From: Ulf Hansson <ulf.hansson@linaro.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: "Rafael J . Wysocki" <rafael@kernel.org>,
Sudeep Holla <sudeep.holla@arm.com>,
linux-pm@vger.kernel.org,
Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Nikunj Kela <nkela@quicinc.com>,
Prasad Sodagudi <psodagud@quicinc.com>,
Maulik Shah <quic_mkshah@quicinc.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
linux-rt-users@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/6] pmdomain/cpuidle-psci: Support s2idle/s2ram on PREEMPT_RT
Date: Tue, 30 Apr 2024 12:42:26 +0200 [thread overview]
Message-ID: <CAPDyKFpMga4DweVoLdW80mvfGr8vrQ5yNMcU_wgqWQuoLdo6+w@mail.gmail.com> (raw)
In-Reply-To: <20240430094411.HyS2Gecw@linutronix.de>
On Tue, 30 Apr 2024 at 11:44, Sebastian Andrzej Siewior
<bigeasy@linutronix.de> wrote:
>
> On 2024-04-29 16:05:25 [+0200], Ulf Hansson wrote:
> > The hierarchical PM domain topology and the corresponding domain-idle-states
> > are currently disabled on a PREEMPT_RT based configuration. The main reason is
> > because spinlocks are turned into sleepable locks on PREEMPT_RT, which means
> > genpd and runtime PM can't be use in the atomic idle-path when
> > selecting/entering an idle-state.
> >
> > For s2idle/s2ram this is an unnecessary limitation that this series intends to
> > address. Note that, the support for cpuhotplug is left to future improvements.
> > More information about this are available in the commit messages.
> >
> > I have tested this on a Dragonboard 410c.
>
> Have you tested this with PREEMPT_RT enabled and if so, which kernel?
Yes, of course. :-) I should have mentioned this in the cover-letter, sorry.
I have used the linux-rt-devel.git, which had a branch based upon
v6.8-rc7 a while ago, that I used when I did my tests.
The series needed a small rebase on top of my linux-pm tree [1],
before I could post it though. I also tested the rebased series, but
then of course then not with PREEMPT_RT, but to make sure there are no
regressions.
Kind regards
Uffe
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/linux-pm.git next
prev parent reply other threads:[~2024-04-30 10:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 14:05 [PATCH 0/6] pmdomain/cpuidle-psci: Support s2idle/s2ram on PREEMPT_RT Ulf Hansson
2024-04-29 14:05 ` [PATCH 1/6] pmdomain: core: Enable s2idle for CPU PM domains " Ulf Hansson
2024-04-29 14:05 ` [PATCH 2/6] pmdomain: core: Don't hold the genpd-lock when calling dev_pm_domain_set() Ulf Hansson
2024-04-29 14:05 ` [PATCH 3/6] cpuidle: psci-domain: Enable system-wide suspend on PREEMPT_RT Ulf Hansson
2024-04-29 14:05 ` [PATCH 4/6] cpuidle: psci: Drop redundant assignment of CPUIDLE_FLAG_RCU_IDLE Ulf Hansson
2024-04-29 14:05 ` [PATCH 5/6] cpuidle: psci: Enable the hierarchical topology for s2ram on PREEMPT_RT Ulf Hansson
2024-04-29 14:05 ` [PATCH 6/6] cpuidle: psci: Enable the hierarchical topology for s2idle " Ulf Hansson
2024-04-30 9:44 ` [PATCH 0/6] pmdomain/cpuidle-psci: Support s2idle/s2ram " Sebastian Andrzej Siewior
2024-04-30 10:42 ` Ulf Hansson [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAPDyKFpMga4DweVoLdW80mvfGr8vrQ5yNMcU_wgqWQuoLdo6+w@mail.gmail.com \
--to=ulf.hansson@linaro.org \
--cc=Lorenzo.Pieralisi@arm.com \
--cc=bigeasy@linutronix.de \
--cc=daniel.lezcano@linaro.org \
--cc=krzysztof.kozlowski@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-rt-users@vger.kernel.org \
--cc=nkela@quicinc.com \
--cc=psodagud@quicinc.com \
--cc=quic_mkshah@quicinc.com \
--cc=rafael@kernel.org \
--cc=sudeep.holla@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).