Messages in this thread | | | Date | Sun, 11 Jun 2017 09:45:35 +0800 | From | Wei Yang <> | Subject | Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable nodes |
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On Thu, Jun 08, 2017 at 02:23:18PM +0200, Michal Hocko wrote: >From: Michal Hocko <mhocko@suse.com> > >movable_node kernel parameter allows to make hotplugable NUMA >nodes to put all the hotplugable memory into movable zone which >allows more or less reliable memory hotremove. At least this >is the case for the NUMA nodes present during the boot (see >find_zone_movable_pfns_for_nodes). > >This is not the case for the memory hotplug, though. > > echo online > /sys/devices/system/memory/memoryXYZ/status > >will default to a kernel zone (usually ZONE_NORMAL) unless the >particular memblock is already in the movable zone range which is not >the case normally when onlining the memory from the udev rule context >for a freshly hotadded NUMA node. The only option currently is to have a >special udev rule to echo online_movable to all memblocks belonging to >such a node which is rather clumsy. Not the mention this is inconsistent >as well because what ended up in the movable zone during the boot will >end up in a kernel zone after hotremove & hotadd without special care. >
A kernel zone here means? Which is the counterpart in zone_type? or a combination of several zone_type?
-- Wei Yang Help you, Help me [unhandled content-type:application/pgp-signature] | |