* Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> > reasons. As it turns out, a printk() bodge showed that
> > nr_cpus_allowed == 80 set in sched_init_smp() while
> > num_online_cpus() == 48. This effectively disabling
> > numacore. If you had responded to the bug report, this would
> > likely have been found last Wednesday.
>
> Does changing it from num_online_cpus() to num_possible_cpus()
> help? (Can send a patch if you want.)
I.e. something like the patch below.
Thanks,
Ingo
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 503ec29..9d11a8a 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2646,7 +2646,7 @@ static bool task_numa_candidate(struct task_struct *p)
/* Don't disturb hard-bound tasks: */
if (sched_feat(NUMA_EXCLUDE_AFFINE)) {
- if (p->nr_cpus_allowed != num_online_cpus())
+ if (p->nr_cpus_allowed != num_possible_cpus())
return false;
}
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>