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Date:	Tue, 5 Feb 2008 16:38:18 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Michael Bussmann <bus@...net.net>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: OOM killer on idle machine

On Tue, Feb 05, 2008 at 11:04:23AM +0100, Michael Bussmann wrote:
> Hi,
> 
> I'm currently experiencing strange OOM errors on a machine with 8 GB RAM,
> 16 GB swap (Xeon 5150).  After about 5 days uptime the box starts to
> spit out OOM messages.
> 
> The box is mostly idle, so I haven't got any idea what is consuming memory.
> Looking at the output of free it seems that the box has plenty of memory
> left, so I'd be thankful if anybody could shed some light on this issue.
> 
> Thanks in advance for any information.
> 
> Cheers,
> MB
> 
> PS: Please CC me in replies
> 
> Kernel: 2.6.23.14 (also happened with 2.6.23.9 (self-compiled), both with
> SLUB) and linux-image-2.6.22-3-686-bigmem (Debian kernel).
> RAM: 8 GB
> HDD: 2 x 320 GB SATA AHCI (Software RAID-1)
>      6 x 320 GB SATA 3Ware 9650SE-8LPML (3w_9xxx driver)
> 
> Output of free during OOM-situation:
>              total       used       free     shared    buffers     cached
> Mem:       8300144     910360    7389784          0      10588      39460
> -/+ buffers/cache:     860312    7439832
> Swap:     16777208          0   16777208
> 
> First OOM message in syslog:
> 
> Feb  4 16:15:15 kernel: df_inode invoked oom-killer: gfp_mask=0xd0, order=0, oomkilladj=0
> Feb  4 16:15:16 kernel:  [<c01408cb>] out_of_memory+0x69/0x18e
> Feb  4 16:15:16 kernel:  [<c0141eca>] __alloc_pages+0x1fc/0x283
> Feb  4 16:15:16 kernel:  [<c0141f8a>] __get_free_pages+0x39/0x47
> Feb  4 16:15:16 kernel:  [<c011bbc8>] copy_process+0x89/0x1051
> Feb  4 16:15:16 kernel: df_inode invoked oom-killer: gfp_mask=0x40d0, order=1, oomkilladj=0
> Feb  4 16:15:16 kernel:  [<c01408cb>] out_of_memory+0x69/0x18e
> Feb  4 16:15:16 kernel:  [<c0141eca>] __alloc_pages+0x1fc/0x283
> Feb  4 16:15:16 kernel:  [<c0156ef4>] __slab_alloc+0x178/0x475
> Feb  4 16:15:16 kernel:  [<c0157307>] kmem_cache_alloc+0x3c/0x83
> Feb  4 16:15:16 kernel:  [<c0115087>] pgd_alloc+0x58/0xb9
> Feb  4 16:15:16 kernel:  [<c0115087>] pgd_alloc+0x58/0xb9
> Feb  4 16:15:16 kernel:  [<c011b9dd>] mm_init+0xa1/0xc3
> Feb  4 16:15:16 kernel:  [<c015d6d6>] bprm_mm_init+0xf/0x14f
> Feb  4 16:15:16 kernel:  [<c015e4f2>] do_execve+0x62/0x16a
> Feb  4 16:15:16 kernel:  [<c01011a8>] sys_execve+0x2f/0x7b
> Feb  4 16:15:16 kernel:  [<c010285a>] sysenter_past_esp+0x5f/0x85
> Feb  4 16:15:16 kernel:  [<c0330000>] gss_refresh+0xca/0x103
> Feb  4 16:15:16 kernel:  =======================
> Feb  4 16:15:16 kernel: Mem-info:
> Feb  4 16:15:16 kernel: DMA per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: Normal per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  25   Cold: hi:   62, btch:  15 usd:  55
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd:  28   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  31   Cold: hi:   62, btch:  15 usd:  57
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd:  36   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: HighMem per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  74   Cold: hi:   62, btch:  15 usd:   6
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd: 144   Cold: hi:   62, btch:  15 usd:  13
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  90   Cold: hi:   62, btch:  15 usd:  10
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd: 132   Cold: hi:   62, btch:  15 usd:  12
> Feb  4 16:15:16 kernel: Active:23868 inactive:10724 dirty:2 writeback:0 unstable:0
> Feb  4 16:15:16 kernel:  free:1832856 slab:4611 mapped:5566 pagetables:427 bounce:0
