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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-24 13:08:47 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-24 13:08:47 +0400 |
| commit | a0e5af3cb89b59aa6c62b1f97c8d553ff3fb51c1 (patch) | |
| tree | 59e31166d9a0317009dc47383edd92e9e1012cca /drivers/cpufreq | |
| parent | d3c31a773fa33f78a29bb00ed0dcf8fa55dd4b3a (diff) | |
| download | linux-a0e5af3cb89b59aa6c62b1f97c8d553ff3fb51c1.tar.xz | |
cpufreq: governors: Fix jiffies/cputime mixup (revisited)
This change was made by commit 8636fd2 (cpufreq: fix jiffies/cputime
mixup in conservative/ondemand governors) before, but then it has
been reverted inadvertently by commit 4471a34 (cpufreq: governors:
remove redundant code).
The changelog of commit 8636fd2's says:
The function get_cpu_idle_time_jiffy in both the conservative and
ondemand governors use jiffies_to_usecs to convert a cputime value
to usecs which gives the wrong value on architectures where cputime
and jiffies use different units. Only matters if NO_HZ is
disabled, since otherwise get_cpu_idle_time_us should already
return a valid value, and get_cpu_idle_time_jiffy isn't actually
called.
Since now we have only one common get_cpu_idle_time_jiffy() used by
both governors in question, modify it along the lines of commit
8636fd2 to restore the correct behavior.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/cpufreq_governor.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq_governor.c b/drivers/cpufreq/cpufreq_governor.c index be9d255e292f..6c5f1d383cdc 100644 --- a/drivers/cpufreq/cpufreq_governor.c +++ b/drivers/cpufreq/cpufreq_governor.c @@ -45,9 +45,9 @@ static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall) idle_time = cur_wall_time - busy_time; if (wall) - *wall = jiffies_to_usecs(cur_wall_time); + *wall = cputime_to_usecs(cur_wall_time); - return jiffies_to_usecs(idle_time); + return cputime_to_usecs(idle_time); } u64 get_cpu_idle_time(unsigned int cpu, u64 *wall) |