On Wed 14-11-12 03:03:02, David Rientjes wrote: > On Wed, 14 Nov 2012, Michal Hocko wrote: > > > > With hotpluggable and memoryless nodes, it's possible that node 0 will > > > not be online, so use the first online node's zonelist rather than > > > hardcoding node 0 to pass a zonelist with all zones to the oom killer. > > > > Makes sense although I haven't seen a machine with no 0 node yet. > > We routinely do testing with them, actually, just by physically removing > all memory described by the SRAT that maps to node 0. You could do the > same thing by making all pxms that map to node 0 to be hotpluggable in > your memory affinity structure. I've been bit by it one too many times so > I always keep in mind that no single node id is guaranteed to be online > (although at least one node is always online); hence, first_online_node is > the solution. I thought that a boot cpu would be bound to a node0 or something similar. Thanks for the clarification! > > According to 13808910 this is indeed possible. > > > > > Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> > > > Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx> > > > > Reviewed-by: Michal Hocko <mhocko@xxxxxxx> > > > > Thanks! -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>