Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934938AbaFTPwT (ORCPT ); Fri, 20 Jun 2014 11:52:19 -0400 Received: from mail-qc0-f170.google.com ([209.85.216.170]:41482 "EHLO mail-qc0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933801AbaFTPwP (ORCPT ); Fri, 20 Jun 2014 11:52:15 -0400 Date: Fri, 20 Jun 2014 11:52:10 -0400 From: Tejun Heo To: Christoph Lameter Cc: "Paul E. McKenney" , David Howells , Linus Torvalds , Andrew Morton , Oleg Nesterov , linux-kernel@vger.kernel.org Subject: Re: [PATCH RFC] percpu: add data dependency barrier in percpu accessors and operations Message-ID: <20140620155210.GA21818@htj.dyndns.org> References: <20140612135630.GA23606@htj.dyndns.org> <20140617194017.GO4669@linux.vnet.ibm.com> <20140619204634.GB9814@mtj.dyndns.org> <20140619211543.GD9814@mtj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 20, 2014 at 10:23:57AM -0500, Christoph Lameter wrote: > > You're repeatedly getting wayside in the discussion. What are you > > suggesting? Sending IPIs on each percpu allocation? > > No this is about sending an IPI if you want to modify the percpu data of > another process. There was a mentionig of code that modifies the per cpu > data of another processor? Yes, the initialization of percpu areas on allocation. That was the *sole* subject of this thread. -- tejun -- 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/