[CentOS] oom situation

Oguz Yilmaz oguzyilmazlist at gmail.com
Mon Dec 30 08:02:49 UTC 2013


I have continous oom&panic situation unresolved. I am not sure system
fills up all the ram (36GB). Why this system triggered this oom
situation? Is it about some other memory? highmem? lowmem? stack size?

Best Regards,



Kernel 3.10.24


Dec 27 09:19:05 2013 kernel: : [277622.359064] squid invoked
oom-killer: gfp_mask=0x42d0, order=3, oom_score_adj=0
Dec 27 09:19:05 2013 kernel: : [277622.359069] squid cpuset=/ mems_allowed=0
Dec 27 09:19:05 2013 kernel: : [277622.359074] CPU: 9 PID: 15533 Comm:
squid Not tainted 3.10.24-1.lsg #1
Dec 27 09:19:05 2013 kernel: : [277622.359076] Hardware name: Intel
Thurley/Greencity, BIOS 080016  10/05/2011
Dec 27 09:19:05 2013 kernel: : [277622.359078]  00000003 e377b280
e03c3c38 c06472d6 e03c3c98 c04d2d96 c0a68f84 e377b580
Dec 27 09:19:05 2013 kernel: : [277622.359089]  000042d0 00000003
00000000 e03c3c64 c04abbda e42bd318 00000000 e03c3cf4
Dec 27 09:19:05 2013 kernel: : [277622.359096]  000042d0 00000001
00000247 00000000 e03c3c94 c04d3d5f 00000001 00000042
Dec 27 09:19:05 2013 kernel: : [277622.359105] Call Trace:
Dec 27 09:19:05 2013 kernel: : [277622.359116]  [<c06472d6>]
dump_stack+0x16/0x20
Dec 27 09:19:05 2013 kernel: : [277622.359121]  [<c04d2d96>]
dump_header+0x66/0x1c0
Dec 27 09:19:05 2013 kernel: : [277622.359127]  [<c04abbda>] ?
__delayacct_freepages_end+0x3a/0x40
Dec 27 09:19:05 2013 kernel: : [277622.359131]  [<c04d3d5f>] ?
zone_watermark_ok+0x2f/0x40
Dec 27 09:19:05 2013 kernel: : [277622.359135]  [<c04d2f27>]
check_panic_on_oom+0x37/0x60
Dec 27 09:19:05 2013 kernel: : [277622.359138]  [<c04d36d2>]
out_of_memory+0x92/0x250
Dec 27 09:19:05 2013 kernel: : [277622.359144]  [<c04dd1fa>] ?
wakeup_kswapd+0xda/0x120
Dec 27 09:19:05 2013 kernel: : [277622.359148]  [<c04d6cee>]
__alloc_pages_nodemask+0x68e/0x6a0
Dec 27 09:19:05 2013 kernel: : [277622.359155]  [<c0801c1e>]
sk_page_frag_refill+0x7e/0x120
Dec 27 09:19:05 2013 kernel: : [277622.359160]  [<c084b8c7>]
tcp_sendmsg+0x387/0xbf0
Dec 27 09:19:05 2013 kernel: : [277622.359166]  [<c0469a2f>] ?
put_prev_task_fair+0x1f/0x350
Dec 27 09:19:05 2013 kernel: : [277622.359173]  [<c0ba7d8b>] ?
longrun_init+0x2b/0x30
Dec 27 09:19:05 2013 kernel: : [277622.359177]  [<c084b540>] ?
tcp_tso_segment+0x380/0x380
Dec 27 09:19:05 2013 kernel: : [277622.359182]  [<c086d0da>]
inet_sendmsg+0x4a/0xa0
Dec 27 09:19:05 2013 kernel: : [277622.359186]  [<c07ff3a6>]
sock_aio_write+0x116/0x130
Dec 27 09:19:05 2013 kernel: : [277622.359191]  [<c0457acc>] ?
hrtimer_try_to_cancel+0x3c/0xb0
Dec 27 09:19:05 2013 kernel: : [277622.359197]  [<c050b208>]
do_sync_write+0x68/0xa0
Dec 27 09:19:05 2013 kernel: : [277622.359202]  [<c050caa0>]
vfs_write+0x190/0x1b0
Dec 27 09:19:05 2013 kernel: : [277622.359206]  [<c050cbb3>] SyS_write+0x53/0x80
Dec 27 09:19:05 2013 kernel: : [277622.359211]  [<c08f72ba>]
sysenter_do_call+0x12/0x22
Dec 27 09:19:05 2013 kernel: : [277622.359213] Mem-Info:
Dec 27 09:19:05 2013 kernel: : [277622.359215] DMA per-cpu:
Dec 27 09:19:05 2013 kernel: : [277622.359218] CPU    0: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359220] CPU    1: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359222] CPU    2: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359224] CPU    3: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359226] CPU    4: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359228] CPU    5: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359230] CPU    6: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359232] CPU    7: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359234] CPU    8: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359236] CPU    9: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359238] CPU   10: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359240] CPU   11: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359242] CPU   12: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359244] CPU   13: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359246] CPU   14: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359248] CPU   15: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359250] CPU   16: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359253] CPU   17: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359255] CPU   18: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359258] CPU   19: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359260] CPU   20: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359262] CPU   21: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359264] CPU   22: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359266] CPU   23: hi:    0,
btch:   1 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359268] Normal per-cpu:
Dec 27 09:19:05 2013 kernel: : [277622.359270] CPU    0: hi:  186,
btch:  31 usd:  34
Dec 27 09:19:05 2013 kernel: : [277622.359272] CPU    1: hi:  186,
btch:  31 usd:  72
Dec 27 09:19:05 2013 kernel: : [277622.359274] CPU    2: hi:  186,
btch:  31 usd:  40
Dec 27 09:19:05 2013 kernel: : [277622.359276] CPU    3: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359279] CPU    4: hi:  186,
btch:  31 usd:  39
Dec 27 09:19:05 2013 kernel: : [277622.359281] CPU    5: hi:  186,
btch:  31 usd:  49
Dec 27 09:19:05 2013 kernel: : [277622.359283] CPU    6: hi:  186,
btch:  31 usd:  50
Dec 27 09:19:05 2013 kernel: : [277622.359285] CPU    7: hi:  186,
btch:  31 usd:  25
Dec 27 09:19:05 2013 kernel: : [277622.359286] CPU    8: hi:  186,
btch:  31 usd:  42
Dec 27 09:19:05 2013 kernel: : [277622.359289] CPU    9: hi:  186,
btch:  31 usd:  39
Dec 27 09:19:05 2013 kernel: : [277622.359290] CPU   10: hi:  186,
btch:  31 usd: 155
Dec 27 09:19:05 2013 kernel: : [277622.359293] CPU   11: hi:  186,
btch:  31 usd:  56
Dec 27 09:19:05 2013 kernel: : [277622.359295] CPU   12: hi:  186,
btch:  31 usd:   2
Dec 27 09:19:05 2013 kernel: : [277622.359297] CPU   13: hi:  186,
btch:  31 usd: 162
Dec 27 09:19:05 2013 kernel: : [277622.359299] CPU   14: hi:  186,
btch:  31 usd:  67
Dec 27 09:19:05 2013 kernel: : [277622.359301] CPU   15: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359303] CPU   16: hi:  186,
btch:  31 usd:  68
Dec 27 09:19:05 2013 kernel: : [277622.359305] CPU   17: hi:  186,
btch:  31 usd:  38
Dec 27 09:19:05 2013 kernel: : [277622.359307] CPU   18: hi:  186,
btch:  31 usd:  56
Dec 27 09:19:05 2013 kernel: : [277622.359308] CPU   19: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359310] CPU   20: hi:  186,
btch:  31 usd:  54
Dec 27 09:19:05 2013 kernel: : [277622.359312] CPU   21: hi:  186,
btch:  31 usd:  35
Dec 27 09:19:05 2013 kernel: : [277622.359314] CPU   22: hi:  186,
btch:  31 usd:   2
Dec 27 09:19:05 2013 kernel: : [277622.359316] CPU   23: hi:  186,
btch:  31 usd:  60
Dec 27 09:19:05 2013 kernel: : [277622.359318] HighMem per-cpu:
Dec 27 09:19:05 2013 kernel: : [277622.359320] CPU    0: hi:  186,
btch:  31 usd:  32
Dec 27 09:19:05 2013 kernel: : [277622.359322] CPU    1: hi:  186,
btch:  31 usd:  52
Dec 27 09:19:05 2013 kernel: : [277622.359324] CPU    2: hi:  186,
btch:  31 usd:   9
Dec 27 09:19:05 2013 kernel: : [277622.359326] CPU    3: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359328] CPU    4: hi:  186,
btch:  31 usd: 125
Dec 27 09:19:05 2013 kernel: : [277622.359330] CPU    5: hi:  186,
btch:  31 usd: 116
Dec 27 09:19:05 2013 kernel: : [277622.359332] CPU    6: hi:  186,
btch:  31 usd: 126
Dec 27 09:19:05 2013 kernel: : [277622.359333] CPU    7: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359336] CPU    8: hi:  186,
btch:  31 usd:  79
Dec 27 09:19:05 2013 kernel: : [277622.359338] CPU    9: hi:  186,
btch:  31 usd:  34
Dec 27 09:19:05 2013 kernel: : [277622.359340] CPU   10: hi:  186,
btch:  31 usd: 111
Dec 27 09:19:05 2013 kernel: : [277622.359341] CPU   11: hi:  186,
btch:  31 usd: 144
Dec 27 09:19:05 2013 kernel: : [277622.359343] CPU   12: hi:  186,
btch:  31 usd:  15
Dec 27 09:19:05 2013 kernel: : [277622.359345] CPU   13: hi:  186,
btch:  31 usd: 166
Dec 27 09:19:05 2013 kernel: : [277622.359347] CPU   14: hi:  186,
btch:  31 usd: 185
Dec 27 09:19:05 2013 kernel: : [277622.359349] CPU   15: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359351] CPU   16: hi:  186,
btch:  31 usd:  58
Dec 27 09:19:05 2013 kernel: : [277622.359353] CPU   17: hi:  186,
btch:  31 usd: 122
Dec 27 09:19:05 2013 kernel: : [277622.359356] CPU   18: hi:  186,
btch:  31 usd: 170
Dec 27 09:19:05 2013 kernel: : [277622.359358] CPU   19: hi:  186,
btch:  31 usd:   0
Dec 27 09:19:05 2013 kernel: : [277622.359360] CPU   20: hi:  186,
btch:  31 usd:  30
Dec 27 09:19:05 2013 kernel: : [277622.359362] CPU   21: hi:  186,
btch:  31 usd:  33
Dec 27 09:19:05 2013 kernel: : [277622.359364] CPU   22: hi:  186,
btch:  31 usd:  28
Dec 27 09:19:05 2013 kernel: : [277622.359366] CPU   23: hi:  186,
btch:  31 usd:  44
Dec 27 09:19:05 2013 kernel: : [277622.359371] active_anon:658515
inactive_anon:54399 isolated_anon:0
Dec 27 09:19:05 2013 kernel: : [277622.359371]  active_file:1172176
inactive_file:323606 isolated_file:0
Dec 27 09:19:05 2013 kernel: : [277622.359371]  unevictable:0 dirty:0
writeback:0 unstable:0
Dec 27 09:19:05 2013 kernel: : [277622.359371]  free:6911872
slab_reclaimable:29430 slab_unreclaimable:34726
Dec 27 09:19:05 2013 kernel: : [277622.359371]  mapped:45784
shmem:9850 pagetables:107714 bounce:0
Dec 27 09:19:05 2013 kernel: : [277622.359371]  free_cma:0
Dec 27 09:19:05 2013 kernel: : [277622.359382] DMA free:2332kB
min:36kB low:44kB high:52kB active_anon:0kB inactive_anon:0kB
active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB
isolated(file):0kB present:15968kB managed:6960kB mlocked:0kB
dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:8kB
slab_unreclaimable:288kB kernel_stack:0kB pagetables:0kB unstable:0kB
bounce:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0
all_unreclaimable? yes
Dec 27 09:19:05 2013 kernel: : [277622.359384] lowmem_reserve[]: 0 573
36539 36539
Dec 27 09:19:05 2013 kernel: : [277622.359393] Normal free:114488kB
min:3044kB low:3804kB high:4564kB active_anon:0kB inactive_anon:0kB
active_file:252kB inactive_file:256kB unevictable:0kB
isolated(anon):0kB isolated(file):0kB present:894968kB
managed:587540kB mlocked:0kB dirty:0kB writeback:0kB mapped:4kB
shmem:0kB slab_reclaimable:117712kB slab_unreclaimable:138616kB
kernel_stack:11976kB pagetables:0kB unstable:0kB bounce:0kB
free_cma:0kB writeback_tmp:0kB pages_scanned:982 all_unreclaimable?
yes
Dec 27 09:19:05 2013 kernel: : [277622.359395] lowmem_reserve[]: 0 0
287725 287725
Dec 27 09:19:05 2013 kernel: : [277622.359404] HighMem free:27530668kB
min:512kB low:48272kB high:96036kB active_anon:2634060kB
inactive_anon:217596kB active_file:4688452kB inactive_file:1294168kB
unevictable:0kB isolated(anon):0kB isolated(file):0kB
present:36828872kB managed:36828872kB mlocked:0kB dirty:0kB
writeback:0kB mapped:183132kB shmem:39400kB slab_reclaimable:0kB
slab_unreclaimable:0kB kernel_stack:0kB pagetables:430856kB
unstable:0kB bounce:367564104kB free_cma:0kB writeback_tmp:0kB
pages_scanned:0 all_unreclaimable? no
Dec 27 09:19:05 2013 kernel: : [277622.359406] lowmem_reserve[]: 0 0 0 0
Dec 27 09:19:05 2013 kernel: : [277622.359410] DMA: 3*4kB (U) 2*8kB
(U) 4*16kB (U) 5*32kB (U) 2*64kB (U) 0*128kB 0*256kB 0*512kB 0*1024kB
1*2048kB (R) 0*4096kB = 2428kB
Dec 27 09:19:05 2013 kernel: : [277622.359422] Normal: 5360*4kB (UEM)
3667*8kB (UEM) 3964*16kB (UEMR) 13*32kB (MR) 0*64kB 1*128kB (R)
1*256kB (R) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 115000kB
Dec 27 09:19:05 2013 kernel: : [277622.359435] HighMem: 6672*4kB (M)
74585*8kB (UM) 40828*16kB (UM) 17275*32kB (UM) 3314*64kB (UM)
1126*128kB (UM) 992*256kB (UM) 585*512kB (UM) 225*1024kB (UM)
78*2048kB (UMR) 5957*4096kB (UM) = 27529128kB
Dec 27 09:19:05 2013 kernel: : [277622.359452] Node 0
hugepages_total=0 hugepages_free=0 hugepages_surp=0
hugepages_size=2048kB
Dec 27 09:19:05 2013 kernel: : [277622.359454] 1505509 total pagecache pages
Dec 27 09:19:05 2013 kernel: : [277622.359457] 4 pages in swap cache
Dec 27 09:19:05 2013 kernel: : [277622.359459] Swap cache stats: add
13, delete 9, find 0/0
Dec 27 09:19:05 2013 kernel: : [277622.359460] Free swap  = 35318812kB
Dec 27 09:19:05 2013 kernel: : [277622.359462] Total swap = 35318864kB
Dec 27 09:19:05 2013 kernel: : [277622.450529] 9699327 pages RAM
Dec 27 09:19:05 2013 kernel: : [277622.450532] 9471490 pages HighMem
Dec 27 09:19:05 2013 kernel: : [277622.450533] 342749 pages reserved
Dec 27 09:19:05 2013 kernel: : [277622.450534] 2864256 pages shared
Dec 27 09:19:05 2013 kernel: : [277622.450535] 1501243 pages non-shared
Dec 27 09:19:05 2013 kernel: : [277622.450538] Kernel panic - not
syncing: Out of memory: system-wide panic_on_oom is enabled

