Re: [PATCH v2 3/6] mm/memory_hotplug: Process all zones when removing memory

[David Hildenbrand]

On 30.08.19 08:47, Michal Hocko wrote:
> On Fri 30-08-19 08:20:32, David Hildenbrand wrote:
> [...]
>> Regarding shrink_zone_span(), I suspect it was introduced by
>>
>> d0dc12e86b31 ("mm/memory_hotplug: optimize memory hotplug")
> 
> zone shrinking code is much older - 815121d2b5cd5. But I do not think
> this is really needed for Fixes tag.
> 

Yes it's older, but since d0dc12e86b31 we could run into uninitialized
nids for added memory when trying to shrink the zone.

-- 

Thanks,

David / dhildenb