xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse Source 
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: Cure nr_iowait_cpu() users
  init: Fix comment
  init, sched: Fix race between init and kthreadd
This commit is contained in:
Linus Torvalds
2010-07-02 09:52:58 -07:00
parent 4b78c119f0 8c215bd389
commit 123f94f22e
5 changed files with 25 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/sched.c
View File

@@ -2873,9 +2873,9 @@ unsigned long nr_iowait(void)
return sum;
}
unsigned long nr_iowait_cpu(void)
unsigned long nr_iowait_cpu(int cpu)
{
struct rq *this = this_rq();
struct rq *this = cpu_rq(cpu);
return atomic_read(&this->nr_iowait);
}

16
kernel/time/tick-sched.c
View File

@@ -154,14 +154,14 @@ static void tick_nohz_update_jiffies(ktime_t now)
* Updates the per cpu time idle statistics counters
*/
static void
update_ts_time_stats(struct tick_sched *ts, ktime_t now, u64 *last_update_time)
update_ts_time_stats(int cpu, struct tick_sched *ts, ktime_t now, u64 *last_update_time)
{
ktime_t delta;
if (ts->idle_active) {
delta = ktime_sub(now, ts->idle_entrytime);
ts->idle_sleeptime = ktime_add(ts->idle_sleeptime, delta);
if (nr_iowait_cpu() > 0)
if (nr_iowait_cpu(cpu) > 0)
ts->iowait_sleeptime = ktime_add(ts->iowait_sleeptime, delta);
ts->idle_entrytime = now;
}
@@ -175,19 +175,19 @@ static void tick_nohz_stop_idle(int cpu, ktime_t now)
{
struct tick_sched *ts = &per_cpu(tick_cpu_sched, cpu);
update_ts_time_stats(ts, now, NULL);
update_ts_time_stats(cpu, ts, now, NULL);
ts->idle_active = 0;
sched_clock_idle_wakeup_event(0);
}
static ktime_t tick_nohz_start_idle(struct tick_sched *ts)
static ktime_t tick_nohz_start_idle(int cpu, struct tick_sched *ts)
{
ktime_t now;
now = ktime_get();
update_ts_time_stats(ts, now, NULL);
update_ts_time_stats(cpu, ts, now, NULL);
ts->idle_entrytime = now;
ts->idle_active = 1;
@@ -216,7 +216,7 @@ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time)
if (!tick_nohz_enabled)
return -1;
update_ts_time_stats(ts, ktime_get(), last_update_time);
update_ts_time_stats(cpu, ts, ktime_get(), last_update_time);
return ktime_to_us(ts->idle_sleeptime);
}
@@ -242,7 +242,7 @@ u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time)
if (!tick_nohz_enabled)
return -1;
update_ts_time_stats(ts, ktime_get(), last_update_time);
update_ts_time_stats(cpu, ts, ktime_get(), last_update_time);
return ktime_to_us(ts->iowait_sleeptime);
}
@@ -284,7 +284,7 @@ void tick_nohz_stop_sched_tick(int inidle)
*/
ts->inidle = 1;
now = tick_nohz_start_idle(ts);
now = tick_nohz_start_idle(cpu, ts);
/*
* If this cpu is offline and it is the one which updates