linux-kernel - Re: Memory hotplug failed to offline on bare metal system of multiple nodes

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Message-ID: <20181101095834.GD23921@dhcp22.suse.cz>
Date:   Thu, 1 Nov 2018 10:58:34 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Baoquan He <bhe@...hat.com>
Cc:     akpm@...ux-foundation.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: Memory hotplug failed to offline on bare metal system of
 multiple nodes

On Thu 01-11-18 17:42:43, Baoquan He wrote:
> On 11/01/18 at 10:22am, Michal Hocko wrote:
> > > I haven't figured out why the above commit caused those memmory
> > > block in MOVABL zone being not removable. Still checking. Attach the
> > > tested reverting patch in this mail.
> > 
> > Could you check which of the test inside has_unmovable_pages claimed the
> > failure? Going back to marking movable_zone as guaranteed to offline is
> > just too fragile.
> 
> Sure, will add debugging code and check. Will update if anything found.

Please dump the whole struct page state for the failing pfn.
-- 
Michal Hocko
SUSE Labs