From: Sudeep Holla <sudeep.holla@arm.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
Sudeep Holla <sudeep.holla@arm.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Adrien Thierry <athierry@redhat.com>,
Brian Masney <bmasney@redhat.com>,
linux-rt-users@vger.kernel.org
Subject: Re: [PATCH v3] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT
Date: Wed, 25 Jan 2023 11:19:57 +0000 [thread overview]
Message-ID: <20230125111957.uzf2hli5md2pm43n@bogus> (raw)
In-Reply-To: <CAPDyKFrS6OER2h3XmHMfbjBA09HT8LYN9A90TPjd0RPim3jMaw@mail.gmail.com>
On Wed, Jan 25, 2023 at 11:08:04AM +0100, Ulf Hansson wrote:
> On Wed, 25 Jan 2023 at 08:43, Krzysztof Kozlowski
> <krzysztof.kozlowski@linaro.org> wrote:
> >
> > On 24/01/2023 16:34, Sudeep Holla wrote:
[...]
> > > Any particular reason for even compiling this file in or allowing the
> > > ARM_PSCI_CPUIDLE when PREEMPT_RT=y ? If we can't enter idle states, we
> > > can as well compile this file out ?
> >
> > It's the power domain sued for other devices, so we need it. Otherwise
> > other devices will keep waiting for this missing power domain provider.
>
> Yes.
>
> And we are still able to use those idle states that are solely per
> CPU, which is probably nice to have. No?
>
Makes sense, thanks for the explanation. Also the other discussions clears
probably questions I had.
--
Regards,
Sudeep
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next prev parent reply other threads:[~2023-01-25 11:21 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 18:42 [PATCH v3] cpuidle: psci: Do not suspend topology CPUs on PREEMPT_RT Krzysztof Kozlowski
2023-01-24 10:33 ` Ulf Hansson
2023-01-25 10:44 ` Krzysztof Kozlowski
2023-01-24 15:34 ` Sudeep Holla
2023-01-25 7:42 ` Krzysztof Kozlowski
2023-01-25 10:08 ` Ulf Hansson
2023-01-25 11:19 ` Sudeep Holla [this message]
2023-01-30 10:04 ` Sebastian Andrzej Siewior
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