On 26/10/16 02:55, Reza Arbab wrote: > On Tue, Oct 25, 2016 at 11:15:40PM +1100, Balbir Singh wrote: >> After the ack, I realized there were some more checks needed, IOW >> questions for you :) > > Hey! No takebacks! > I still believe we need your changes, I was wondering if we've tested it against normal memory nodes and checked if any memblock allocations end up there. Michael showed me some memblock allocations on node 1 of a two node machine with movable_node I'll double check at my end. See my question below > The short answer is that neither of these is a concern. > > Longer; if you use "movable_node", x86 can identify these nodes at boot. They call memblock_mark_hotplug() while parsing the SRAT. Then, when the zones are initialized, those markings are used to determine ZONE_MOVABLE. > > We have no analog of this SRAT information, so our movable nodes can only be created post boot, by hotplugging and explicitly onlining with online_movable. > Is this true for all of system memory as well or only for nodes hotplugged later? Balbir Singh. -- 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>