diff options
author | Andrea Adami <andrea.adami@gmail.com> | 2010-09-29 01:46:19 +0200 |
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committer | Andrea Adami <andrea.adami@gmail.com> | 2010-09-29 01:51:43 +0200 |
commit | da451d4d552488e6ce6dad0a7fa4815a9c29459d (patch) | |
tree | 3de0c7690e001a75eb505c525a0369168f8c6bf0 /recipes/linux/linux-kexecboot-2.6.29/timer-suppression.patch | |
parent | ee4a70a8d3832f0c4bae3c002692136e9ff6587f (diff) | |
download | openembedded-da451d4d552488e6ce6dad0a7fa4815a9c29459d.tar.gz |
linux-kexecboot: move recipes in /linux
* some old version might hopefully be pruned
Diffstat (limited to 'recipes/linux/linux-kexecboot-2.6.29/timer-suppression.patch')
-rw-r--r-- | recipes/linux/linux-kexecboot-2.6.29/timer-suppression.patch | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/recipes/linux/linux-kexecboot-2.6.29/timer-suppression.patch b/recipes/linux/linux-kexecboot-2.6.29/timer-suppression.patch new file mode 100644 index 0000000000..04362c96e3 --- /dev/null +++ b/recipes/linux/linux-kexecboot-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; |