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Message-ID: <17de8d65-592f-72be-0891-6eaaedfd26f2@redhat.com>
Date: Fri, 30 Aug 2019 09:07:59 +0200
From: David Hildenbrand <david@...hat.com>
To: Michal Hocko <mhocko@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
Andrew Morton <akpm@...ux-foundation.org>,
Oscar Salvador <osalvador@...e.de>,
Pavel Tatashin <pasha.tatashin@...een.com>,
Dan Williams <dan.j.williams@...el.com>,
Wei Yang <richardw.yang@...ux.intel.com>
Subject: Re: [PATCH v2 3/6] mm/memory_hotplug: Process all zones when removing
memory
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
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