From: Xishi Qiu <qiuxishi@huawei.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Aaron Lu <aaron.lu@intel.com>
Subject: Re: why the count nr_file_pages is not equal to nr_inactive_file + nr_active_file ?
Date: Mon, 16 May 2016 17:58:19 +0800 [thread overview]
Message-ID: <573999BB.5090005@huawei.com> (raw)
In-Reply-To: <20160516093146.GA23251@dhcp22.suse.cz>
On 2016/5/16 17:31, Michal Hocko wrote:
> 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).
Hi Michal,
But the shmem seems very small.
nr_inactive_file 432444
nr_active_file 20659
nr_unevictable 2363
nr_shmem 128
nr_file_pages 462723
There is still 7129 pages difference.
root@hi3650:/ # cat /proc/vmstat
nr_free_pages 54192
nr_inactive_anon 39830
nr_active_anon 28794
nr_inactive_file 432444
nr_active_file 20659
nr_unevictable 2363
nr_mlock 0
nr_anon_pages 65249
nr_mapped 19742
nr_file_pages 462723
nr_dirty 20
nr_writeback 0
nr_slab_reclaimable 259333
nr_slab_unreclaimable 33463
nr_page_table_pages 3456
nr_kernel_stack 892
nr_unstable 0
nr_bounce 11
nr_vmscan_write 292032
nr_vmscan_immediate_reclaim 47204474
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 128
nr_dirtied 69574
nr_written 356299
nr_anon_transparent_hugepages 0
nr_free_cma 7519
nr_swapcache 41972
nr_dirty_threshold 6982
nr_dirty_background_threshold 99297
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WARNING: multiple messages have this Message-ID (diff)
From: Xishi Qiu <qiuxishi@huawei.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Linux MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
"Aaron Lu" <aaron.lu@intel.com>
Subject: Re: why the count nr_file_pages is not equal to nr_inactive_file + nr_active_file ?
Date: Mon, 16 May 2016 17:58:19 +0800 [thread overview]
Message-ID: <573999BB.5090005@huawei.com> (raw)
In-Reply-To: <20160516093146.GA23251@dhcp22.suse.cz>
On 2016/5/16 17:31, Michal Hocko wrote:
> 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).
Hi Michal,
But the shmem seems very small.
nr_inactive_file 432444
nr_active_file 20659
nr_unevictable 2363
nr_shmem 128
nr_file_pages 462723
There is still 7129 pages difference.
root@hi3650:/ # cat /proc/vmstat
nr_free_pages 54192
nr_inactive_anon 39830
nr_active_anon 28794
nr_inactive_file 432444
nr_active_file 20659
nr_unevictable 2363
nr_mlock 0
nr_anon_pages 65249
nr_mapped 19742
nr_file_pages 462723
nr_dirty 20
nr_writeback 0
nr_slab_reclaimable 259333
nr_slab_unreclaimable 33463
nr_page_table_pages 3456
nr_kernel_stack 892
nr_unstable 0
nr_bounce 11
nr_vmscan_write 292032
nr_vmscan_immediate_reclaim 47204474
nr_writeback_temp 0
nr_isolated_anon 0
nr_isolated_file 0
nr_shmem 128
nr_dirtied 69574
nr_written 356299
nr_anon_transparent_hugepages 0
nr_free_cma 7519
nr_swapcache 41972
nr_dirty_threshold 6982
nr_dirty_background_threshold 99297
next prev parent reply other threads:[~2016-05-16 9:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-13 3:58 why the count nr_file_pages is not equal to nr_inactive_file + nr_active_file ? Xishi Qiu
2016-05-13 3:58 ` Xishi Qiu
2016-05-13 7:00 ` Aaron Lu
2016-05-13 7:00 ` Aaron Lu
2016-05-13 7:31 ` Xishi Qiu
2016-05-13 7:31 ` Xishi Qiu
2016-05-16 9:57 ` Michal Hocko
2016-05-16 9:57 ` Michal Hocko
2016-05-16 10:01 ` Xishi Qiu
2016-05-16 10:01 ` Xishi Qiu
2016-05-16 11:16 ` Michal Hocko
2016-05-16 11:16 ` Michal Hocko
2016-05-16 9:31 ` Michal Hocko
2016-05-16 9:31 ` Michal Hocko
2016-05-16 9:58 ` Xishi Qiu [this message]
2016-05-16 9:58 ` Xishi Qiu
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