Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO)

Sujit K M <[email protected]> Mon, 7 Sep 2015 15:08:35 +0530

Newsgroups	org.kernel.vger.linux-smp,org.kernel.vger.linux-kernel
Message-ID	<CAOPOgtAJg_ZOUr+PepEgAS3_Qn4C__c1UNy93AHCpwQX=ztPgA@mail.gmail.com>

On Mon, Sep 7, 2015 at 11:00 AM, Chinmay V S <[email protected]> wrote:
> Hello everyone,
>
> TL;DR: In Linux RT scheduler, how can rt_nr_running be non-zero AND
> active-bitmap NOT have any valid bit set?
>
> Details:
> Recently i encountered the following BUG() within the realtime
> scheduler (sched_rt.c) on 3.1.10 kernel.
> [101640.492840] kernel BUG at kernel/sched_rt.c:1126!
>
> This turns out to be
> 1126         BUG_ON(idx >= MAX_RT_PRIO);

The reason for the stack trace is given below.
http://www.spinics.net/lists/newbies/msg08889.html





-- 
-- Sujit K M

blog(http://kmsujit.blogspot.com/)