From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51]) by kanga.kvack.org (Postfix) with ESMTP id 378226B0034 for ; Wed, 25 Sep 2013 11:35:50 -0400 (EDT) Received: by mail-pa0-f51.google.com with SMTP id kp14so5343347pab.24 for ; Wed, 25 Sep 2013 08:35:49 -0700 (PDT) Date: Wed, 25 Sep 2013 17:35:33 +0200 From: Peter Zijlstra Subject: Re: [PATCH] hotplug: Optimize {get,put}_online_cpus() Message-ID: <20130925153533.GN3081@twins.programming.kicks-ass.net> References: <20130919143241.GB26785@twins.programming.kicks-ass.net> <20130923175052.GA20991@redhat.com> <20130924123821.GT12926@twins.programming.kicks-ass.net> <20130924160359.GA2739@redhat.com> <20130924124341.64d57912@gandalf.local.home> <20130924170631.GB5059@redhat.com> <20130924174717.GH9093@linux.vnet.ibm.com> <20130924180005.GA7148@redhat.com> <20130924203512.GS9326@twins.programming.kicks-ass.net> <20130925151642.GA13244@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130925151642.GA13244@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Oleg Nesterov Cc: "Paul E. McKenney" , Steven Rostedt , Mel Gorman , Rik van Riel , Srikar Dronamraju , Ingo Molnar , Andrea Arcangeli , Johannes Weiner , Linux-MM , LKML , Thomas Gleixner On Wed, Sep 25, 2013 at 05:16:42PM +0200, Oleg Nesterov wrote: > Yes, but my point was, this can only happen in recursive fast path. Right, I understood. > And in this case (I think) we do not care, we are already in the critical > section. I tend to agree, however paranoia.. > OK, please forget. I guess I will never understand this ;) It might just be I'm less certain about there not being any avenue of mischief. -- 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