From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030318AbcIVVoE (ORCPT ); Thu, 22 Sep 2016 17:44:04 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:39490 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965056AbcIVVoD (ORCPT ); Thu, 22 Sep 2016 17:44:03 -0400 Date: Thu, 22 Sep 2016 23:41:30 +0200 (CEST) From: Thomas Gleixner To: Davidlohr Bueso cc: Waiman Long , Peter Zijlstra , Mike Galbraith , Ingo Molnar , Jonathan Corbet , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, Jason Low , Scott J Norton , Douglas Hatch Subject: Re: [RFC PATCH v2 3/5] futex: Throughput-optimized (TO) futexes In-Reply-To: <20160922213921.GA30291@linux-80c1.suse> Message-ID: References: <1474378963-15496-4-git-send-email-Waiman.Long@hpe.com> <1474441172.27308.19.camel@gmail.com> <57E319BE.2050208@hpe.com> <20160922074932.GV5008@twins.programming.kicks-ass.net> <20160922144123.GB13358@linux-80c1.suse> <20160922151144.GC13358@linux-80c1.suse> <57E43A46.9080601@hpe.com> <57E43EF9.8000400@hpe.com> <20160922213921.GA30291@linux-80c1.suse> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 22 Sep 2016, Davidlohr Bueso wrote: > On Thu, 22 Sep 2016, Waiman Long wrote: > > > BTW, my initial attempt for the new futex was to use the same workflow as > > the PI futexes, but use mutex which has optimistic spinning instead of > > rt_mutex. > > Btw, Thomas, do you still have any interest pursuing this for rtmutexes from > -rt into mainline? If so I can resend the patches from a while ago. Certainly yes. My faint memory tells me that there was some potential issue due to boosting the owner only if it gets scheduled out, but I might be wrong. Thanks, tglx