On Thu 01-06-17 10:19:36, Reza Arbab wrote: > On Thu, Jun 01, 2017 at 04:22:28PM +0200, Michal Hocko wrote: > >On Thu 01-06-17 16:11:55, Vlastimil Babka wrote: > >>Simple should work, hopefully. > >>- if memory is hotplugged, it's obviously hotplugable, so we don't have > >>to rely on BIOS description. > > > >Not sure I understand. We do not have any information about the hotplug > >status at the time we do online. > > The x86 SRAT (or the dt, on other platforms) can describe memory as > hotpluggable. See memblock_mark_hotplug(). That's only for memory present at > boot, though. Yes but lose that information after the memblock is gone and numa fully initialized. Or can we reconstruct that somehow? > He's saying that since the memory was added after boot, it is by definition > hotpluggable. There's no need to check for that marking/description. Yes, but we do not know whether we are onlining memblocks from a boot time numa node or a fresh one which has been hotadded. -- 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>
