Re: [External] Re: vmscan: Reclaim unevictable pages

From: Pankaj Suryawanshi
Date: Tue Mar 26 2019 - 05:16:17 EST

From: Michal Hocko <mhocko@xxxxxxxxxx>
Sent: 26 March 2019 14:31
To: Pankaj Suryawanshi
Cc: Kirill Tkhai; Vlastimil Babka; aneesh.kumar@xxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; minchan@xxxxxxxxxx; linux-mm@xxxxxxxxx; khandual@xxxxxxxxxxxxxxxxxx
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 account 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
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