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xen-devel
Re: [Xen-devel] pvops domu soft lockup under load (more logs)
On Apr 14, 2010, at 19:48 , Jeremy Fitzhardinge wrote:
> On 04/12/2010 02:44 AM, Pim van Riezen wrote:
>> On Apr 10, 2010, at 9:12 , Pim van Riezen wrote:
>>
>>
>>>> When you're getting lockups, could you capture the output of sysrq-t (xm
>>>> sysrq <domain> t, or "Ctrl-O t" on the domain's console)?
>>>>
>>> This one is going to be a bit tough. I only get the error after the fact.
>>> The domain has multiple vcpu's, so it's usually not apparent that it's
>>> hanging, all depending on which process gets stuck. I'll keep poking at it
>>> and if I manage to catch it in the act I'll follow up with a sysrq-t.
>>>
>> xm sysrq $vps t doesn't seem to add anything to the console. Am I doing it
>> wrong?
>>
>
> Does it appear on the Xen console (visible with "xm dmesg")? You may
> need to do a sysrq '9' first to get it to output all messages.
I tried:
xm sysrq $vps 9
xm sysrq $vps t
nothing shows up on the guest's console, nor in xm dmesg.
Same for doing ^O-9 ^O-t / ^o-9 / ^o-t on the guest's console.
CONFIG_MAGIC_SYSRQ is enabled in the domU kernel.
Pi
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