Re: [Xen-devel] Only CPU0 active after ACPI S3, xen 4.1.3

[Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On 21.12.2012 14:59, Marek Marczykowski wrote:
> On 21.12.2012 14:42, Jan Beulich wrote:
>>>>> On 21.12.12 at 14:33, Marek Marczykowski <marmarek@xxxxxxxxxxxxxxxxxxxxxx>
>> wrote:
>>> On 21.12.2012 09:55, Jan Beulich wrote:
>>>>>>> On 21.12.12 at 05:52, Marek Marczykowski 
>>>>>>> <marmarek@xxxxxxxxxxxxxxxxxxxxxx> 
>>> wrote:
>>>>> On 21.12.2012 00:17, Marek Marczykowski wrote:
>>>>>> With this patch applied (on 4.1.4 and 4.3-unstable), I've got original 
>>>>> symptom
>>>>>> - only CPU0 active after ACPI S3. Didn't get reboot after few tries.
>>>>>> "xl debug-key r" output attached.
>>>>>> Anyway it looks like bug was introduced somehow between 4.1.2 and 4.1.3 
>>>>>> - on
>>>>>> 4.1.2 none of above problems happened.
>>>>>
>>>>> I've done bisect on xen 4.1 and found problematic commit:
>>>>> http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/1f95b55ef427 
>>>>
>>>> In that case, using "sched_ratelimit_us=0" should make the
>>>> problem go away again - did you try that?
>>>
>>> This option does not help when trying 4.1.4, but does when trying xen 
>>> compiled
>>> from above c/s.
>>
>> Which basically calls for you doing another bisection round, this
>> time with that option in place.
> 
> Will try, but not sure if will have time for it before Christmas.

Next bisection (this time with sched_ratelimit_us=0) gives this commit:
http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/d67e4d12723f

I've tried also xen-4.1 tip with Ben's patch and sched_ratelimit_us=0, but it
didn't worked well - got all vCPUs on pCPU 0, instead on reboot (more common
effect). Not sure if this is really different effect or just non-deterministic
behavior of the same bug.

-- 
Best Regards / Pozdrawiam,
Marek Marczykowski
Invisible Things Lab

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