> Feb  4 16:15:16 kernel: DMA free:3540kB min:68kB low:84kB high:100kB active:0kB inactive:0kB present:16256kB pages_scanned:0 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 873 9636 9636
> Feb  4 16:15:16 kernel: Normal free:3692kB min:3744kB low:4680kB high:5616kB active:7584kB inactive:2960kB present:894080kB pages_scanned:20511 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 70104 70104
> Feb  4 16:15:16 kernel: HighMem free:7324192kB min:512kB low:9912kB high:19316kB active:87888kB inactive:39936kB present:8973312kB pages_scanned:0 all_unreclaimable? no
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 0 0
> Feb  4 16:15:16 kernel: DMA: 3*4kB 0*8kB 2*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3532kB
> Feb  4 16:15:16 kernel: Normal: 1*4kB 21*8kB 28*16kB 4*32kB 3*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3884kB
> Feb  4 16:15:16 kernel: HighMem: 3671*4kB 3883*8kB 3149*16kB 2519*32kB 1749*64kB 930*128kB 487*256kB 159*512kB 221*1024kB 146*2048kB 1510*4096kB = 7324068kB
> Feb  4 16:15:16 kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
> Feb  4 16:15:16 kernel: Free swap  = 16777208kB
> Feb  4 16:15:16 kernel: Total swap = 16777208kB
> Feb  4 16:15:16 kernel: Free swap:       16777208kB
> Feb  4 16:15:16 kernel:  [<c011cdb9>] do_fork+0x9a/0x17a
> Feb  4 16:15:16 kernel:  [<c0100cb5>] sys_clone+0x36/0x3b
> Feb  4 16:15:16 kernel:  [<c010285a>] sysenter_past_esp+0x5f/0x85
> Feb  4 16:15:16 kernel:  =======================
> Feb  4 16:15:16 kernel: Mem-info:
> Feb  4 16:15:16 kernel: DMA per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: Normal per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  25   Cold: hi:   62, btch:  15 usd:  55
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd:  28   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  31   Cold: hi:   62, btch:  15 usd:  57
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd:  36   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: HighMem per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  74   Cold: hi:   62, btch:  15 usd:   6
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd: 144   Cold: hi:   62, btch:  15 usd:  13
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  90   Cold: hi:   62, btch:  15 usd:  10
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd: 132   Cold: hi:   62, btch:  15 usd:  12
> Feb  4 16:15:16 kernel: Active:23868 inactive:10724 dirty:2 writeback:0 unstable:0
> Feb  4 16:15:16 kernel:  free:1832856 slab:4611 mapped:5566 pagetables:427 bounce:0
> Feb  4 16:15:16 kernel: DMA free:3540kB min:68kB low:84kB high:100kB active:0kB inactive:0kB present:16256kB pages_scanned:0 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 873 9636 9636
> Feb  4 16:15:16 kernel: Normal free:3692kB min:3744kB low:4680kB high:5616kB active:7584kB inactive:2960kB present:894080kB pages_scanned:20511 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 70104 70104
> Feb  4 16:15:16 kernel: HighMem free:7324192kB min:512kB low:9912kB high:19316kB active:87888kB inactive:39936kB present:8973312kB pages_scanned:0 all_unreclaimable? no
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 0 0
> Feb  4 16:15:16 kernel: DMA: 3*4kB 0*8kB 2*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3532kB
> Feb  4 16:15:16 kernel: Normal: 1*4kB 21*8kB 28*16kB 4*32kB 3*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3884kB
> Feb  4 16:15:16 kernel: HighMem: 3671*4kB 3883*8kB 3149*16kB 2519*32kB 1749*64kB 930*128kB 487*256kB 159*512kB 221*1024kB 146*2048kB 1510*4096kB = 7324068kB
> Feb  4 16:15:16 kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
> Feb  4 16:15:16 kernel: Free swap  = 16777208kB
> Feb  4 16:15:16 kernel: Total swap = 16777208kB
> Feb  4 16:15:16 kernel: Free swap:       16777208kB
> Feb  4 16:15:16 kernel: 2490368 pages of RAM
> Feb  4 16:15:16 kernel: 2260992 pages of HIGHMEM
