From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: Kernel panic with PREEMPT_RT_FULL and UIO driver Date: Thu, 22 Dec 2011 13:58:21 +0100 (CET) Message-ID: References: <4EF1B984.4010102@x2e.de> <20111222103114.GE24496@pengutronix.de> Mime-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="8323328-64323086-1324558702=:3020" Cc: Lukas Erlinghagen , linux-rt-users@vger.kernel.org To: =?ISO-8859-15?Q?Uwe_Kleine-K=F6nig?= Return-path: Received: from www.linutronix.de ([62.245.132.108]:34637 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751900Ab1LVM6X (ORCPT ); Thu, 22 Dec 2011 07:58:23 -0500 In-Reply-To: <20111222103114.GE24496@pengutronix.de> Sender: linux-rt-users-owner@vger.kernel.org List-ID: This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --8323328-64323086-1324558702=:3020 Content-Type: TEXT/PLAIN; charset=iso-8859-1 Content-Transfer-Encoding: 8BIT On Thu, 22 Dec 2011, Uwe Kleine-König wrote: > On Wed, Dec 21, 2011 at 11:48:36AM +0100, Lukas Erlinghagen wrote: > > ------------[ cut here ]------------ > > kernel BUG at kernel/rtmutex.c:724! > That's a recursive spinlock. Try enabling CONFIG_PROVE_LOCKING. News at eleven. I already explained Lukas, _why_ this happens. So what the heck will CONFIG_PROVE_LOCKING provide as extra value? We all appreciate your helpfulness, but your signal to noise ratio is approaching zero. Thanks, tglx --8323328-64323086-1324558702=:3020--