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From:   Pankaj Suryawanshi <pankaj.suryawanshi@einfochips.com>
To:     Michal Hocko <mhocko@kernel.org>
CC:     Kirill Tkhai <ktkhai@virtuozzo.com>,
        Vlastimil Babka <vbabka@suse.cz>,
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Subject: Re: [External] Re: vmscan: Reclaim unevictable pages
Thread-Topic: [External] Re: vmscan: Reclaim unevictable pages
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Date:   Tue, 26 Mar 2019 09:16:11 +0000
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________________________________________
From: Michal Hocko <mhocko@kernel.org>
Sent: 26 March 2019 14:31
To: Pankaj Suryawanshi
Cc: Kirill Tkhai; Vlastimil Babka; aneesh.kumar@linux.ibm.com; linux-kernel=
@vger.kernel.org; minchan@kernel.org; linux-mm@kvack.org; khandual@linux.vn=
et.ibm.com
Subject: Re: [External] Re: vmscan: Reclaim unevictable pages

[You were asked to use a reasonable quoting several times. This is
really annoying because it turns the email thread into a complete mess]

[Already fix the email client, but dont know the reason for quoting Maybe a=
ccount issue.]

On Tue 26-03-19 07:53:14, Pankaj Suryawanshi wrote:
> Is there anyone who is familiar with this?  Please Comment.

Not really. You are observing an unexpected behavior of the page reclaim
which hasn't changed for quite some time. So I find more probable that
your non-vanilla kernel is doing something unexpected. It would help if
you could track down how does the unevictable page get down to the
reclaim path. I assume this is a CMA page or something like that but
those shouldn't get to the reclaim path AFIR.

As i said earlier, i am using vanilla kernel 4.14.65.
--
Michal Hocko
SUSE Labs
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