Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752822AbbDGK4U (ORCPT ); Tue, 7 Apr 2015 06:56:20 -0400 Received: from casper.infradead.org ([85.118.1.10]:38531 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751162AbbDGK4S (ORCPT ); Tue, 7 Apr 2015 06:56:18 -0400 Date: Tue, 7 Apr 2015 12:56:07 +0200 From: Peter Zijlstra To: Mike Galbraith Cc: Steven Rostedt , Thavatchai Makphaibulchoke , linux-kernel@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de, linux-rt-users@vger.kernel.org, Sebastian Andrzej Siewior Subject: Re: [PATCH v2 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at kernel/locking/rtmutex.c:997! Message-ID: <20150407105607.GK21418@twins.programming.kicks-ass.net> References: <1424395866-81589-1-git-send-email-tmac@hp.com> <1428369962-74723-1-git-send-email-tmac@hp.com> <1428369962-74723-2-git-send-email-tmac@hp.com> <20150406215959.4e8ad37b@grimm.local.home> <1428383383.3152.5.camel@gmail.com> <20150407102912.GK23123@twins.programming.kicks-ass.net> <1428403756.3152.56.camel@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1428403756.3152.56.camel@gmail.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 786 Lines: 15 On Tue, Apr 07, 2015 at 12:49:16PM +0200, Mike Galbraith wrote: > If you have a spot where it'd be nice to do that despite it being > somewhat (koff).. discouraged shall we say, you have to do something > funky. Thomas had a patch to not raise sirq unconditionally for -rt > to let nohz_full work, but it needs a lock that's converted to an > rtmutex in -rt, and which doesn't want to be un-converted. Ergo, get > funky. I should probably back away slowly at this point.. but got a reference to a thread that explains the 'problem'? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/