linux-kernel - OOM killer unexpectedly called with kernel 2.6.32

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Date:	Fri, 25 Dec 2009 00:42:43 +0100
From:	"A. Boulan" <arnaud.boulan@...ertysurf.fr>
To:	linux-kernel@...r.kernel.org
Subject: OOM killer unexpectedly called with kernel 2.6.32

Hello,

When using kernel version 2.6.32.2 I have  a problem where the kernel calls the OOM killer
although there are still plenty of RAM and swap available.

I am able to easily reproduce the problem when there is a huge background file tansfer between
2 disks (cp -a of several Gigabytes), and then starting a few applications. In less than a minute
the kernel starts killing random processes (firefox, kmail, kdesktop, etc), although there is still
free (or buffers/cache) memory and the swap is not used at all...

I do not reproduce this problem when using kernel 2.6.31.8 (compiled with the same compiler, 
and with the same userspace)

I have no idea what could cause this problem. Any help will be appreciated.
Regards,

Arnaud

(please CC me for any reply, i'm not subscribed to the list)


Dec 24 18:16:03 picchu kernel: X invoked oom-killer: gfp_mask=0x0, order=0, oom_adj=0
Dec 24 18:16:03 picchu kernel: X cpuset=/ mems_allowed=0
Dec 24 18:16:03 picchu kernel: Pid: 10719, comm: X Not tainted 2.6.32.2 #1
Dec 24 18:16:03 picchu kernel: Call Trace:
Dec 24 18:16:03 picchu kernel: [<ffffffff8106d513>] ? cpuset_print_task_mems_allowed+0x8d/0x98
Dec 24 18:16:03 picchu kernel: [<ffffffff8108166c>] oom_kill_process+0x82/0x241
Dec 24 18:16:03 picchu kernel: [<ffffffff81052014>] ? ktime_get_ts+0xb1/0xbe
Dec 24 18:16:03 picchu kernel: [<ffffffff81081cfb>] __out_of_memory+0x134/0x14b
Dec 24 18:16:03 picchu kernel: [<ffffffff81081dff>] pagefault_out_of_memory+0x55/0x7a
Dec 24 18:16:03 picchu kernel: [<ffffffff8102594e>] mm_fault_error+0x3b/0xf6
Dec 24 18:16:03 picchu kernel: [<ffffffff81093639>] ? handle_mm_fault+0x359/0x6a4
Dec 24 18:16:03 picchu kernel: [<ffffffff81025b9d>] do_page_fault+0x194/0x1e3
Dec 24 18:16:03 picchu kernel: [<ffffffff813aed1f>] page_fault+0x1f/0x30
Dec 24 18:16:03 picchu kernel: Mem-Info:
Dec 24 18:16:03 picchu kernel: DMA per-cpu:
Dec 24 18:16:03 picchu kernel: CPU    0: hi:    0, btch:   1 usd:   0
Dec 24 18:16:03 picchu kernel: CPU    1: hi:    0, btch:   1 usd:   0
Dec 24 18:16:03 picchu kernel: DMA32 per-cpu:
Dec 24 18:16:03 picchu kernel: CPU    0: hi:  186, btch:  31 usd: 165
Dec 24 18:16:03 picchu kernel: CPU    1: hi:  186, btch:  31 usd:  64
Dec 24 18:16:03 picchu kernel: active_anon:155933 inactive_anon:54013 isolated_anon:0
Dec 24 18:16:03 picchu kernel: active_file:122843 inactive_file:129683 isolated_file:35
Dec 24 18:16:03 picchu kernel: unevictable:464 dirty:20768 writeback:18186 unstable:0
Dec 24 18:16:03 picchu kernel: free:3398 slab_reclaimable:22778 slab_unreclaimable:8060
Dec 24 18:16:03 picchu kernel: mapped:19607 shmem:63182 pagetables:8230 bounce:0
Dec 24 18:16:03 picchu kernel: DMA free:8004kB min:40kB low:48kB high:60kB active_anon:120kB inactive_anon:340kB active_file:1384kB inactive
_file:3672kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15368kB mlocked:0kB dirty:0kB writeback:0kB mapped:52kB shmem:0kB
 slab_reclaimable:2300kB slab_unreclaimable:4kB kernel_stack:8kB pagetables:100kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:0
all_unreclaimable? no
Dec 24 18:16:03 picchu kernel: lowmem_reserve[]: 0 1993 1993 1993
Dec 24 18:16:03 picchu kernel: DMA32 free:5588kB min:5692kB low:7112kB high:8536kB active_anon:623612kB inactive_anon:215712kB active_file:4
89988kB inactive_file:515060kB unevictable:1856kB isolated(anon):0kB isolated(file):140kB present:2041776kB mlocked:1856kB dirty:83072kB wri
teback:72744kB mapped:78376kB shmem:252728kB slab_reclaimable:88812kB slab_unreclaimable:32236kB kernel_stack:2416kB pagetables:32820kB unst
able:0kB bounce:0kB writeback_tmp:0kB pages_scanned:192 all_unreclaimable? no
Dec 24 18:16:03 picchu kernel: lowmem_reserve[]: 0 0 0 0
Dec 24 18:16:03 picchu kernel: DMA: 15*4kB 3*8kB 41*16kB 49*32kB 31*64kB 13*128kB 0*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 8004kB
Dec 24 18:16:03 picchu kernel: DMA32: 1129*4kB 14*8kB 8*16kB 2*32kB 0*64kB 0*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 5588kB
Dec 24 18:16:03 picchu kernel: 316114 total pagecache pages
Dec 24 18:16:03 picchu kernel: 0 pages in swap cache
Dec 24 18:16:03 picchu kernel: Swap cache stats: add 11, delete 11, find 1/3
Dec 24 18:16:03 picchu kernel: Free swap  = 2048248kB
Dec 24 18:16:03 picchu kernel: Total swap = 2048248kB
Dec 24 18:16:03 picchu kernel: 521616 pages RAM
Dec 24 18:16:03 picchu kernel: 9625 pages reserved
Dec 24 18:16:03 picchu kernel: 382065 pages shared
Dec 24 18:16:03 picchu kernel: 296585 pages non-shared
Dec 24 18:16:03 picchu kernel: Out of memory: kill process 3418 (kdesktop) score 967315 or a child
Dec 24 18:16:03 picchu kernel: Killed process 14144 (firefox)


View attachment "config-2.6.31.8" of type "text/plain" (63934 bytes)

View attachment "config-2.6.32.2" of type "text/plain" (65420 bytes)

View attachment "dmesg-2.6.32.2" of type "text/plain" (59697 bytes)

View attachment "cpuinfo" of type "text/x-c++hdr" (1508 bytes)

View attachment "dmesg-2.6.31.8" of type "text/plain" (59184 bytes)