From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Ulf Hansson <ulf.hansson@linaro.org>
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 11:44:11 +0200 [thread overview]
Message-ID: <20240430094411.HyS2Gecw@linutronix.de> (raw)
In-Reply-To: <20240429140531.210576-1-ulf.hansson@linaro.org>
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?
> Kind regards
> Ulf Hansson
Sebastian
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next prev parent reply other threads:[~2024-04-30 9:44 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 ` Sebastian Andrzej Siewior [this message]
2024-04-30 10:42 ` [PATCH 0/6] pmdomain/cpuidle-psci: Support s2idle/s2ram " Ulf Hansson
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