Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1189842

Re: [PATCH] cpupower: Do not change the frequency of offline cpu

Show all headers | View raw

On Wednesday, July 22, 2015 01:50:49 PM Shilpasri G Bhat wrote:
> Check if the cpu is online before changing the frequency/governor of
> the cpu.
> 
> Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
> ---
>  tools/power/cpupower/utils/cpufreq-set.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/power/cpupower/utils/cpufreq-set.c
> b/tools/power/cpupower/utils/cpufreq-set.c index f656e58..4e21357 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) {

Thanks for catching this one and sending a patch!

Acked-by: Thomas Renninger <trenn@suse.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] cpupower: Do not change the frequency of offline cpu Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2015-07-22 10:30 +0200
  Re: [PATCH] cpupower: Do not change the frequency of offline cpu Thomas Renninger <trenn@suse.de> - 2015-07-22 13:50 +0200
  Re: [PATCH] cpupower: Do not change the frequency of offline cpu Gautham R Shenoy <ego@linux.vnet.ibm.com> - 2015-07-23 07:20 +0200
  [RESEND PATCH] cpupower: Do not change the frequency of offline cpu Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2015-07-23 09:00 +0200

csiph-web