From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carlos O'Donell Subject: Re: I have 12GB of RAM but I can only use 1GB? Date: Thu, 20 Sep 2012 00:19:59 -0400 Message-ID: <505A996F.4040807@systemhalted.org> References: <2698994.p4ZeTnMdFO@donald.sf-tec.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Rolf Eike Beer , linux-parisc To: John David Anglin Return-path: In-Reply-To: List-ID: List-Id: linux-parisc.vger.kernel.org On 9/19/2012 7:26 PM, John David Anglin wrote: > On 19-Sep-12, at 2:06 AM, Rolf Eike Beer wrote: > >> IIRC you need CONFIG_DISCONTIGMEM. > > Enclosed is my latest kernel patch against 3.5.4. > > One of things it addresses is an issue with CONFIG_DISCONTIGMEM introduced in 3.4. > > Another new thing is a hack which tries to paper over a softirq problem. For some reason, > we sometimes run off the end of the vector pending list causing a panic. This is probably related > to the restart issues discussed by Al Viro as things were worse with Al's suggested change. Rolf, Thibaut (on Google+), thanks for pointing out that without CONFIG_DISCONTIGMEM we don't pickup the other ranges. I have a patch to make the kernel warnings messages clearer about this. Dave, Thanks for the patch! Cheers, Carlos.