From dmesg:

<4>sh invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>klogd invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2799 inactive:2880 dirty:0 writeback:0 unstable:0 free:180 slab:704 mapped:3 pagetables:69
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11196kB inactive:11520kB present:32512kB pages_scanned:36181 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 4*4kB 4*8kB 0*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 35167, delete 35151, find 3349/8585, race 0+5
<4>Free swap  = 462560kB
<4>Total swap = 465876kB
<4>Free swap:       462560kB
<4>8192 pages of RAM
<4>292 free pages
<4>626 reserved pages
<4>704 slab pages
<4>5516 pages shared
<4>16 pages swap cached
<3>Out of memory: kill process 857 (portmap) score 356 or a child
<3>Killed process 857 (portmap)
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>klogd invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2807 inactive:2880 dirty:0 writeback:0 unstable:0 free:172 slab:704 mapped:3 pagetables:69
<4>DMA free:688kB min:720kB low:900kB high:1080kB active:11228kB inactive:11520kB present:32512kB pages_scanned:36181 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 2*8kB 0*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 688kB
<4>Swap cache: add 35178, delete 35155, find 3349/8587, race 0+5
<4>Free swap  = 462628kB
<4>Total swap = 465876kB
<4>Free swap:       462628kB
<4>8192 pages of RAM
<4>289 free pages
<4>626 reserved pages
<4>704 slab pages
<4>5516 pages shared
<4>23 pages swap cached
<3>Out of memory: kill process 913 (smbd) score 167 or a child
<3>Killed process 920 (smbd)
<4>Active:2851 inactive:2835 dirty:0 writeback:0 unstable:0 free:180 slab:704 mapped:3 pagetables:66
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11472kB inactive:11272kB present:32512kB pages_scanned:322 all_unreclaimable? no
<4>lowmem_reserve[]: 0 0
<4>DMA: 4*4kB 2*8kB 1*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 35178, delete 35155, find 3349/8587, race 0+5
<4>Free swap  = 462740kB
<4>Total swap = 465876kB
<4>Free swap:       462740kB
<4>8192 pages of RAM
<4>289 free pages
<4>626 reserved pages
<4>704 slab pages
<4>5516 pages shared
<4>29 pages swap cached
<3>Out of memory: kill process 913 (smbd) score 125 or a child
<3>Killed process 1259 (smbd)
<4>klogd invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2802 inactive:2875 dirty:0 writeback:0 unstable:0 free:207 slab:707 mapped:8 pagetables:59
<4>DMA free:828kB min:720kB low:900kB high:1080kB active:11208kB inactive:11500kB present:32512kB pages_scanned:35231 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 27*4kB 2*8kB 2*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB <4>sh invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2811 inactive:2876 dirty:0 writeback:0 unstable:0 free:180 slab:707 mapped:9 pagetables:59
<4>= 828kB
<4>Swap cache: add 124516, delete 124472, find 10420/29306, race 1+15
<4>Free swap  = 462592kB
<4>Total swap = 465876kB
<4>Free swap:       462592kB
<4>8192 pages of RAM
<4>284 free pages
<4>626 reserved pages
<4>707 slab pages
<4>5523 pages shared
<4>44 pages swap cached
<3>Out of memory: kill process 913 (smbd) score 83 or a child
<3>Killed process 913 (smbd)
<4>DMA free:740kB min:720kB low:900kB high:1080kB active:11372kB inactive:11392kB present:32512kB pages_scanned:100 all_unreclaimable? no
<4>lowmem_reserve[]: 0 0
<4>DMA: 1*4kB 2*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 740kB
<4>Swap cache: add 124520, delete 124472, find 10420/29307, race 1+15
<4>Free swap  = 463064kB
<4>Total swap = 465876kB
<4>Free swap:       463064kB
<4>8192 pages of RAM
<4>281 free pages
<4>626 reserved pages
<4>707 slab pages
<4>5525 pages shared
<4>48 pages swap cached
<3>Out of memory: kill process 1223 (sh) score 77 or a child
<3>Killed process 1233 (tar)
<4>init invoked oom-killer: gfp_mask=0x200d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2855 inactive:2781 dirty:0 writeback:0 unstable:0 free:228 slab:700 mapped:2 pagetables:54
<4>DMA free:912kB min:720kB low:900kB high:1080kB active:11420kB inactive:11124kB present:32512kB pages_scanned:37463 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 48*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 912kB
<4>Swap cache: add 155992, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>317 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5517 pages shared
<4>18 pages swap cached
<3>Out of memory: kill process 1263 (swapoff) score -1 or a child
<3>Killed process 1263 (swapoff)
<4>sh invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>klogd invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2826 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:8 pagetables:54
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2826 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11304kB present:32512kB pages_scanned:37463 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5523 pages shared
<4>23 pages swap cached
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2826 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11304kB present:32512kB pages_scanned:37463 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5523 pages shared
<4>23 pages swap cached
<4>Active:2861 inactive:2826 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2826 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11304kB present:32512kB pages_scanned:37463 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5523 pages shared
<4>23 pages swap cached
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
ee
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2827 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>23 pages swap cached
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB <4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2827 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>23 pages swap cached
<4>0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2827 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>23 pages swap cached
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>ntpdate invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
<4>Mem-info:
<4>DMA per-cpu:
<4>CPU    0: Hot: hi:    0, btch:   1 usd:   0   Cold: hi:    0, btch:   1 usd:   0
<4>Active:2861 inactive:2827 dirty:0 writeback:0 unstable:0 free:180 slab:700 mapped:9 pagetables:54
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155974, find 13098/37973, race 1+18
<4>Free swap  = 4294964748kB
<4>Total swap = 0kB
<4>Free swap:        -2548kB
<4>8192 pages of RAM
<4>280 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>23 pages swap cached
<4>DMA free:720kB min:720kB low:900kB high:1080kB active:11444kB inactive:11308kB present:32512kB pages_scanned:37527 all_unreclaimable? yes
<4>lowmem_reserve[]: 0 0
<4>DMA: 0*4kB 0*8kB 3*16kB 1*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 720kB
<4>Swap cache: add 155997, delete 155975, find 13098/37973, race 1+18
<4>Free swap  = 4294964752kB
<4>Total swap = 0kB
<4>Free swap:        -2544kB
<4>8192 pages of RAM
<4>282 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>23 pages swap cached
<3>Out of memory: kill process 879 (dropbear) score 66 or a child
<3>Killed process 933 (dropbear)
<4>8192 pages of RAM
<4>269 free pages
<4>626 reserved pages
<4>700 slab pages
<4>5522 pages shared
<4>31 pages swap cached
<3>Out of memory: kill process 1223 (sh) score 60 or a child
<3>Killed process 1234 (sh)

root@slug2:/media/sdb3# free
             total       used       free     shared    buffers     cached
Mem:         30336      29592        744          0      22048       1112
-/+ buffers/cache:       6432      23904
Swap:       465876       1472     464404
root@slug2:/media/sdb3#