linux-kernel - Re: [PATCH v4 12/15] mm,hwpoison: Rework soft offline for in-use pages

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Message-ID: <20200723101942.GA19826@linux>
Date:   Thu, 23 Jul 2020 12:19:47 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     HORIGUCHI NAOYA(堀口　直也) 
        <naoya.horiguchi@....com>
Cc:     akpm@...ux-foundation.org, Michal Hocko <MHocko@...e.com>,
        linux-mm@...ck.org, mike.kravetz@...cle.com, david@...hat.com,
        aneesh.kumar@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        Oscar Salvador <OSalvador@...e.com>
Subject: Re: [PATCH v4 12/15] mm,hwpoison: Rework soft offline for in-use
 pages

On Wed, Jul 22, 2020 at 10:08:59AM +0200, osalvador@...e.de wrote:
> On 2020-07-20 10:27, osalvador@...e.de wrote:
> > > This means that some hugepages are dissolved, but the others not,
> > > maybe which is not desirable.
> > > I'll dig this more later but just let me share at first.
> > > 
> > > A few minor comment below ...
> > 
> > 
> > Uhm, weird.
> > 
> > I will be taking a look today.
> 
> After some digging up I __think__ I found the problem.
> I will try to fix it up and I will be running tests.

I found the problem.
I re-ran the tests again with small and large memory and 
the stats look correct this time.

After some more testing, I also fixed a list corruption that was happening
due to the same problem.

I am creating a git branch so you can re-run your tests on it as well.

-- 
Oscar Salvador
SUSE L3