From: Shrikanth Hegde <sshegde@linux.ibm.com>
To: paulmck@kernel.org, tglx@linutronix.de, peterz@infradead.org,
Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, rcu@vger.kernel.org,
aboorvad@linux.ibm.com, boqun.feng@gmail.com,
frederic@kernel.org, joelagnelf@nvidia.com,
josh@joshtriplett.org, neeraj.upadhyay@kernel.org,
rostedt@goodmis.org, srikar@linux.ibm.com, urezki@gmail.com,
Vishal Chourasia <vishalc@linux.ibm.com>,
samir@linux.ibm.com
Subject: Re: [PATCH v5 1/1] cpuhp: Expedite RCU when toggling system-wide SMT mode
Date: Tue, 21 Jul 2026 10:01:34 +0530 [thread overview]
Message-ID: <e143d10e-69b1-455d-90b3-5f29a9482c15@linux.ibm.com> (raw)
In-Reply-To: <4bd12c51-414d-49b5-8fce-2a6e73a479fa@linux.ibm.com>
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 <samir@linux.ibm.com>
>>> Reviewed-by: Shrikanth Hegde <sshegde@linux.ibm.com>
>>> Signed-off-by: Vishal Chourasia <vishalc@linux.ibm.com>
>>
>> From an RCU viewpoint:
>>
>> Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
>
> 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?
next prev parent reply other threads:[~2026-07-21 4:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-15 4:25 [PATCH v5 0/1] " Vishal Chourasia
2026-06-15 4:25 ` [PATCH v5 1/1] " Vishal Chourasia
2026-06-15 15:05 ` Paul E. McKenney
2026-06-16 6:09 ` Shrikanth Hegde
2026-07-21 4:31 ` Shrikanth Hegde [this message]
2026-07-29 14:53 ` Shrikanth Hegde
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