mm->page_table_lock while doing vmalloc_sync"
>> a8bf92faf72dba6e0dd2130256cb81c3e68f672b
>> "vmalloc: eagerly clear ptes on vunmap".
>>
>
> Sounds like someone should open a bugreport to debian
> to add these patches to their kernel.
>
> Those patches have been in xen/stable-2.6.32.x branch for around 5 months..

It might not be those patches that fixed the bug.

I was testing latest xen/stable-2.6.32.x (currently at 2.6.32.27,
definitely has those patches) with zvol when I got the bug, which
manifests itself when starting 4 domUs at boot using xendomains
service. So I tried xen/next-2.6.32 (which was just updated to
2.6.32.28), works fine so far.

So to Guido, if you have time, please try using both
xen/stable-2.6.32.x and xen/next-2.6.32 to verify which version can
solve your problem. Regarding your concern about non-standard systems,
"make-kpkg" might help
(http://newbiedoc.sourceforge.net/system/kernel-pkg.html).

-- 
Fajar

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