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Message-Id: <20090618095729.d2f27896.akpm@linux-foundation.org>
Date: Thu, 18 Jun 2009 09:57:29 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: David Howells <dhowells@...hat.com>
Cc: Wu Fengguang <fengguang.wu@...el.com>,
LKML <linux-kernel@...r.kernel.org>,
Christoph Lameter <cl@...ux-foundation.org>,
KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
"hannes@...xchg.org" <hannes@...xchg.org>,
"peterz@...radead.org" <peterz@...radead.org>,
"riel@...hat.com" <riel@...hat.com>,
"tytso@....edu" <tytso@....edu>,
"linux-mm@...ck.org" <linux-mm@...ck.org>,
"elladan@...imo.com" <elladan@...imo.com>,
"npiggin@...e.de" <npiggin@...e.de>,
"minchan.kim@...il.com" <minchan.kim@...il.com>
Subject: Re: [PATCH 0/3] make mapped executable pages the first class
citizen
On Thu, 18 Jun 2009 17:18:58 +0100 David Howells <dhowells@...hat.com> wrote:
>
> Okay, after dropping all my devel patches, I got the OOM to happen again;
> fresh trace attached. I was running LTP and an NFSD, and I was spamming the
> NFSD continuously from another machine (mount;tar;umount;repeat).
>
>
> ...
>
> Mem-Info:
> DMA per-cpu:
> CPU 0: hi: 0, btch: 1 usd: 0
> CPU 1: hi: 0, btch: 1 usd: 0
> DMA32 per-cpu:
> CPU 0: hi: 186, btch: 31 usd: 57
> CPU 1: hi: 186, btch: 31 usd: 0
> Active_anon:70104 active_file:1 inactive_anon:6557
> inactive_file:0 unevictable:0 dirty:0 writeback:0 unstable:0
> free:4062 slab:41969 mapped:541 pagetables:59663 bounce:0
77000 pages in anonymous memory, no swap online.
42000 pages in slab. Maybe this is a leak?
60000 pagetable pages. Seems rather a lot?
179000 pages accounted for above
> DMA free:3920kB min:60kB low:72kB high:88kB active_anon:2268kB inactive_anon:428kB active_file:0kB inactive_file:0kB unevictable:0kB present:15364kB pages_scanned:0 all_unreclaimable? no
> lowmem_reserve[]: 0 968 968 968
> DMA32 free:12328kB min:3948kB low:4932kB high:5920kB active_anon:278148kB inactive_anon:25800kB active_file:4kB inactive_file:0kB unevictable:0kB present:992032kB pages_scanned:0 all_unreclaimable? no
> lowmem_reserve[]: 0 0 0 0
> DMA: 8*4kB 0*8kB 1*16kB 1*32kB 2*64kB 1*128kB 0*256kB 1*512kB 1*1024kB 1*2048kB 0*4096kB = 3920kB
> DMA32: 2474*4kB 56*8kB 8*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 12328kB
present memory: 15364 + 992032 = 1007396kB. 250000 pages. It's a 1GB
box, yes?
> 1660 total pagecache pages
> 0 pages in swap cache
> Swap cache stats: add 0, delete 0, find 0/0
> Free swap = 0kB
> Total swap = 0kB
> 255744 pages RAM
> 5588 pages reserved
> 255749 pages shared
> 215785 pages non-shared
> Out of memory: kill process 6838 (msgctl11) score 152029 or a child
> Killed process 8850 (msgctl11)
afacit, 70000 pages are unaccounted for (leaked?)
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