Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1423721Ab3FUSvJ (ORCPT ); Fri, 21 Jun 2013 14:51:09 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:34090 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423590Ab3FUSvG (ORCPT ); Fri, 21 Jun 2013 14:51:06 -0400 Date: Fri, 21 Jun 2013 11:50:56 -0700 From: Greg KH To: Yinghai Lu Cc: "H. Peter Anvin" , Nathan Zimmer , Robin Holt , Mike Travis , Rob Landley , Thomas Gleixner , Ingo Molnar , Andrew Morton , the arch/x86 maintainers , linux-doc@vger.kernel.org, Linux Kernel Mailing List Subject: Re: [RFC 0/2] Delay initializing of large sections of memory Message-ID: <20130621185056.GA23473@kroah.com> References: <1371831934-156971-1-git-send-email-nzimmer@sgi.com> <20130621165142.GA32125@kroah.com> <51C48745.9030304@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1037 Lines: 25 On Fri, Jun 21, 2013 at 11:44:22AM -0700, Yinghai Lu wrote: > On Fri, Jun 21, 2013 at 10:03 AM, H. Peter Anvin wrote: > > On 06/21/2013 09:51 AM, Greg KH wrote: > > > > I suspect the cutoff for this should be a lot lower than 8 TB even, more > > like 128 GB or so. The only concern is to not set the cutoff so low > > that we can end up running out of memory or with suboptimal NUMA > > placement just because of this. > > I would suggest another way: > only boot the system with boot node (include cpu, ram and pci root buses). > then after boot, could add other nodes. What exactly do you mean by "after boot"? Often, the boot process of userspace needs those additional cpus and ram in order to initialize everything (like the pci devices) properly. thanks, greg k-h -- 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/