linux-kernel - Re: [PATCH v2 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at kernel/locking/rtmutex.c:997!

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Message-ID: <alpine.DEB.2.11.1504081044130.3845@nanos>
Date:	Wed, 8 Apr 2015 10:50:37 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Thavatchai Makphaibulchoke <thavatchai.makpahibulchoke@...com>
cc:	Steven Rostedt <rostedt@...dmis.org>,
	Thavatchai Makphaibulchoke <tmac@...com>,
	linux-kernel@...r.kernel.org, mingo@...hat.com,
	linux-rt-users@...r.kernel.org, umgwanakikbuti@...il.com,
	Peter Zijlstra <peterz@...radead.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH v2 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at
 kernel/locking/rtmutex.c:997!

On Tue, 7 Apr 2015, Thavatchai Makphaibulchoke wrote:
> On 04/06/2015 07:59 PM, Steven Rostedt wrote:
> In this case we are not actually boosting the idle_task priority, which
> should be OK.  But the warning could be very overwhelming on some
> platforms. TO keep the warning, I decided not to boots priority.  Please
> let me know if you have any suggestion.

Don't even try to get this working. Taking the lock in idle/interrupt
context is just plain wrong.

The proper solution is to get rid of the locking requirement and that
needs some thought on the timer wheel code.

Thanks,

	tglx
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