From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oa0-f54.google.com (mail-oa0-f54.google.com [209.85.219.54]) by kanga.kvack.org (Postfix) with ESMTP id E89BC6B0031 for ; Mon, 23 Sep 2013 13:31:41 -0400 (EDT) Received: by mail-oa0-f54.google.com with SMTP id n5so842278oag.41 for ; Mon, 23 Sep 2013 10:31:41 -0700 (PDT) Date: Mon, 23 Sep 2013 19:30:14 +0200 From: Peter Zijlstra Subject: Re: [PATCH] hotplug: Optimize {get,put}_online_cpus() Message-ID: <20130923173014.GF9326@twins.programming.kicks-ass.net> References: <20130917162050.GK22421@suse.de> <20130917164505.GG12926@twins.programming.kicks-ass.net> <20130918154939.GZ26785@twins.programming.kicks-ass.net> <20130919143241.GB26785@twins.programming.kicks-ass.net> <20130923105017.030e0aef@gandalf.local.home> <20130923145446.GX9326@twins.programming.kicks-ass.net> <20130923111303.04b99db8@gandalf.local.home> <20130923155059.GO9093@linux.vnet.ibm.com> <20130923160130.GC9326@twins.programming.kicks-ass.net> <20130923170400.GA1390@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130923170400.GA1390@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: "Paul E. McKenney" Cc: Steven Rostedt , Mel Gorman , Rik van Riel , Srikar Dronamraju , Ingo Molnar , Andrea Arcangeli , Johannes Weiner , Linux-MM , LKML , Oleg Nesterov , Thomas Gleixner On Mon, Sep 23, 2013 at 10:04:00AM -0700, Paul E. McKenney wrote: > At some point I suspect that we will want some form of fairness, but in > the meantime, good point. I figured we could start a timer on hotplug to force quiesce the readers after about 10 minutes or so ;-) Should be a proper discouragement from (ab)using this hotplug stuff... Muwhahaha -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org