From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yasunori Goto Date: Fri, 14 May 2004 00:13:15 +0000 Subject: Re: [Lhns-devel] Re: Who's doing what with cpu/memory/node hotplug? Message-Id: <20040513150842.22F5.YGOTO@us.fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org Hello. > > Iam not sure what specifically you are looking for ... > > I was looking for the short and sweet overview such as you just > presented ;). Thanks. > > I need to start following this hotplug work because it is next door to > the cpu/memory placement work that I am most focused on, such as > cpusets, led by Simon Derr of Bull, sitting on top of sched_setaffinity > and Andi Kleen's numa work. A cpuset is a set of cpu and memory > resources that several tasks share, perhaps exclusively (all other > tasks kept out). > > At some point, questions such as "what happens when a node is unplugged > from a cpuset" will need to be answered. And even earlier, "what happens > when a cpu is unplugged that was in a tasks cpus_allowed, or a memory > node unplugged, that was in a vma's list of allowed memory zones." > > Or perhaps the answers to these questions are already known ?? At least, there aren't enough answer about memory hotplug yet if there is a process that is using memory affinity. But did you see Iwamoto-san's patch ? This is infrastructure that contents of memory can migrate from a node to other node. If remap_onepage() of his patch execute on same cpus of that process or 'node id' is specified, it will migrate to appriciate node. I think it can be your help. But, probably you might think many other works are necessary, right? Thanks. -- Yasunori Goto ------------------------------------------------------- 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