Re: WARNING: CPU: 112 PID: 2041 at kernel/sched/sched.h:1453
From: Dietmar Eggemann <dietmar.eggemann@arm.com>
Date: 2021-08-02 08:43:49
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On 30/07/2021 17:23, Bruno Goncalves wrote:
On Fri, Jul 30, 2021 at 2:22 PM Dietmar Eggemann [off-list ref] wrote:quoted
On 29/07/2021 16:38, Dietmar Eggemann wrote:quoted
On 29/07/2021 14:36, Bruno Goncalves wrote:quoted
On Wed, Jul 28, 2021 at 5:55 PM Dietmar Eggemann [off-list ref] wrote:quoted
On 28/07/2021 15:11, Bruno Goncalves wrote:
[...]
quoted
The task causing this seem to be the new `cppc_fie` DL task introduced by commit 1eb5dde674f5 "cpufreq: CPPC: Add support for frequency invariance" in v5.14-rc1. With `CONFIG_ACPI_CPPC_CPUFREQ_FIE=y` and schedutil cpufreq governor on slow-switching system: DL task curr=`sugov:X` makes p=`cppc_fie` migrate and since it is in `non_contending` state, migrate_task_rq_dl() calls sub_running_bw()->__sub_running_bw()->cpufreq_update_util()-> rq_clock()->assert_clock_updated() on p. Can you try this snippet? It should fix it.Thank you, I've tried the patch and it fixes the issue.
Thanks for testing! Let me send out a proper patch then. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel