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SubjectKernel 2.6.29 runs out of memory and hangs. V1.1
From
Before I rebooted the machine, we also got these messages. The machine
basically just hung and when I typed from the keyboard it would not
show on the screen:

Apr 24 09:01:06 thinpower [1349923.492053] Node 0 Normal per-cpu:
Apr 24 09:01:06 thinpower [1349923.492055] CPU 0: hi: 186, btch:
31 usd: 50
Apr 24 09:01:06 thinpower [1349923.492056] CPU 1: hi: 186, btch:
31 usd: 20
Apr 24 09:01:06 thinpower [1349923.492057] CPU 2: hi: 186, btch:
31 usd: 42
Apr 24 09:01:06 thinpower [1349923.492059] CPU 3: hi: 186, btch:
31 usd: 124
Apr 24 09:01:06 thinpower [1349923.492060] CPU 4: hi: 186, btch:
31 usd: 104
Apr 24 09:01:06 thinpower [1349923.492061] CPU 5: hi: 186, btch:
31 usd: 95
Apr 24 09:01:06 thinpower [1349923.492062] CPU 6: hi: 186, btch:
31 usd: 178
Apr 24 09:01:06 thinpower [1349923.492064] CPU 7: hi: 186, btch:
31 usd: 60
Apr 24 09:01:06 thinpower [1349923.492066] Active_anon:7595417
active_file:641 inactive_anon:551929
Apr 24 09:01:06 thinpower [1349923.492067] inactive_file:5122
unevictable:0 dirty:0 writeback:0 unstable:0
Apr 24 09:01:06 thinpower [1349923.492068] free:39401 slab:12443
mapped:1801 pagetables:22566 bounce:0
Apr 24 09:01:06 thinpower [1349923.492069] Node 0 DMA free:15700kB
min:8kB low:8kB high:12kB active_anon:0kB inactive_anon:0kB
active_file:0kB inactive_file:0kB unevictable:0kB present:15156kB
pages_scanned:0 all_unreclaimable? yes
Apr 24 09:01:06 thinpower [1349923.492073] lowmem_reserve[]: 0 3255 32292 32292
Apr 24 09:01:06 thinpower [1349923.492076] Node 0 DMA32 free:118848kB
min:2316kB low:2892kB high:3472kB active_anon:2265276kB
inactive_anon:452944kB active_file:4kB inactive_file:0kB
unevictable:0kB present:3333280kB pages_scanned:2692832
all_unreclaimable? no
Apr 24 09:01:06 thinpower [1349923.492080] lowmem_reserve[]: 0 0 29037 29037
Apr 24 09:01:06 thinpower [1349923.492082] Node 0 Normal free:23056kB
min:20672kB low:25840kB high:31008kB active_anon:28116392kB
inactive_anon:1754772kB active_file:2560kB inactive_file:20488kB
unevictable:0kB present:29734400kB pages_scanned:77696
all_unreclaimable? no
Apr 24 09:01:06 thinpower [1349923.492086] lowmem_reserve[]: 0 0 0 0
Apr 24 09:01:06 thinpower [1349923.492088] Node 0 DMA: 1*4kB 0*8kB
1*16kB 2*32kB 2*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 1*2048kB
3*4096kB = 15700kB
Apr 24 09:01:06 thinpower [1349923.492095] Node 0 DMA32: 172*4kB
134*8kB 66*16kB 18*32kB 18*64kB 7*128kB 21*256kB 15*512kB 6*1024kB
2*2048kB 22*4096kB = 118848kB
Apr 24 09:01:06 thinpower [1349923.492101] Node 0 Normal: 251*4kB
24*8kB 144*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 0*1024kB
1*2048kB 4*4096kB = 22924kB
Apr 24 09:01:06 thinpower [1349923.492107] 12705 total pagecache pages
Apr 24 09:01:06 thinpower [1349923.492108] 0 pages in swap cache
Apr 24 09:01:06 thinpower [1349923.492109] Swap cache stats: add 0,
delete 0, find 0/0
Apr 24 09:01:06 thinpower [1349923.492110] Free swap = 0kB
Apr 24 09:01:06 thinpower [1349923.492111] Total swap = 0kB
Apr 24 09:01:06 thinpower [1349923.693323] 8388592 pages RAM
Apr 24 09:01:06 thinpower [1349923.693326] 136791 pages reserved
Apr 24 09:01:06 thinpower [1349923.693327] 69633 pages shared
Apr 24 09:01:06 thinpower [1349923.693328] 8205493 pages non-shared
Apr 24 09:01:06 thinpower [1349923.693331] Out of memory: kill process
21490 (apache2) score 53801 or a child
Apr 24 09:01:06 thinpower [1349923.693410] Killed process 21490 (apache2)