> Feb  4 16:15:16 kernel: 415332 reserved pages
> Feb  4 16:15:16 kernel: 24136 pages shared
> Feb  4 16:15:16 kernel: 0 pages swap cached
> Feb  4 16:15:16 kernel: 2 pages dirty
> Feb  4 16:15:16 kernel: 0 pages writeback
> Feb  4 16:15:16 kernel: 5566 pages mapped
> Feb  4 16:15:16 kernel: 4611 pages slab
> Feb  4 16:15:16 kernel: 427 pages pagetables
> 
> Feb  4 16:15:16 kernel: Out of memory: kill process 2933 (sh) score 32755 or a child
> Feb  4 16:15:16 kernel: Killed process 2934 (java)
> Feb  4 16:15:16 kernel: 2490368 pages of RAM
> Feb  4 16:15:16 kernel: 2260992 pages of HIGHMEM
> Feb  4 16:15:16 kernel: 415332 reserved pages
> Feb  4 16:15:16 kernel: 24136 pages shared
> Feb  4 16:15:16 kernel: 0 pages swap cached
> Feb  4 16:15:16 kernel: 2 pages dirty
> Feb  4 16:15:16 kernel: 0 pages writeback
> Feb  4 16:15:16 kernel: 5566 pages mapped
> Feb  4 16:15:16 kernel: 4611 pages slab
> Feb  4 16:15:16 kernel: 427 pages pagetables
> 
> Feb  4 16:15:16 kernel: Out of memory: kill process 13047 (slapd) score 8193 or a child
> Feb  4 16:15:16 kernel: Killed process 13047 (slapd)
> Feb  4 16:15:16 kernel: df_inode invoked oom-killer: gfp_mask=0xd0, order=0, oomkilladj=0
> Feb  4 16:15:16 kernel:  [<c01408cb>] out_of_memory+0x69/0x18e
> Feb  4 16:15:16 kernel:  [<c0141eca>] __alloc_pages+0x1fc/0x283
> Feb  4 16:15:16 kernel:  [<c0141f8a>] __get_free_pages+0x39/0x47
> Feb  4 16:15:16 kernel:  [<c011bbc8>] copy_process+0x89/0x1051
> Feb  4 16:15:16 kernel:  [<c011cdb9>] do_fork+0x9a/0x17a
> Feb  4 16:15:16 kernel:  [<c0100cb5>] sys_clone+0x36/0x3b
> Feb  4 16:15:16 kernel:  [<c010285a>] sysenter_past_esp+0x5f/0x85
> Feb  4 16:15:16 kernel:  =======================
> Feb  4 16:15:16 kernel: Mem-info:
> Feb  4 16:15:16 kernel: DMA per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:15:16 kernel: Normal per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  25   Cold: hi:   62, btch:  15 usd:  55
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd:  28   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  33   Cold: hi:   62, btch:  15 usd:  57
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd:  36   Cold: hi:   62, btch:  15 usd:  52
> Feb  4 16:15:16 kernel: HighMem per-cpu:
> Feb  4 16:15:16 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  74   Cold: hi:   62, btch:  15 usd:   6
> Feb  4 16:15:16 kernel: CPU    1: Hot: hi:  186, btch:  31 usd: 144   Cold: hi:   62, btch:  15 usd:  13
> Feb  4 16:15:16 kernel: CPU    2: Hot: hi:  186, btch:  31 usd: 179   Cold: hi:   62, btch:  15 usd:  10
> Feb  4 16:15:16 kernel: CPU    3: Hot: hi:  186, btch:  31 usd: 132   Cold: hi:   62, btch:  15 usd:  12
> Feb  4 16:15:16 kernel: Active:23211 inactive:10724 dirty:2 writeback:0 unstable:0
> Feb  4 16:15:16 kernel:  free:1833444 slab:4611 mapped:5201 pagetables:427 bounce:0
> Feb  4 16:15:16 kernel: DMA free:3540kB min:68kB low:84kB high:100kB active:0kB inactive:0kB present:16256kB pages_scanned:0 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 873 9636 9636
> Feb  4 16:15:16 kernel: Normal free:3692kB min:3744kB low:4680kB high:5616kB active:7584kB inactive:2960kB present:894080kB pages_scanned:20511 all_unreclaimable? yes
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 70104 70104
> Feb  4 16:15:16 kernel: HighMem free:7326544kB min:512kB low:9912kB high:19316kB active:85260kB inactive:39936kB present:8973312kB pages_scanned:0 all_unreclaimable? no
> Feb  4 16:15:16 kernel: lowmem_reserve[]: 0 0 0 0
> Feb  4 16:15:16 kernel: DMA: 3*4kB 0*8kB 2*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3532kB
> Feb  4 16:15:16 kernel: Normal: 1*4kB 21*8kB 28*16kB 4*32kB 3*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3884kB
> Feb  4 16:15:16 kernel: HighMem: 3864*4kB 3907*8kB 3148*16kB 2503*32kB 1737*64kB 939*128kB 489*256kB 159*512kB 220*1024kB 147*2048kB 1510*4096kB = 7326424kB
