Re: resume from S3 sleep not working in Dom0 - Xen4.2.1

[Tomasz Wroblewski <tomasz.wroblewski@citrix.com>]

>> Thanks Konrad. I've tried your patches, and whilst I have not seen this
>> crash in cpuidle_register anymore, the others are still present (in
>> build_schedule_domains for example).
>>
>>      
> That looks familiar too. I think it got fixed in the upstream kernel
> and it was a generic bug - but I can't recall which commit it was.
>
>    
Aha, all right.
>> I've stumbled on a bit of interesting info - using dom0_vcpus_pin on xen
>> commandline stops both the xen scheduler and dom0 kernel crashing and all
>> works fine - made dozens of succesfull s3 attempts. Was wondering if you
>> guys had any thoughts on this? Is the dom0 kernel even supposed to cope
>> during s3 in non dom0 vcpu pin case?
>>
>>      
> No that is something new. Is this only an issue on Intel boxes but not AMD?
>    
I think it was primarily reproducible on sandybridge intels whilst being 
hard/impossible to repro on Ivy Bridge - and sorry - don't have an AMD 
box to make a test. It might just go away with newer kernel though, I 
think we're in the process of updating to 3.8 (previous tests were on 
3.2) so will be worth trying on that.