linux-kernel - Re: why the count nr_file_pages is not equal to nr_inactive_file + nr_active

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Message-ID: <20160516093146.GA23251@dhcp22.suse.cz>
Date:	Mon, 16 May 2016 11:31:46 +0200
From:	Michal Hocko <mhocko@...nel.org>
To:	Xishi Qiu <qiuxishi@...wei.com>
Cc:	Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: why the count nr_file_pages is not equal to nr_inactive_file +
 nr_active_file ?

On Fri 13-05-16 11:58:16, Xishi Qiu wrote:
> I find the count nr_file_pages is not equal to nr_inactive_file + nr_active_file.
> There are 8 cpus, 2 zones in my system.

Because they count shmem pages as well and those are living on the anon
lru list (see shmem_add_to_page_cache).
-- 
Michal Hocko
SUSE Labs