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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

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Thread

[PATCH] mm, memory_hotplug: support movable_node for hotplugable nodes Michal Hocko <mhocko@kernel.org> - 2017-06-08 14:30 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-10 16:40 +0200
    Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-12 08:40 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-11 03:50 +0200
    Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-12 08:40 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-12 06:30 +0200
    Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-12 08:50 +0200
      Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Vlastimil Babka <vbabka@suse.cz> - 2017-06-14 11:10 +0200
        Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-15 03:10 +0200
      Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-14 11:10 +0200
      Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-15 05:20 +0200
        Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-15 10:20 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Vlastimil Babka <vbabka@suse.cz> - 2017-06-12 11:00 +0200
  [PATCH -v2] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-12 13:20 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Wei Yang <richard.weiyang@gmail.com> - 2017-06-15 05:40 +0200
    Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Michal Hocko <mhocko@kernel.org> - 2017-06-15 10:30 +0200
  Re: [PATCH] mm, memory_hotplug: support movable_node for hotplugable  nodes Reza Arbab <arbab@linux.vnet.ibm.com> - 2017-06-15 17:50 +0200

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