From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Kevin Hilman <khilman@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Sudeep Holla <sudeep.holla@arm.com>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Adrien Thierry <athierry@redhat.com>,
Brian Masney <bmasney@redhat.com>,
linux-rt-users@vger.kernel.org
Subject: Re: [PATCH v2 1/5] PM: domains: Add GENPD_FLAG_RT_SAFE for PREEMPT_RT
Date: Thu, 12 Jan 2023 11:36:15 +0100 [thread overview]
Message-ID: <Y7/inz5ZoQiR3bP3@linutronix.de> (raw)
In-Reply-To: <9771639f-5172-8f3b-3ce6-8fd195aa95b3@linaro.org>
On 2023-01-06 15:52:57 [+0100], Krzysztof Kozlowski wrote:
> > Just so I don't get this wrong, since the cpuidle-psci also calls
> > pm_runtime_* functions so it isn't PREEMPT_RT safe, at least not yet?
>
> You are correct. Patch 3 here addresses it by... just not doing runtime
> PM. This is a hacky workaround but:
> 1. I don't have any other idea,
> 2. It's not a big problem because RT systems are not supposed to have
> any CPU idle (one of first things during RT system tuning is to disable
> cpuidle).
so you say you use idle=poll instead?
> Best regards,
> Krzysztof
Sebastian
next prev parent reply other threads:[~2023-01-12 10:42 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-19 15:14 [PATCH v2 0/5] PM: Fixes for Realtime systems Krzysztof Kozlowski
2022-12-19 15:14 ` [PATCH v2 1/5] PM: domains: Add GENPD_FLAG_RT_SAFE for PREEMPT_RT Krzysztof Kozlowski
2023-01-04 15:45 ` Ulf Hansson
2023-01-06 14:52 ` Krzysztof Kozlowski
2023-01-12 10:36 ` Sebastian Andrzej Siewior [this message]
2023-01-12 11:27 ` Krzysztof Kozlowski
2023-01-12 10:32 ` Sebastian Andrzej Siewior
2023-01-12 11:31 ` Krzysztof Kozlowski
2022-12-19 15:15 ` [PATCH v2 2/5] cpuidle: psci: Mark as PREEMPT_RT safe Krzysztof Kozlowski
2023-01-12 11:00 ` Sebastian Andrzej Siewior
2023-01-12 11:32 ` Krzysztof Kozlowski
2023-01-17 15:27 ` Ulf Hansson
2023-01-19 15:40 ` Krzysztof Kozlowski
2023-01-19 17:06 ` Krzysztof Kozlowski
2022-12-19 15:15 ` [PATCH v2 3/5] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT Krzysztof Kozlowski
2023-01-12 11:09 ` Sebastian Andrzej Siewior
2023-01-12 11:34 ` Krzysztof Kozlowski
2023-01-30 9:51 ` Sebastian Andrzej Siewior
2022-12-19 15:15 ` [PATCH v2 4/5] PM: Allow calling dev_pm_domain_set() with raw spinlock Krzysztof Kozlowski
2023-01-12 11:13 ` Sebastian Andrzej Siewior
2022-12-19 15:15 ` [PATCH v2 5/5] PM: domains: Do not call device_pm_check_callbacks() when holding genpd_lock() Krzysztof Kozlowski
2023-01-12 11:31 ` Sebastian Andrzej Siewior
2023-01-12 11:37 ` Krzysztof Kozlowski
2023-01-17 15:11 ` Ulf Hansson
2023-01-19 15:58 ` Krzysztof Kozlowski
2022-12-20 21:36 ` [PATCH v2 0/5] PM: Fixes for Realtime systems Adrien Thierry
2023-01-04 15:15 ` Ulf Hansson
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=Y7/inz5ZoQiR3bP3@linutronix.de \
--to=bigeasy@linutronix.de \
--cc=athierry@redhat.com \
--cc=bmasney@redhat.com \
--cc=daniel.lezcano@linaro.org \
--cc=gregkh@linuxfoundation.org \
--cc=khilman@kernel.org \
--cc=krzysztof.kozlowski@linaro.org \
--cc=len.brown@intel.com \
--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=lpieralisi@kernel.org \
--cc=pavel@ucw.cz \
--cc=rafael@kernel.org \
--cc=sudeep.holla@arm.com \
--cc=ulf.hansson@linaro.org \
/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