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| author |   Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> | 2015-07-23 12:20:27 +0530 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-07-23 20:40:51 +0200 |
| commit | 2e5e8fd1ff9d802ab74df1ceaa5243da30491a45 (patch) | |
| tree | 17ef07278e16b9ad1fd0ce440725788e05a52db8 /tools/power | |
| parent | Linux 4.2-rc3 (diff) | |
| download | linux-dev-2e5e8fd1ff9d802ab74df1ceaa5243da30491a45.tar.xz linux-dev-2e5e8fd1ff9d802ab74df1ceaa5243da30491a45.zip | |
cpupower: Do not change the frequency of offline cpu
Check if the cpu is online before changing the frequency/governor of
the cpu.
Reported-by: Pavaman Subramaniyam <pavsubra@linux.vnet.ibm.com>
Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Acked-by: Thomas Renninger <trenn@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/cpupower/utils/cpufreq-set.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpufreq-set.c b/tools/power/cpupower/utils/cpufreq-set.c index f656e585ed45..4e213576381e 100644 --- a/tools/power/cpupower/utils/cpufreq-set.c +++ b/tools/power/cpupower/utils/cpufreq-set.c @@ -17,6 +17,7 @@ #include "cpufreq.h" #include "helpers/helpers.h" +#include "helpers/sysfs.h" #define NORM_FREQ_LEN 32 @@ -318,6 +319,9 @@ int cmd_freq_set(int argc, char **argv) cpufreq_cpu_exists(cpu)) continue; + if (sysfs_is_cpu_online(cpu) != 1) + continue; + printf(_("Setting cpu: %d\n"), cpu); ret = do_one_cpu(cpu, &new_pol, freq, policychange); if (ret) { |