This is the last message before the reboot in /var/log/kernel/current.

Best
Zeno

---------- Forwarded message ----------
From: Zeno Davatz <zdavatz@gmail.com>
Date: Fri, Apr 24, 2009 at 12:09 PM
Subject: Kernel 2.6.29 runs out of memory and hangs.
To: linux-kernel@vger.kernel.org
Cc: Hannes Wyss <hwyss@ywesee.com>


Dear All

Our Kernel-Version:

Linux thinpower 2.6.29 #5 SMP Sun Apr 5 20:04:08 UTC 2009 x86_64
Intel(R) Xeon(R) CPU E5450 @ 3.00GHz GenuineIntel GNU/Linux

This morning our Server ran out of memory and had to be hard rebooted.
The system hast 32 GB or memory and 4 QuadCore Xeon CPUs.
/var/log/kernel/current tells us the following:

Apr 24 09:01:06 thinpower [1349923.491914] postgres invoked
oom-killer: gfp_mask=0x1201d2, order=0, oomkilladj=0
Apr 24 09:01:06 thinpower [1349923.491919] postgres cpuset=/ mems_allowed=0
Apr 24 09:01:06 thinpower [1349923.491922] Pid: 2393, comm: postgres
Not tainted 2.6.29 #5
Apr 24 09:01:06 thinpower [1349923.491924] Call Trace:
Apr 24 09:01:06 thinpower [1349923.491934]  [<ffffffff8106eda9>] ?
cpuset_print_task_mems_allowed+0x99/0x9f
Apr 24 09:01:06 thinpower [1349923.491939]  [<ffffffff81083d28>]
oom_kill_process+0x96/0x246
Apr 24 09:01:06 thinpower [1349923.491942]  [<ffffffff8106dcf0>] ?
cpuset_mems_allowed_intersects+0x1c/0x1e
Apr 24 09:01:06 thinpower [1349923.491944]  [<ffffffff810840a5>] ?
badness+0x1a3/0x1e6
Apr 24 09:01:06 thinpower [1349923.491946]  [<ffffffff8108421c>]
__out_of_memory+0x134/0x14b
Apr 24 09:01:06 thinpower [1349923.491949]  [<ffffffff8108438b>]
out_of_memory+0x158/0x18a
Apr 24 09:01:06 thinpower [1349923.491951]  [<ffffffff81087906>]
__alloc_pages_internal+0x372/0x434
Apr 24 09:01:06 thinpower [1349923.491954]  [<ffffffff810aa490>]
alloc_pages_current+0xb9/0xc2
Apr 24 09:01:06 thinpower [1349923.491957]  [<ffffffff81081a59>]
__page_cache_alloc+0x67/0x6b
Apr 24 09:01:06 thinpower [1349923.491959]  [<ffffffff81089426>]
__do_page_cache_readahead+0x96/0x192
Apr 24 09:01:06 thinpower [1349923.491961]  [<ffffffff81089575>]
