Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c

[Bruno Wolff III]

On Thu, Jul 17, 2014 at 14:35:02 +0200,
 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> In any case, can someone who can trigger this run with the below; its
> 'clean' for me, but supposedly you'll trigger a FAIL somewhere.

I got a couple of fail messages.

dmesg output is available in the bug as the following attachment:
https://bugzilla.kernel.org/attachment.cgi?id=143361

The part of interest is probably:

[    0.253354] build_sched_groups: got group f255b020 with cpus: 
[    0.253436] build_sched_groups: got group f255b120 with cpus: 
[    0.253519] build_sched_groups: got group f255b1a0 with cpus: 
[    0.253600] build_sched_groups: got group f255b2a0 with cpus: 
[    0.253681] build_sched_groups: got group f255b2e0 with cpus: 
[    0.253762] build_sched_groups: got group f255b320 with cpus: 
[    0.253843] build_sched_groups: got group f255b360 with cpus: 
[    0.254004] build_sched_groups: got group f255b0e0 with cpus: 
[    0.254087] build_sched_groups: got group f255b160 with cpus: 
[    0.254170] build_sched_groups: got group f255b1e0 with cpus: 
[    0.254252] build_sched_groups: FAIL
[    0.254331] build_sched_groups: got group f255b1a0 with cpus: 0
[    0.255004] build_sched_groups: FAIL
[    0.255084] build_sched_groups: got group f255b1e0 with cpus: 1

I also booted with early printk=keepsched_debug as requested by 
Dietmar.
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