linux-kernel - Re: 32GB SSD on USB1.1 P3/700 == ___HELL__

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Date:	Wed, 7 Apr 2010 16:52:30 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	Andreas Mohr <andi@...as.de>, Jens Axboe <axboe@...nel.dk>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: 32GB SSD on USB1.1 P3/700 == ___HELL___ (2.6.34-rc3)

> >> active_anon:34886 inactive_anon:41460 isolated_anon:1
> >>  active_file:13576 inactive_file:27884 isolated_file:65
> >>  unevictable:0 dirty:4788 writeback:5675 unstable:0
> >>  free:1198 slab_reclaimable:1952 slab_unreclaimable:2594
> >>  mapped:10152 shmem:56 pagetables:742 bounce:0
> >> DMA free:2052kB min:84kB low:104kB high:124kB active_anon:940kB inactive_anon:3876kB active_file:212kB inactive_file:8224kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15804kB mlocked:0kB dirty:3448kB writeback:752kB mapped:80kB shmem:0kB slab_reclaimable:160kB slab_unreclaimable:124kB kernel_stack:40kB pagetables:48kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:20096 all_unreclaimable? yes
> >> lowmem_reserve[]: 0 492 492
> >> Normal free:2740kB min:2792kB low:3488kB high:4188kB active_anon:138604kB inactive_anon:161964kB active_file:54092kB inactive_file:103312kB unevictable:0kB isolated(anon):4kB isolated(file):260kB present:503848kB mlocked:0kB dirty:15704kB writeback:21948kB mapped:40528kB shmem:224kB slab_reclaimable:7648kB slab_unreclaimable:10252kB kernel_stack:1632kB pagetables:2920kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:73056 all_unreclaimable? no
> >> lowmem_reserve[]: 0 0 0
> >> DMA: 513*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2052kB
> >> Normal: 685*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2740kB
> >> 56122 total pagecache pages
> >> 14542 pages in swap cache
> >> Swap cache stats: add 36404, delete 21862, find 8669/10118
> >> Free swap  = 671696kB
> >> Total swap = 755048kB
> >> 131034 pages RAM
> >> 3214 pages reserved
> >> 94233 pages shared
> >> 80751 pages non-shared
> >> Out of memory: kill process 3462 (kdeinit4) score 95144 or a child
> >
> > shmem=56 is ignorable, and
> > active_file+inactive_file=13576+27884=41460 < 56122 total pagecache pages.
> >
> > Where are the 14606 file pages gone?
> 
> swapcache?

Ah exactly!

Thanks,
Fengguang
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