From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [patch 1/3] ipc/sem: fix -rt livelock Date: Fri, 4 Oct 2013 12:44:50 +0200 Message-ID: <20131004104450.GB19953@linutronix.de> References: <1379051751.5455.112.camel@marge.simpson.net> <1379052760.5455.127.camel@marge.simpson.net> <5234D94D.8010608@colorfullife.com> <1379220340.5545.93.camel@marge.simpson.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: Manfred Spraul , linux-rt-users , Steven Rostedt , Thomas Gleixner , Peter Zijlstra To: Mike Galbraith Return-path: Received: from www.linutronix.de ([62.245.132.108]:52992 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754186Ab3JDKov (ORCPT ); Fri, 4 Oct 2013 06:44:51 -0400 Content-Disposition: inline In-Reply-To: <1379220340.5545.93.camel@marge.simpson.net> Sender: linux-rt-users-owner@vger.kernel.org List-ID: * Mike Galbraith | 2013-09-15 06:45:40 [+0200]: Hi, >On Sat, 2013-09-14 at 23:46 +0200, Manfred Spraul wrote: >> Could you check that? > >I think you're right. > >> Or alternatively: Is my proposed sem_lock() function -rt friendly? > >Some way of making spin_unlock_wait() _go away_ along with the livelock >would be better, but patches look good to me. I'll apply both and stare >at the sum, and ask boxen what they think.. they're better at spotting >locking troubles ;-) Do you post a new series of those three patches with the live lock Manfred mentioned fixed or should I look at this serie? >-Mike Sebastian