Re: [PATCH v3 5/7] arm64: smp: remove cpu and numa topology information when hotplugging out CPU

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On 17/07/18 16:06, Geert Uytterhoeven wrote:
> Hi Sudeep,
> 
> On Tue, Jul 17, 2018 at 4:05 PM Sudeep Holla <sudeep.holla@xxxxxxx> wrote:
>> On Tue, Jul 17, 2018 at 02:58:14PM +0200, Geert Uytterhoeven wrote:
>>> On Fri, Jul 6, 2018 at 1:04 PM Sudeep Holla <sudeep.holla@xxxxxxx> wrote:

[...]

>>> All but CPU0 tested, as expected.
>>
>> OK, does the firmware on this system not allow CPU0 to be hotplugged out ?
> 
> Correct. But that's not the issue.
> 

Yes,  was just trying to understand the behavior.

[..]

>>> Woops, CPU5-7 are not tested.
>>
>> I don't understand what you mean by that. From the logs, it looks fine.
>> What do you mean by "CPU5-7 are not tested" ?
>> Sorry, but I am finding it hard to understand the issue from the log.
> 
> The above is not the log, but the diff between the log before and after the bad
> commit. So lines prefixed with "-" are no longer printed.
> Before, CPU4-7 were tested for hotplug in group 1.
> After, only CPU4 is tested for hotplug in group 1.
> 

Ah OK, I think I now understand what is the issue, will try to replicate
at my end and get back to you.

>> Also, it would be good to know your config. Is it defconfig - NUMA as before ?
> 
> arm64 defconfig + CONFIG_ARM_PSCI_CHECKER=y should do.
> 

OK thanks, that is simpler.

-- 
Regards,
Sudeep



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