> Feb  4 16:15:16 kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
> Feb  4 16:15:16 kernel: Free swap  = 16777208kB
> Feb  4 16:15:16 kernel: Total swap = 16777208kB
> Feb  4 16:15:16 kernel: Free swap:       16777208kB
> 
> SysRQ+m shows:
> 
> Feb  4 16:35:56 kernel: SysRq : Show Memory
> Feb  4 16:35:56 kernel: Mem-info:
> Feb  4 16:35:56 kernel: DMA per-cpu:
> Feb  4 16:35:56 kernel: CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:35:56 kernel: CPU    1: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0                                                                                  Feb  4 16:35:56 kernel: CPU    2: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0                                                                                  Feb  4 16:35:56 kernel: CPU    3: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
> Feb  4 16:35:56 kernel: Normal per-cpu:
> Feb  4 16:35:56 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:  26   Cold: hi:   62, btch:  15 usd:  51
> Feb  4 16:35:56 kernel: CPU    1: Hot: hi:  186, btch:  31 usd:  10   Cold: hi:   62, btch:  15 usd:  47
> Feb  4 16:35:56 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  25   Cold: hi:   62, btch:  15 usd:  50
> Feb  4 16:35:56 kernel: CPU    3: Hot: hi:  186, btch:  31 usd:   7   Cold: hi:   62, btch:  15 usd:  59
> Feb  4 16:35:56 kernel: HighMem per-cpu:
> Feb  4 16:35:56 kernel: CPU    0: Hot: hi:  186, btch:  31 usd:   6   Cold: hi:   62, btch:  15 usd:   6
> Feb  4 16:35:56 kernel: CPU    1: Hot: hi:  186, btch:  31 usd:  15   Cold: hi:   62, btch:  15 usd:  14
> Feb  4 16:35:56 kernel: CPU    2: Hot: hi:  186, btch:  31 usd:  98   Cold: hi:   62, btch:  15 usd:   4
> Feb  4 16:35:56 kernel: CPU    3: Hot: hi:  186, btch:  31 usd:  47   Cold: hi:   62, btch:  15 usd:   3
> Feb  4 16:35:56 kernel: Active:13145 inactive:7163 dirty:0 writeback:0 unstable:0
> Feb  4 16:35:56 kernel:  free:1847537 slab:4426 mapped:3787 pagetables:360 bounce:0
> Feb  4 16:35:56 kernel: DMA free:3560kB min:68kB low:84kB high:100kB active:8kB inactive:0kB present:16256kB pages_scanned:108 all_unreclaimable? yes
> Feb  4 16:35:56 kernel: lowmem_reserve[]: 0 873 9636 9636
> Feb  4 16:35:56 kernel: Normal free:3980kB min:3744kB low:4680kB high:5616kB active:5396kB inactive:5008kB present:894080kB pages_scanned:20561 all_unreclaimable? yes
> Feb  4 16:35:56 kernel: lowmem_reserve[]: 0 0 70104 70104
> Feb  4 16:35:56 kernel: HighMem free:7382608kB min:512kB low:9912kB high:19316kB active:47176kB inactive:23644kB present:8973312kB pages_scanned:0 all_unreclaimable? no
> Feb  4 16:35:56 kernel: lowmem_reserve[]: 0 0 0 0
> Feb  4 16:35:56 kernel: DMA: 2*4kB 4*8kB 2*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3560kB
> Feb  4 16:35:56 kernel: Normal: 75*4kB 10*8kB 21*16kB 4*32kB 3*64kB 1*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3980kB
> Feb  4 16:35:56 kernel: HighMem: 1036*4kB 2516*8kB 1914*16kB 1571*32kB 1176*64kB 785*128kB 533*256kB 336*512kB 230*1024kB 148*2048kB 1527*4096kB = 7382608kB
> Feb  4 16:35:56 kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
> Feb  4 16:35:56 kernel: Free swap  = 16777208kB
> Feb  4 16:35:56 kernel: Total swap = 16777208kB
> Feb  4 16:35:56 kernel: Free swap:       16777208kB
> Feb  4 16:35:56 kernel: 2490368 pages of RAM
> Feb  4 16:35:56 kernel: 2260992 pages of HIGHMEM
> Feb  4 16:35:56 kernel: 415332 reserved pages
> Feb  4 16:35:56 kernel: 25392 pages shared
> Feb  4 16:35:56 kernel: 0 pages swap cached
> Feb  4 16:35:56 kernel: 0 pages dirty
> Feb  4 16:35:56 kernel: 0 pages writeback
> Feb  4 16:35:56 kernel: 3787 pages mapped
> Feb  4 16:35:56 kernel: 4426 pages slab
> Feb  4 16:35:56 kernel: 360 pages pagetables
> 

