On 02/08/2019 05:51, Juergen Gross wrote:
> On 02.08.19 04:15, Andy Smith wrote:
>> Hi,
>>
>> On Mon, Jul 22, 2019 at 01:06:03PM +0100, Andrew Cooper wrote:
>>> On 22/07/2019 10:16, Jan Beulich wrote:
>>>> On 21.07.2019 22:06, Andy Smith wrote:
>>>>> (XEN) Adding cpu 1 to runqueue 0
>>>>> (XEN) CPU 1 still not dead...
>>>>> (XEN) CPU 1 still not dead...
>>>>> (XEN) CPU 1 still not dead...
>>>>> (XEN) CPU 1 still not dead...
>>
>> […]
>>
>>> Does reverting back to credit1 make the issue go away?
>>
>> Yes, I don't see this with sched=credit, smt=0 and SMT enabled in
>> the BIOS:
>>
>> (XEN) microcode: CPU2 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU4 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU6 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU8 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU10 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU12 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) microcode: CPU14 updated from revision 0x2000057 to 0x200005e,
>> date = 2019-04-02
>> (XEN) Brought up 8 CPUs
>> (XEN) Parked 8 CPUs
>
> This will be cured by my core scheduling series. As I don't think we
> want to wait for that to go in I can isolate the related patches and
> post them.

Please do.  The fix for this really wants to go back to all staging trees.

~Andrew

P.S. isn't it lovely when reported bugs are already fixed.  I could get
used to this...

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