Ping: [PATCH 4/4] x86/APIC: restrict certain messages to BSP

[Jan Beulich <jbeulich@xxxxxxxx>]

On 16.03.2020 10:10, Jan Beulich wrote:
> On 13.03.2020 17:18, Andrew Cooper wrote:
>> On 13/03/2020 09:26, Jan Beulich wrote:
>>> All CPUs get an equal setting of EOI broadcast suppression; no need to
>>> log one message per CPU, even if it's only in verbose APIC mode.
>>>
>>> Only the BSP is eligible to possibly get ExtINT enabled; no need to log
>>> that it gets disabled on all APs, even if - again - it's only in verbose
>>> APIC mode.
>>
>> How true is this in practice?
> 
> I guess you read "eligible" as "in theory", whereas it is meant as "with
> how our [and in particular this] code is working right now". Even if we
> decided to switch the CPU to handle ExtINT, it still wouldn't need to be
> one message per CPU - it would suffice to issue the message for the one
> CPU getting ExtINT enabled.

Are you okay with the above explanation, and hence willing to give an
ack? If not, what alternative suggestion do you have to limit this
particular part of the log spam on very-many-CPU systems?

Jan