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sched/numa: Don't scale the imbalance 

It's far too easy to get ridiculously large imbalance pct when you
scale it like that. Use a fixed 125% for now.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-zsriaft1dv7hhboyrpvqjy6s@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2012-05-11 00:26:27 +02:00 committed by Ingo Molnar
parent 04f733b4af
commit 870a0bb5d6
1 changed files with 1 additions and 6 deletions
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7
kernel/sched/core.c
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@ -6261,11 +6261,6 @@ static int *sched_domains_numa_distance;
static struct cpumask ***sched_domains_numa_masks;
static int sched_domains_curr_level;
static inline unsigned long numa_scale(unsigned long x, int level)
{
return x * sched_domains_numa_distance[level] / sched_domains_numa_scale;
}
static inline int sd_local_flags(int level)
{
if (sched_domains_numa_distance[level] > REMOTE_DISTANCE)
@ -6286,7 +6281,7 @@ sd_numa_init(struct sched_domain_topology_level *tl, int cpu)
.min_interval = sd_weight,
.max_interval = 2*sd_weight,
.busy_factor = 32,
.imbalance_pct = 100 + numa_scale(25, level),
.imbalance_pct = 125,
.cache_nice_tries = 2,
.busy_idx = 3,
.idle_idx = 2,