From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russ Anderson Date: Fri, 14 May 2004 13:49:07 +0000 Subject: Re: Who's doing what with cpu/memory/node hotplug? Message-Id: <200405141349.i4EDn7p1053131@ben.americas.sgi.com> List-Id: References: <20040512205107.16bb82a6.pj@sgi.com> In-Reply-To: <20040512205107.16bb82a6.pj@sgi.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Keiichiro Tokunaga wrote: > Dave Hansen wrote: > > On Wed, 2004-05-12 at 23:35, Keiichiro Tokunaga wrote: > > > > > > I'm rather focusing on ACPI based container device hotplug. > > > A scope of LHNS includes a container device that contains > > > IO devices. I think such a devices couldn't be handled by NUMA > > > hotplug. > > > > Why not? We already export the information about which PCI busses are > > attached to which NUMA nodes. How are I/O devices different from CPU or > > memory? > > I have just one concern. > How about a container device that contains IO devices only? > - Does it count as a NUMA node? > - Is it having a NUMA node ID? Yes, it would count as NUMA node with a NUMA ID. So a NUMA node could have CPUs, memory, and I/O, where each of those may or may not be present. There could be a node without any CPU, memory, or I/O. An example would be an I/O only node with PCI devices that are hot plug. The PCI devices may or may not be connected at any point in time. And Yes, SGI does have I/O only nodes (and memory only nodes). Thanks, -- Russ Anderson, OS RAS/Partitioning Project Lead SGI - Silicon Graphics Inc rja@sgi.com ------------------------------------------------------- This SF.Net email is sponsored by: SourceForge.net Broadband Sign-up now for SourceForge Broadband and get the fastest 6.0/768 connection for only $19.95/mo for the first 3 months! http://ads.osdn.com/?ad_id%62&alloc_ida84&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel