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SubjectRe: linux-next: new scheduler messages span: 0-15 (max cpu_capacity = 589) when starting KVM guests
On Mon, Sep 19, 2016 at 03:19:11PM +0200, Christian Borntraeger wrote:
> Dietmar, Ingo, Tejun,
>
> since commit cd92bfd3b8cb0ec2ee825e55a3aee704cd55aea9
> sched/core: Store maximum per-CPU capacity in root domain
>
> I get tons of messages from the scheduler like
> [..]
> span: 0-15 (max cpu_capacity = 589)
> span: 0-15 (max cpu_capacity = 589)
> span: 0-15 (max cpu_capacity = 589)
> span: 0-15 (max cpu_capacity = 589)
> [..]
>

Oh, oops ;-)

Something like the below ought to cure I think.

---
kernel/sched/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f5f7b3cdf0be..fdc9e311fd29 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6990,7 +6990,7 @@ static int build_sched_domains(const struct cpumask *cpu_map,
}
rcu_read_unlock();

- if (rq) {
+ if (rq && sched_debug_enabled) {
pr_info("span: %*pbl (max cpu_capacity = %lu)\n",
cpumask_pr_args(cpu_map), rq->rd->max_cpu_capacity);
}
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