do_page_cache_readahead+0x53/0x60
Apr 24 09:01:06 thinpower [1349923.491963]  [<ffffffff81081ec7>]
filemap_fault+0x15e/0x313
Apr 24 09:01:06 thinpower [1349923.491967]  [<ffffffff81094451>]
__do_fault+0x53/0x393
Apr 24 09:01:06 thinpower [1349923.491969]  [<ffffffff81030531>] ?
__wake_up_sync+0x45/0x4e
Apr 24 09:01:06 thinpower [1349923.491972]  [<ffffffff81096702>]
handle_mm_fault+0x36b/0x854
Apr 24 09:01:06 thinpower [1349923.491976]  [<ffffffff813a1acb>] ?
release_sock+0xb0/0xbb
Apr 24 09:01:06 thinpower [1349923.491979]  [<ffffffff81022c8f>] ?
default_spin_lock_flags+0x9/0xe
Apr 24 09:01:06 thinpower [1349923.491984]  [<ffffffff814ac6fe>]
do_page_fault+0x662/0xa5c
Apr 24 09:01:06 thinpower [1349923.491988]  [<ffffffff81400b8e>] ?
inet_sendmsg+0x46/0x53
Apr 24 09:01:06 thinpower [1349923.491992]  [<ffffffff8139ed97>] ?
__sock_sendmsg+0x59/0x62
Apr 24 09:01:06 thinpower [1349923.491994]  [<ffffffff8139f6d8>] ?
sock_sendmsg+0xc7/0xe0
Apr 24 09:01:06 thinpower [1349923.491996]  [<ffffffff81086b5e>] ?
free_pages+0x32/0x36
Apr 24 09:01:06 thinpower [1349923.492000]  [<ffffffff8104e7ec>] ?
autoremove_wake_function+0x0/0x38
Apr 24 09:01:06 thinpower [1349923.492004]  [<ffffffff810c1d76>] ?
core_sys_select+0x1df/0x213
Apr 24 09:01:06 thinpower [1349923.492007]  [<ffffffff810b2cc2>] ?
nameidata_to_filp+0x41/0x52
Apr 24 09:01:06 thinpower [1349923.492009]  [<ffffffff8139f028>] ?
sockfd_lookup_light+0x1b/0x54
Apr 24 09:01:06 thinpower [1349923.492013]  [<ffffffff81011ac8>] ?
read_tsc+0xe/0x24
Apr 24 09:01:06 thinpower [1349923.492017]  [<ffffffff81055990>] ?
getnstimeofday+0x58/0xb4
Apr 24 09:01:06 thinpower [1349923.492019]  [<ffffffff810516ed>] ?
ktime_get_ts+0x49/0x4e
Apr 24 09:01:06 thinpower [1349923.492022]  [<ffffffff810c0d35>] ?
poll_select_copy_remaining+0xc5/0xea
Apr 24 09:01:06 thinpower [1349923.492023]  [<ffffffff810c1ff3>] ?
sys_select+0xa7/0xbc
Apr 24 09:01:06 thinpower [1349923.492026]  [<ffffffff814aa305>]
page_fault+0x25/0x30

Before that we had this:

