From: Junjie Wu <[email protected]> Timers are scheduled in unit of jiffies. Round up timer_rate so that it matches the actual sampling period.
Change-Id: I88386a5a448e40333f9a9b9f0cf72af58cb54656 Signed-off-by: Junjie Wu <[email protected]> Signed-off-by: Bálint Czobor <[email protected]> --- drivers/cpufreq/cpufreq_interactive.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index 95525b3..a2fc98a 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -852,12 +852,18 @@ static ssize_t store_timer_rate(struct cpufreq_interactive_tunables *tunables, const char *buf, size_t count) { int ret; - unsigned long val; + unsigned long val, val_round; ret = kstrtoul(buf, 0, &val); if (ret < 0) return ret; - tunables->timer_rate = val; + + val_round = jiffies_to_usecs(usecs_to_jiffies(val)); + if (val != val_round) + pr_warn("timer_rate not aligned to jiffy. Rounded up to %lu\n", + val_round); + + tunables->timer_rate = val_round; return count; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
