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

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Message-ID: <20190830060100.GP28313@dhcp22.suse.cz>
Date:   Fri, 30 Aug 2019 08:01:00 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     David Hildenbrand <david@...hat.com>
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 Thu 29-08-19 18:59:31, David Hildenbrand wrote:
> On 29.08.19 18:27, Michal Hocko wrote:
[...]
> > No rush, really... It seems this is quite unlikely event as most hotplug
> > usecases simply online memory before removing it later on.
> > 
> 
> I can trigger it reliably right now while working/testing virtio-mem, so
> I finally want to clean up this mess :) (has been on my list for a long
> time). I'll try to hunt for the right commit id's that broke it.

f1dd2cd13c4b ("mm, memory_hotplug: do not associate hotadded memory to
zones until online")

-- 
Michal Hocko
SUSE Labs