Apr 24 08:59:24 thinpower [1349806.982419] 6954 total pagecache pages
Apr 24 08:59:24 thinpower [1349806.982420] 0 pages in swap cache
Apr 24 08:59:24 thinpower [1349806.982422] Swap cache stats: add 0,
delete 0, find 0/0
Apr 24 08:59:24 thinpower [1349806.982423] Free swap  = 0kB
Apr 24 08:59:24 thinpower [1349806.982423] Total swap = 0kB
Apr 24 08:59:24 thinpower [1349807.182725] 8388592 pages RAM
Apr 24 08:59:24 thinpower [1349807.182728] 136791 pages reserved
Apr 24 08:59:24 thinpower [1349807.182729] 35053 pages shared
Apr 24 08:59:24 thinpower [1349807.182729] 8207346 pages non-shared
Apr 24 08:59:24 thinpower [1349807.182732] Out of memory: kill process
21592 (ruby) score 109489 or a child
Apr 24 08:59:24 thinpower [1349807.182795] Killed process 21592 (ruby)
Apr 24 09:00:59 thinpower [1349916.949909] apache2 invoked oom-killer:
gfp_mask=0x1201d2, order=0, oomkilladj=0
Apr 24 09:01:00 thinpower [1349916.949915] apache2 cpuset=/ mems_allowed=0
Apr 24 09:01:00 thinpower [1349916.949918] Pid: 21599, comm: apache2
Not tainted 2.6.29 #5
Apr 24 09:01:00 thinpower [1349916.949920] Call Trace:
Apr 24 09:01:00 thinpower [1349916.949930]  [<ffffffff8106eda9>] ?
cpuset_print_task_mems_allowed+0x99/0x9f
Apr 24 09:01:00 thinpower [1349916.949936]  [<ffffffff81083d28>]
oom_kill_process+0x96/0x246
Apr 24 09:01:00 thinpower [1349916.949938]  [<ffffffff8106dcf0>] ?
cpuset_mems_allowed_intersects+0x1c/0x1e
Apr 24 09:01:00 thinpower [1349916.949940]  [<ffffffff810840a5>] ?
badness+0x1a3/0x1e6
Apr 24 09:01:00 thinpower [1349916.949942]  [<ffffffff8108421c>]
__out_of_memory+0x134/0x14b
Apr 24 09:01:00 thinpower [1349916.949945]  [<ffffffff8108438b>]
out_of_memory+0x158/0x18a
Apr 24 09:01:00 thinpower [1349916.949947]  [<ffffffff81087906>]
__alloc_pages_internal+0x372/0x434
Apr 24 09:01:00 thinpower [1349916.949950]  [<ffffffff810aa490>]
alloc_pages_current+0xb9/0xc2
Apr 24 09:01:00 thinpower [1349916.949953]  [<ffffffff81081a59>]
__page_cache_alloc+0x67/0x6b
Apr 24 09:01:00 thinpower [1349916.949954]  [<ffffffff81081841>] ?
sync_page+0x0/0x40
Apr 24 09:01:00 thinpower [1349916.949957]  [<ffffffff81089426>]
__do_page_cache_readahead+0x96/0x192
Apr 24 09:01:00 thinpower [1349916.949959]  [<ffffffff81089575>]
do_page_cache_readahead+0x53/0x60
Apr 24 09:01:00 thinpower [1349916.949961]  [<ffffffff81081ec7>]
filemap_fault+0x15e/0x313
Apr 24 09:01:00 thinpower [1349916.949964]  [<ffffffff81094451>]
__do_fault+0x53/0x393
Apr 24 09:01:00 thinpower [1349916.949967]  [<ffffffff81096702>]
handle_mm_fault+0x36b/0x854
Apr 24 09:01:00 thinpower [1349916.949971]  [<ffffffff8100cf6e>] ?
apic_timer_interrupt+0xe/0x20
Apr 24 09:01:00 thinpower [1349916.949974]  [<ffffffff81022c8f>] ?
default_spin_lock_flags+0x9/0xe
Apr 24 09:01:00 thinpower [1349916.949976]  [<ffffffff81022c8f>] ?
default_spin_lock_flags+0x9/0xe
Apr 24 09:01:00 thinpower [1349916.949981]  [<ffffffff814ac6fe>]
do_page_fault+0x662/0xa5c
Apr 24 09:01:00 thinpower [1349916.949985]  [<ffffffff813a1acb>] ?
release_sock+0xb0/0xbb
Apr 24 09:01:00 thinpower [1349916.949989]  [<ffffffff813e6628>] ?
tcp_recvmsg+0x720/0x833
Apr 24 09:01:00 thinpower [1349916.949991]  [<ffffffff813a0eb6>] ?
sock_common_recvmsg+0x32/0x47
Apr 24 09:01:00 thinpower [1349916.949995]  [<ffffffff81198a02>] ?
selinux_socket_recvmsg+0x1d/0x1f
Apr 24 09:01:00 thinpower [1349916.949999]  [<ffffffff8139ef03>] ?
__sock_recvmsg+0x6d/0x79
Apr 24 09:01:00 thinpower [1349916.950001]  [<ffffffff8139effd>] ?
sock_aio_read+0xee/0xfe
Apr 24 09:01:00 thinpower [1349916.950005]  [<ffffffff810b42b3>] ?
do_sync_read+0xe7/0x12d
Apr 24 09:01:00 thinpower [1349916.950008]  [<ffffffff813f22bd>] ?
tcp_write_xmit+0x453/0x913

Thank your for Feedback.

Best regards
Zeno Davatz
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