Groups > linux.kernel > #1220024

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

From	Sujit K M <sjt.kar@gmail.com>
Newsgroups	linux.kernel
Subject	Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO)
Date	2015-09-07 11:40 +0200
Message-ID	<q6146-1Dd-19@gated-at.bofh.it> (permalink)
References	<q5XjQ-4JR-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Mon, Sep 7, 2015 at 11:00 AM, Chinmay V S <cvs268@gmail.com> 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





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-- Sujit K M

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

RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Chinmay V S <cvs268@gmail.com> - 2015-09-07 07:40 +0200
  Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-09-07 08:20 +0200
    Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Chinmay V S <cvs268@gmail.com> - 2015-09-07 09:00 +0200
      Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Mike Galbraith <umgwanakikbuti@gmail.com> - 2015-09-07 09:20 +0200
      Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Sujit K M <sjt.kar@gmail.com> - 2015-09-07 11:40 +0200
  Re: RT Scheduler - BUG_ON (idx >= MAX_RT_PRIO) Sujit K M <sjt.kar@gmail.com> - 2015-09-07 11:40 +0200

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