Re: [BUG] in sched fair on v3.13-rc1+ doing hotplug

[Steven Rostedt]

On Wed, 27 Nov 2013 14:22:43 +0100
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> On Wed, Nov 27, 2013 at 08:13:45AM -0500, Steven Rostedt wrote:
> >         atomic_inc(&sd->groups->sgp->nr_busy_cpus);  <<---- BUG
> > unlock:
> >         rcu_read_unlock();
> > }
> 
> tip/sched/urgent has this one:
> 
> ---
> commit 42eb088ed246a5a817bb45a8b32fe234cf1c0f8b
> Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Date:   Tue Nov 19 16:41:49 2013 +0100
> 
>     sched: Avoid NULL dereference on sd_busy

After applying this patch, the bug does go away.

Thanks!

-- Steve
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