linux-kernel - Re: [PATCH 00/20] rcu/context-tracking: Merge RCU eqs-dynticks counter to context tracking v5

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Message-ID: <38a2a38e-c04e-7820-b923-69211898ba56@huawei.com>
Date:   Wed, 12 Oct 2022 09:08:17 +0800
From:   Xiongfeng Wang <wangxiongfeng2@...wei.com>
To:     Frederic Weisbecker <frederic@...nel.org>
CC:     "Paul E . McKenney" <paulmck@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        "Phil Auld" <pauld@...hat.com>, Alex Belits <abelits@...vell.com>,
        "Nicolas Saenz Julienne" <nsaenz@...nel.org>,
        Marco Elver <elver@...gle.com>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Nicolas Saenz Julienne" <nsaenzju@...hat.com>,
        Max Filippov <jcmvbkbc@...il.com>,
        "Yu Liao" <liaoyu15@...wei.com>, Boqun Feng <boqun.feng@...il.com>,
        "Marcelo Tosatti" <mtosatti@...hat.com>,
        kernel test robot <lkp@...el.com>,
        "Paul Gortmaker" <paul.gortmaker@...driver.com>,
        Uladzislau Rezki <uladzislau.rezki@...y.com>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: Re: [PATCH 00/20] rcu/context-tracking: Merge RCU eqs-dynticks
 counter to context tracking v5

Hi, Frederic

On 2022/10/12 3:12, Frederic Weisbecker wrote:
> On Tue, Oct 11, 2022 at 07:37:48PM +0800, Xiongfeng Wang wrote:
>> Hi, Frederic
>>
>> Thanks for push RCU dynticks counters to upstream. It is very useful. After it
>> is done, do we have plan to revive the sys-idle feature and use it to shutdown
>> the tick on the last housekeeping when the whole system is idle. I'm very glad
>> to help test it if you have some demo patches on your personal repo.
> 
> There is no plan yet but some other people seem to be interested. Would you
> like to try to revive it yourself? Otherwise I may do it someday but I 

Thanks for your reply ! I would like to give it a try. But I'm not sure if I can
make it because I'm not so familiar with the RCU subsystem.

Thanks,
Xiongfeng

> have quite some work to complete first (ie: making CPU isolation tunable through
> cpusets).
> 
> Thanks.
> .
>