Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753381AbbDGLBa (ORCPT ); Tue, 7 Apr 2015 07:01:30 -0400 Received: from mail-wi0-f173.google.com ([209.85.212.173]:37098 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752037AbbDGLB1 (ORCPT ); Tue, 7 Apr 2015 07:01:27 -0400 Message-ID: <1428404484.3152.58.camel@gmail.com> Subject: Re: [PATCH v2 1/2] rtmutex Real-Time Linux: Fixing kernel BUG at kernel/locking/rtmutex.c:997! From: Mike Galbraith To: Peter Zijlstra 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 Date: Tue, 07 Apr 2015 13:01:24 +0200 In-Reply-To: <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> <20150407105607.GK21418@twins.programming.kicks-ass.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.16.0 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 917 Lines: 22 On Tue, 2015-04-07 at 12:56 +0200, Peter Zijlstra wrote: > 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'? https://lkml.org/lkml/2015/4/6/434 -- 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/