linux-kernel - Re: current->sched_class->yield

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Message-ID: <20140409182553.GE10526@twins.programming.kicks-ass.net>
Date:	Wed, 9 Apr 2014 20:25:53 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Lin Ming <minggr@...il.com>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: current->sched_class->yield_task is NULL, any hint?

On Wed, Apr 09, 2014 at 10:43:32AM -0700, Lin Ming wrote:
> Hi Peter,
> 
> I hit a panic in sys_sched_yield() because(for some unknown reason)
> current->sched_class->yield_task is NULL.
> It's an ARM embedded board with 3.4-rt kernel.
> 
> Could you share any hint for the possible causes?

What class does current->sched_class point to?
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