linux-kernel - Re: RCU?: Scheduling while atomic with 3.4.23-rt33

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Message-ID: <alpine.LFD.2.02.1302181214250.22263@ionos>
Date:	Mon, 18 Feb 2013 12:16:41 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Tim Sander <tim.sander@....com>
cc:	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: RCU?: Scheduling while atomic with 3.4.23-rt33

On Mon, 18 Feb 2013, Tim Sander wrote:
> Here is a transtribed backtrace for easier reading:
> c0010fac t dump_backtrace
> c022c188 T dump_stack
> c022c71c t __schedule_bug
> c022fb28 t __schedule
> c0230644 t rt_spin_lock_slowlock
> c0230ba8 T rt_spin_lock
> c003a9b8 T __wake_up
> c0052a44 t invoke_rcu_callbacks
> c0053764 T rcu_check_callbacks
> c0026060 T update_process_times

That's due to CONFIG_TINY_PREEMPT_RCU=y. That's a known issue, which
has been fixed in 3.6-rt.

Steven, could you backport that to 3.2/3.4 please ?

Thanks,

	tglx
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