diff options
| author | Marcin Juszkiewicz <hrw@koansoftware.com> | 2009-03-26 11:10:03 +0100 |
|---|---|---|
| committer | Marcin Juszkiewicz <hrw@koansoftware.com> | 2009-03-26 11:10:03 +0100 |
| commit | a7be854977d7ad7c8460fee76739db8154e83049 (patch) | |
| tree | 3696192bc8abcae8ce4e0121df2dd4e5246541df /recipes/linux/linux-omap-2.6.29/timer-suppression.patch | |
| parent | e2718269c5f56774705478545316a879f0be82c4 (diff) | |
| parent | 1b045e71ce7c3b7ed6c68ae1d60e974edbe38efc (diff) | |
Merge branch 'org.openembedded.dev' of git@git.openembedded.net:openembedded into org.openembedded.dev
Diffstat (limited to 'recipes/linux/linux-omap-2.6.29/timer-suppression.patch')
| -rw-r--r-- | recipes/linux/linux-omap-2.6.29/timer-suppression.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.29/timer-suppression.patch b/recipes/linux/linux-omap-2.6.29/timer-suppression.patch new file mode 100644 index 0000000000..04362c96e3 --- /dev/null +++ b/recipes/linux/linux-omap-2.6.29/timer-suppression.patch @@ -0,0 +1,43 @@ +diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c +index b854a89..26f5569 100644 +--- a/kernel/time/tick-sched.c ++++ b/kernel/time/tick-sched.c +@@ -253,6 +253,16 @@ void tick_nohz_stop_sched_tick(void) + + /* Schedule the tick, if we are at least one jiffie off */ + if ((long)delta_jiffies >= 1) { ++ /* ++ * calculate the expiry time for the next timer wheel ++ * timer ++ */ ++ expires = ktime_add_ns(last_update, tick_period.tv64 * ++ delta_jiffies); ++ ++ /* Skip reprogram of event if its not changed */ ++ if(ts->tick_stopped && ktime_equal(expires, dev->next_event)) ++ goto out2; + + if (delta_jiffies > 1) + cpu_set(cpu, nohz_cpu_mask); +@@ -304,12 +314,7 @@ void tick_nohz_stop_sched_tick(void) + goto out; + } + +- /* +- * calculate the expiry time for the next timer wheel +- * timer +- */ +- expires = ktime_add_ns(last_update, tick_period.tv64 * +- delta_jiffies); ++ /* Mark expiries */ + ts->idle_expires = expires; + + if (ts->nohz_mode == NOHZ_MODE_HIGHRES) { +@@ -328,6 +333,7 @@ void tick_nohz_stop_sched_tick(void) + tick_do_update_jiffies64(ktime_get()); + cpu_clear(cpu, nohz_cpu_mask); + } ++out2: + raise_softirq_irqoff(TIMER_SOFTIRQ); + out: + ts->next_jiffies = next_jiffies; |