From: Anton Blanchard <anton@samba.org>
The per cpu schedule counters need to be summed up over all possible cpus.
When testing hotplug cpu remove I saw the sum of the online cpu count for
nr_uninterruptible go negative which made the load average go nuts.
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/kernel/sched.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff -puN kernel/sched.c~sched-use-for_each_cpu kernel/sched.c
--- 25/kernel/sched.c~sched-use-for_each_cpu 2004-08-01 23:09:03.780865680 -0700
+++ 25-akpm/kernel/sched.c 2004-08-01 23:09:03.792863856 -0700
@@ -924,7 +924,7 @@ unsigned long nr_uninterruptible(void)
{
unsigned long i, sum = 0;
- for_each_online_cpu(i)
+ for_each_cpu(i)
sum += cpu_rq(i)->nr_uninterruptible;
return sum;
@@ -934,7 +934,7 @@ unsigned long long nr_context_switches(v
{
unsigned long long i, sum = 0;
- for_each_online_cpu(i)
+ for_each_cpu(i)
sum += cpu_rq(i)->nr_switches;
return sum;
@@ -944,7 +944,7 @@ unsigned long nr_iowait(void)
{
unsigned long i, sum = 0;
- for_each_online_cpu(i)
+ for_each_cpu(i)
sum += atomic_read(&cpu_rq(i)->nr_iowait);
return sum;
_