From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx200.postini.com [74.125.245.200]) by kanga.kvack.org (Postfix) with SMTP id 69C8A6B004D for ; Mon, 12 Aug 2013 17:13:10 -0400 (EDT) Message-ID: <1376341985.32100.174.camel@pasglop> Subject: Re: [PATCH 2/2] Register bootmem pages at boot on powerpc From: Benjamin Herrenschmidt Date: Tue, 13 Aug 2013 07:13:05 +1000 In-Reply-To: <5208DCBC.7060205@linux.vnet.ibm.com> References: <52050ACE.4090001@linux.vnet.ibm.com> <52050B80.8010602@linux.vnet.ibm.com> <1376266763.32100.144.camel@pasglop> <5208DCBC.7060205@linux.vnet.ibm.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Nathan Fontenot Cc: linuxppc-dev@lists.ozlabs.org, linux-mm On Mon, 2013-08-12 at 08:01 -0500, Nathan Fontenot wrote: > > Can you tell me a bit more, the above makes me nervous... > > Ok, I agree. that message isn't quite right. > > What I wanted to convey is that memory hotplug is not fully supported > on powerpc with SPARSE_VMEMMAP enabled.. Perhaps the message should read > "Memory hotplug is not fully supported for bootmem info nodes". > > Thoughts? Since SPARSE_VMEMMAP is our default and enabled in our distros, that mean that memory hotplug isn't fully supported for us in general ? What do you mean by "not fully supported" ? What precisely is missing ? What will happen if one tries to plug or unplug memory? Shouldn't we fix it ? Cheers, Ben. -- 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