Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754509AbbDJTvu (ORCPT ); Fri, 10 Apr 2015 15:51:50 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:34081 "EHLO e9.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754194AbbDJTvt (ORCPT ); Fri, 10 Apr 2015 15:51:49 -0400 Date: Fri, 10 Apr 2015 12:50:46 -0700 From: Nishanth Aravamudan To: Peter Zijlstra Cc: Ingo Molnar , linux-kernel@vger.kernel.org, Srikar Dronamraju , Boqun Feng , Anshuman Khandual , linuxppc-dev@lists.ozlabs.org, Benjamin Herrenschmidt , Anton Blanchard Subject: Re: Topology updates and NUMA-level sched domains Message-ID: <20150410195046.GB31621@linux.vnet.ibm.com> References: <20150406214558.GA38501@linux.vnet.ibm.com> <20150407102147.GJ23123@twins.programming.kicks-ass.net> <20150407171410.GA62529@linux.vnet.ibm.com> <20150407194129.GT23123@twins.programming.kicks-ass.net> <20150409222956.GE53918@linux.vnet.ibm.com> <20150410083153.GQ27490@worktop.programming.kicks-ass.net> <20150410090810.GW24151@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150410090810.GW24151@twins.programming.kicks-ass.net> X-Operating-System: Linux 3.13.0-40-generic (x86_64) User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15041019-0033-0000-0000-0000023F2BF6 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 875 Lines: 21 On 10.04.2015 [11:08:10 +0200], Peter Zijlstra wrote: > On Fri, Apr 10, 2015 at 10:31:53AM +0200, Peter Zijlstra wrote: > > Please, step back, look at what you're doing and ask yourself, will any > > sane person want to use this? Can they use this? > > > > If so, start by describing the desired user semantics of this work. > > Don't start by cobbling kernel bits togerther until it stops crashing. > > Also, please talk to your s390 folks. They've long since realized that > this doesn't work. They've just added big honking caches (their BOOK > stuff) and pretend the system is UMA. Interesting, I will take a look. -Nish -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/