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

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Message-ID: <20221011191203.GA1051279@lothringen>
Date:   Tue, 11 Oct 2022 21:12:03 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Xiongfeng Wang <wangxiongfeng2@...wei.com>
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

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

Thanks.