From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Altenberg <jan.altenberg@linutronix.de>
Subject: Re: BUG: at kernel/sched.c:4031 __schedule()
Date: Thu, 07 Jun 2007 17:58:30 +0200
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Cc: Oleg Kechin <okechin@gmail.com>, linux-rt-users@vger.kernel.org,
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To: Steven Rostedt <rostedt@goodmis.org>
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Hi,

> > in prepare_task_switch(rq, next); interrupts are enabled,
> 
> That's a bug.  __schedule should not have interrupts enabled.
> What's the back trace of this?

I've also seen this in the past. Interrupts are enabled in
prepare_lock_switch because ARM defines __ARCH_WANT_INTERRUPTS_ON_CTXSW.

IIRC Thomas fixed this for the current -rt release.

Cheers,
	Jan