Looks like quicklists again. Can you try patching your kernel with the
following patch. It should be there in the next stable release.


commit 96990a4ae979df9e235d01097d6175759331e88c
Author: Christoph Lameter <clameter@....com>
Date:   Mon Jan 14 00:55:14 2008 -0800

    quicklists: Only consider memory that can be used with GFP_KERNEL
    
    Quicklists calculates the size of the quicklists based on the number of
    free pages.  This must be the number of free pages that can be allocated
    with GFP_KERNEL.  node_page_state() includes the pages in ZONE_HIGHMEM and
    ZONE_MOVABLE which may lead the quicklists to become too large causing OOM.
    
    Signed-off-by: Christoph Lameter <clameter@....com>
    Tested-by: Dhaval Giani <dhaval@...ux.vnet.ibm.com>
    Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>

diff --git a/mm/quicklist.c b/mm/quicklist.c
index ae8189c..3f703f7 100644
--- a/mm/quicklist.c
+++ b/mm/quicklist.c
@@ -26,9 +26,17 @@ DEFINE_PER_CPU(struct quicklist, quicklist)[CONFIG_NR_QUICK];
 static unsigned long max_pages(unsigned long min_pages)
 {
 	unsigned long node_free_pages, max;
+	struct zone *zones = NODE_DATA(numa_node_id())->node_zones;
+
+	node_free_pages =
+#ifdef CONFIG_ZONE_DMA
+		zone_page_state(&zones[ZONE_DMA], NR_FREE_PAGES) +
+#endif
+#ifdef CONFIG_ZONE_DMA32
+		zone_page_state(&zones[ZONE_DMA32], NR_FREE_PAGES) +
+#endif
+		zone_page_state(&zones[ZONE_NORMAL], NR_FREE_PAGES);
 
-	node_free_pages = node_page_state(numa_node_id(),
-			NR_FREE_PAGES);
 	max = node_free_pages / FRACTION_OF_NODE_MEM;
 	return max(max, min_pages);
 }

Thanks,
-- 
regards,
Dhaval
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