Date:   Wed, 1 Mar 2023 17:03:22 +0000
From:   Qais Yousef <qyousef@layalina.io>
To:     Juri Lelli <juri.lelli@redhat.com>
Cc:     Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Waiman Long <longman@redhat.com>,
        Steven Rostedt <rostedt@goodmis.org>, tj@kernel.org,
        linux-kernel@vger.kernel.org, luca.abeni@santannapisa.it,
        claudio@evidence.eu.com, tommaso.cucinotta@santannapisa.it,
        bristot@redhat.com, mathieu.poirier@linaro.org,
        cgroups@vger.kernel.org,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Wei Wang <wvw@google.com>, Rick Yiu <rickyiu@google.com>,
        Quentin Perret <qperret@google.com>,
        Heiko Carstens <hca@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Zefan Li <lizefan.x@bytedance.com>, linux-s390@vger.kernel.org,
        x86@kernel.org
Subject: Re: [PATCH v3] sched: cpuset: Don't rebuild root domains on
 suspend-resume
Message-ID: <20230301170322.xthlso7jfkixlyex@airbuntu>
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 <5a1e58bf-7eb2-bd7a-7e19-7864428a2b83@arm.com>
 <20230228174627.vja5aejq27dsta2u@airbuntu>
 <Y/7/SLzvK8LfB29z@localhost.localdomain>
 <20230301122852.zgzreby42lh2zf6w@airbuntu>
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On 03/01/23 15:26, Juri Lelli wrote:
> On 01/03/23 12:28, Qais Yousef wrote:
> > On 03/01/23 08:31, Juri Lelli wrote:
> 
> ...
> 
> > > Not ignoring you guys here, but it turns out I'm quite bogged down with
> > > other stuff at the moment. :/ So, apologies and I'll try to get to this
> > > asap. Thanks a lot for all your efforts and time reviewing so far!
> > 
> > Np, I can feel you :-)
> 
> Eh. :/

I hope I did not offend. That was meant as no pressure, I understand.

> 
> BTW, do you have a repro script of some sort handy I might play with?

Sorry no. You'll just need to suspend to ram. I had a simple patch to measure
the time around the call and trace_printk'ed the result.

I was working on a android phone which just suspends to ram if you turn the
screen off and disconnect the usb.

I think you can use rtcwake in normal desktop environment. Something like

	sudo rtcwake -u -s 5 -m mem


Thanks!

--
Qais Yousef