Dec 27 09:19:05 2013 kernel: : [277622.450538]



# cat /proc/meminfo
MemTotal:       37426312 kB
MemFree:        28328992 kB
Buffers:           94728 kB
Cached:          6216068 kB
SwapCached:            0 kB
Active:          6958572 kB
Inactive:        1815380 kB
Active(anon):    2329152 kB
Inactive(anon):   170252 kB
Active(file):    4629420 kB
Inactive(file):  1645128 kB
Unevictable:           0 kB
Mlocked:               0 kB
HighTotal:      36828872 kB
HighFree:       28076144 kB
LowTotal:         597440 kB
LowFree:          252848 kB
SwapTotal:      35318864 kB
SwapFree:       35318860 kB
Dirty:                 0 kB
Writeback:             8 kB
AnonPages:       2463512 kB
Mapped:           162296 kB
Shmem:             36332 kB
Slab:             208676 kB
SReclaimable:     120872 kB
SUnreclaim:        87804 kB
KernelStack:        6320 kB
PageTables:        42280 kB
NFS_Unstable:          0 kB
Bounce:              124 kB
WritebackTmp:          0 kB
CommitLimit:    54032020 kB
Committed_AS:    3191916 kB
VmallocTotal:     122880 kB
VmallocUsed:       27088 kB
VmallocChunk:      29312 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
DirectMap4k:       10232 kB
DirectMap2M:      901120 kB


sysctl:

vm.oom_dump_tasks = 0
vm.oom_kill_allocating_task = 1
vm.panic_on_oom = 1

vm.admin_reserve_kbytes = 8192
vm.block_dump = 0
vm.dirty_background_bytes = 0
vm.dirty_background_ratio = 10
vm.dirty_bytes = 0
vm.dirty_expire_centisecs = 3000
vm.dirty_ratio = 20
vm.dirty_writeback_centisecs = 500
vm.drop_caches = 0
vm.highmem_is_dirtyable = 0
vm.hugepages_treat_as_movable = 0
vm.hugetlb_shm_group = 0
vm.laptop_mode = 0
vm.legacy_va_layout = 0
vm.lowmem_reserve_ratio = 256   32      32
vm.max_map_count = 65530
vm.min_free_kbytes = 3084
vm.mmap_min_addr = 4096
vm.nr_hugepages = 0
vm.nr_overcommit_hugepages = 0
vm.nr_pdflush_threads = 0
vm.overcommit_memory = 0
vm.overcommit_ratio = 50
vm.page-cluster = 3
vm.percpu_pagelist_fraction = 0
vm.scan_unevictable_pages = 0
vm.stat_interval = 1
vm.swappiness = 30
vm.user_reserve_kbytes = 131072
vm.vdso_enabled = 1
vm.vfs_cache_pressure = 100

# ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 292370
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 36728
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 292370
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited



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