Re: [PATCH v5 1/1] cpuhp: Expedite RCU when toggling system-wide SMT mode

Shrikanth Hegde <[email protected]> Tue, 21 Jul 2026 10:01:34 +0530

Newsgroups	org.kernel.vger.rcu,org.kernel.vger.linux-kernel
Message-ID	<[email protected]>


On 6/16/26 11:39 AM, Shrikanth Hegde wrote:
> 
> 

>>>
>>> On a large config system with 1920 CPUs, completion time improves from
>>> ~1 hour to 5-6 minutes.
>>>
>>> Tested-by: Samir <[email protected]>
>>> Reviewed-by: Shrikanth Hegde <[email protected]>
>>> Signed-off-by: Vishal Chourasia <[email protected]>
>>
>>  From an RCU viewpoint:
>>
>> Reviewed-by: Paul E. McKenney <[email protected]>
> 
> Thank you Paul for reviewing this.
> 
>>
>> I am guessing that you will be taking this up some other path, but if
>> you would like it to to via RCU, please let me know.
>>
>>                             Thanx, Paul
>>
> 
> I would prefer this to go via tip tree since main change is in cpu.c
> 
> Thomas, peter,
> What do you guys suggest? can this go via tip tree?
> 
> Also, do you have any other review comments on this or test to be done?
>

Gentle Ping.

Thomas, Peter, Ingo, Can this go via tip tree?
Do you guys have any comments to be addressed?

Or Do you want it to go via RCU tree?