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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> 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.

Are you saying that on 4.1.4 this doesn't take effect? Are there
any log messages indicating so? The above being the top most
change to sched_credit.c, this difference in behavior pretty odd.

On 4.2, this wouldn't be surprising, given that without -unstable
c/s 26266:8d209624ea83 the =0 special case didn't get handled
(broken by 24880:dd9e8f1ebed1).

Jan


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