From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jack Steiner Date: Thu, 10 Nov 2005 00:23:30 +0000 Subject: Re: [RFC] 4-level page table directories. Message-Id: <20051110002330.GA9219@sgi.com> List-Id: References: <20051027041709.GA13193@attica.americas.sgi.com> In-Reply-To: <20051027041709.GA13193@attica.americas.sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org On Thu, Nov 10, 2005 at 01:03:44AM +0100, Gerald Pfeifer wrote: > On Wed, 9 Nov 2005, Luck, Tony wrote: > > But don't you already have that issue with persuading them to ship with > > CONFIG_NR_CPUS384? Surely there are a whole boatload of tuneables > > and patches needed to get this sized system up and running? 4-level > > pagetables are just one piece of the puzzle. > > Is it possible you are mixing up MAX_NUMALINK_NODES (the maximum > system size, i.e., the maximum number of nodes in a numalink domain) > with CONFIG_NR_CPUS (the maximum SSI size)? > > I'm pretty confident SGI has not proposed setting CONFIG_NR_CPUS384 > to any OSV. ;-) > > Gerald True, nothing this big is proposed for inclusion in SLES. The current max for NR_CPUS is 1024. MAX_NUMALINK_NODES is the number of nodes in all SSI clusters that are connected by NUMALINK. Single kernels are still restricted to 256 nodes & 1024 cpus. -- Thanks Jack Steiner (steiner@sgi.com) 651-683-5302 Principal Engineer SGI - Silicon Graphics, Inc.