summaryrefslogtreecommitdiffstats
path: root/kernel/sched
diff options
context:
space:
mode:
authorDiwakar Tundlam <dtundlam@nvidia.com>2012-03-07 14:44:26 -0800
committerIngo Molnar <mingo@elte.hu>2012-03-12 20:43:16 +0100
commit554cecaf733623b327eef9652b65965eb1081b81 (patch)
tree4e471c4689563d3a882667323ece2e581d8f17c8 /kernel/sched
parent5fbd036b552f633abb394a319f7c62a5c86a9cd7 (diff)
downloadop-kernel-dev-554cecaf733623b327eef9652b65965eb1081b81.zip
op-kernel-dev-554cecaf733623b327eef9652b65965eb1081b81.tar.gz
sched/nohz: Correctly initialize 'next_balance' in 'nohz' idle balancer
The 'next_balance' field of 'nohz' idle balancer must be initialized to jiffies. Since jiffies is initialized to negative 300 seconds the 'nohz' idle balancer does not run for the first 300s (5mins) after bootup. If no new processes are spawed or no idle cycles happen, the load on the cpus will remain unbalanced for that duration. Signed-off-by: Diwakar Tundlam <dtundlam@nvidia.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1DD7BFEDD3147247B1355BEFEFE4665237994F30EF@HQMAIL04.nvidia.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/fair.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index def17aa..11f3979 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5571,6 +5571,7 @@ __init void init_sched_fair_class(void)
open_softirq(SCHED_SOFTIRQ, run_rebalance_domains);
#ifdef CONFIG_NO_HZ
+ nohz.next_balance = jiffies;
zalloc_cpumask_var(&nohz.idle_cpus_mask, GFP_NOWAIT);
cpu_notifier(sched_ilb_notifier, 0);
#endif
OpenPOWER on IntegriCloud