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Wysocki" , Len Brown , Pavel Machek , Greg Kroah-Hartman , Kevin Hilman , Daniel Lezcano , Lorenzo Pieralisi , Sudeep Holla , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Adrien Thierry , Brian Masney , linux-rt-users@vger.kernel.org References: <20221219151503.385816-1-krzysztof.kozlowski@linaro.org> <20221219151503.385816-2-krzysztof.kozlowski@linaro.org> <9771639f-5172-8f3b-3ce6-8fd195aa95b3@linaro.org> From: Krzysztof Kozlowski In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230112_032747_416187_FC54F3AD X-CRM114-Status: GOOD ( 13.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/01/2023 11:36, Sebastian Andrzej Siewior wrote: > 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? This was generic comment that system is not supposed to go into deeper idle states. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel