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sched: walt: Fix cpu_capacity_orig stuck issue

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thermal_cap() should return the capacity corresponding to the
maximum frequency allowed by the thermal on a given CPU. If thermal
driver did not notify the limits not even once, thermal_cap()
fallback to CPU's cpu_capacity_orig since thermal_cap_cpu[] is not
initialized. In this case, if cpu_capacity_orig is clipped via
cpufreq policy limits, it would stuck there, even after the policy
limits are restored. Fix this issue by returning SCHED_CAPACITY_SCALE
as the capacity when thermal_cap_cpu[] is not initialized. The
cpu_capacity_orig is limited by arch_scale_cpu_capacity().

Change-Id: Ic0dda6ef28973ecf4e908df8c12e30585e320bf4
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
This commit is contained in:
Pavankumar Kondeti
2018-01-11 13:46:20 +05:30
parent 1c7b30fefb
commit f85a9dec59
1 changed files with 2 additions and 2 deletions
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4
kernel/sched/walt.c
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
* Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -2915,7 +2915,7 @@ static unsigned long thermal_cap_cpu[NR_CPUS];
unsigned long thermal_cap(int cpu)
{
return thermal_cap_cpu[cpu] ?: cpu_rq(cpu)->cpu_capacity_orig;
return thermal_cap_cpu[cpu] ?: SCHED_CAPACITY_SCALE;
}
unsigned long do_thermal_cap(int cpu, unsigned long thermal_max_freq)