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Date: Thu, 18 Feb 2016 18:37:19 +0100 From: "Rafael J. Wysocki" <rafael@...nel.org> To: Viresh Kumar <viresh.kumar@...aro.org> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>, Linux PM list <linux-pm@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 6/12] cpufreq: governor: Fix CPU load information updates via ->store On Thu, Feb 18, 2016 at 6:44 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote: > On 18-02-16, 02:26, Rafael J. Wysocki wrote: >> Index: linux-pm/drivers/cpufreq/cpufreq_ondemand.c >> =================================================================== >> --- linux-pm.orig/drivers/cpufreq/cpufreq_ondemand.c >> +++ linux-pm/drivers/cpufreq/cpufreq_ondemand.c >> @@ -29,6 +29,7 @@ >> >> static DEFINE_PER_CPU(struct od_cpu_dbs_info_s, od_cpu_dbs_info); >> >> +static struct dbs_governor od_dbs_gov; >> static struct od_ops od_ops; >> >> static unsigned int default_powersave_bias; >> @@ -222,7 +223,6 @@ static ssize_t store_io_is_busy(struct d >> { >> unsigned int input; >> int ret; >> - unsigned int j; >> >> ret = sscanf(buf, "%u", &input); >> if (ret != 1) >> @@ -230,12 +230,8 @@ static ssize_t store_io_is_busy(struct d >> dbs_data->io_is_busy = !!input; >> >> /* we need to re-evaluate prev_cpu_idle */ >> - for_each_online_cpu(j) { >> - struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info, >> - j); >> - dbs_info->cdbs.prev_cpu_idle = get_cpu_idle_time(j, >> - &dbs_info->cdbs.prev_cpu_wall, dbs_data->io_is_busy); >> - } > > We weren't doing ignore_nice_load check here, but will be done after > this patch. Will that make a different? Yes, IMO failing to update prev_cpu_nice if ignore_nice_load is set is at least inconsistent with the other updates. > And then this should be mentioned in the log as well ? OK, I'll update the changelog to mention that. > Apart from that. > > Acked-by: Viresh Kumar <viresh.kumar@...aro.org> Thanks!
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