On Thu 01-06-17 10:47:46, Reza Arbab wrote: > On Thu, Jun 01, 2017 at 05:38:38PM +0200, Michal Hocko wrote: > >On Thu 01-06-17 10:19:36, Reza Arbab wrote: > >>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? > > I'm not sure you'd have to. At boot time, those markings are used to > determine the initial boundaries of ZONE_MOVABLE. So if you removed these > memblocks, then readded them, they would still be in ZONE_MOVABLE.
Yes but that already works like that. I am nore interested in the case when the node goes away and it is added again. echo online > ... would result in a non-movable memory and that is the inconsistency I tried to call out in the changelog -- Michal Hocko SUSE Labs
