From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Andrzej Siewior Subject: Re: [PATCH RT 4/6] rt/locking: Reenable migration accross schedule Date: Tue, 19 Apr 2016 09:07:05 +0200 Message-ID: <5715D919.2030500@linutronix.de> References: <1459405903.14336.64.camel@gmail.com> <20160401211105.GE29603@linutronix.de> <1459566735.3779.36.camel@gmail.com> <57068F28.8010409@linutronix.de> <1460123044.16946.11.camel@gmail.com> <5707B911.6090404@linutronix.de> <1460125010.16946.27.camel@gmail.com> <5707C563.2050801@linutronix.de> <1460134168.3860.6.camel@gmail.com> <20160418171550.GA21734@linutronix.de> <1461002132.3895.59.camel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: Thomas Gleixner , linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org, Steven Rostedt , Peter Zijlstra To: Mike Galbraith Return-path: Received: from www.linutronix.de ([62.245.132.108]:37329 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751930AbcDSHHN (ORCPT ); Tue, 19 Apr 2016 03:07:13 -0400 In-Reply-To: <1461002132.3895.59.camel@gmail.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 04/18/2016 07:55 PM, Mike Galbraith wrote: > > I'll have to feed it to DL980, hotplug and jitter test it. It seemed > to think that pinning post acquisition was a bad idea jitter wise, but > I was bending things up while juggling multiple boxen, so.. pinning pre acquisition could get you in a situation where you get the lock and you are stuck on CPU A where is also a task running right now with a higher priority while CPU B and CPU C are idle. > > -Mike > Sebastian