oom-killer: gfp_mask=0x201d2, order=0
 [<c0144507>] out_of_memory+0x25/0x13a
 [<c0145970>] __alloc_pages+0x1f5/0x275
 [<c0146b1f>] __do_page_cache_readahead+0xc8/0x1e8
 [<e08bc97d>] dm_any_congested+0x2f/0x35 [dm_mod]
 [<c0143c19>] filemap_nopage+0x15b/0x312
 [<c014c0dc>] __handle_mm_fault+0x26e/0x740
 [<c01036b6>] common_interrupt+0x1a/0x20
 [<c011542e>] do_page_fault+0x18a/0x481
 [<c01152a4>] do_page_fault+0x0/0x481
 [<c01037f9>] error_code+0x39/0x40
Mem-info:
DMA per-cpu:
cpu 0 hot: high 0, batch 1 used:0
cpu 0 cold: high 0, batch 1 used:0
DMA32 per-cpu: empty
Normal per-cpu:
cpu 0 hot: high 186, batch 31 used:147
cpu 0 cold: high 62, batch 15 used:52
HighMem per-cpu: empty
Free pages:        5308kB (0kB HighMem)
Active:59902 inactive:60900 dirty:0 writeback:370 unstable:0 free:1327 slab:3560 mapped:24 pagetables:1189
DMA free:2068kB min:88kB low:108kB high:132kB active:5508kB inactive:5356kB present:16384kB pages_scanned:12025 all_unreclaimable? yes
lowmem_reserve[]: 0 0 495 495
DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 495 495
Normal free:3240kB min:2800kB low:3500kB high:4200kB active:234100kB inactive:238244kB present:506880kB pages_scanned:21401 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
lowmem_reserve[]: 0 0 0 0
DMA: 1*4kB 2*8kB 0*16kB 2*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 2068kB
DMA32: empty
Normal: 118*4kB 10*8kB 8*16kB 10*32kB 5*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 3240kB
HighMem: empty
Swap cache: add 1340387, delete 1340012, find 47256821/47297711, race 0+298
Free swap  = 0kB
Total swap = 1544184kB
Free swap:            0kB
130816 pages of RAM
0 pages of HIGHMEM
1886 reserved pages
671 pages shared
375 pages swap cached
0 pages dirty
370 pages writeback
24 pages mapped
3560 pages slab
1189 pages pagetables
Out of Memory: Kill process 8609 (screen) score 2470 and children.
Out of memory: Killed process 8609 (screen).

結構日常でおこるので悲しい…。i815/Cele1.3GHz な子なので、512MB以上つめないんだよね...
メモリ以外のスペックは十分なんだけど。。