[maemo-developers] Did Nokia alter kernel's OOM handling for the 770?

[From: Clemens Eisserer]

Hi,

I am using my Nokia-770 as allround-server running
postgres+tor+routing+lighthttp.
It works quite great (except the broken wlan-driver causing crashes
all few days when running a tor-relay).
However from time to time the OOM killer kicks in, although there's
plenty RAM and swap available.

Any idea whats causing the kernel to go mad?
Was it altered intentionally (if so, what was changes so that I can
revert it), or is it a bug somewhere?

Thank you in advance, Clemens

[17676.783874] oom-killer: gfp_mask=0x201d2, order=0
[17676.797241] [<c0026890>] (dump_stack+0x0/0x14) from [<c0071850>]
(out_of_memory+0x40/0x1d8)
[17676.797393] [<c0071810>] (out_of_memory+0x0/0x1d8) from
[<c0072d50>] (__alloc_pages+0x240/0x2c4)
[17676.797515] [<c0072b10>] (__alloc_pages+0x0/0x2c4) from
[<c0075648>] (__do_page_cache_readahead+0x150/0x324)
[17676.797637] [<c00754f8>] (__do_page_cache_readahead+0x0/0x324) from
[<c0075914>] (do_page_cache_readahead+0x64/0x70)
[17676.797760] [<c00758b0>] (do_page_cache_readahead+0x0/0x70) from
[<c006eba0>] (filemap_nopage+0x190/0x3ec)
[17676.797943]  r7 = 00000000  r6 = 00219560  r5 = 00000000  r4 =
C25E0000
[17676.798004] [<c006ea10>] (filemap_nopage+0x0/0x3ec) from
[<c007cc04>] (__handle_mm_fault+0x2fc/0x96c)
[17676.798126] [<c007c908>] (__handle_mm_fault+0x0/0x96c) from
[<c0029364>] (do_page_fault+0xe4/0x214)
[17676.798248] [<c0029280>] (do_page_fault+0x0/0x214) from
[<c00295e0>] (do_DataAbort+0x3c/0xa4)
[17676.798339] [<c00295a4>] (do_DataAbort+0x0/0xa4) from [<c0020da8>]
(ret_from_exception+0x0/0x10)
[17676.798461]  r8 = 00000000  r7 = 40639540  r6 = 40639560  r5 =
00000001
[17676.798553]  r4 = FFFFFFFF
[17676.798583] Mem-info:
[17676.798614] DMA per-cpu:
[17676.798675] cpu 0 hot: high 18, batch 3 used:2
[17676.798706] cpu 0 cold: high 6, batch 1 used:0
[17676.798767] DMA32 per-cpu: empty
[17676.798797] Normal per-cpu: empty
[17676.798828] HighMem per-cpu: empty
[17676.798950] Free pages:        1172kB (0kB HighMem)
[17676.799011] Active:5576 inactive:6815 dirty:0 writeback:231
unstable:0 free:293 slab:1257 mapped:12129 pagetables:374
[17676.799133] DMA free:1172kB min:1024kB low:1280kB high:1536kB
active:22304kB inactive:27260kB present:65536kB pages_scanned:91
all_unreclaimable? no
[17676.799224] lowmem_reserve[]: 0 0 0 0
[17676.799285] DMA32 free:0kB min:0kB low:0kB high:0kB active:0kB
inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
[17676.799377] lowmem_reserve[]: 0 0 0 0
[17676.799468] Normal free:0kB min:0kB low:0kB high:0kB active:0kB
inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
[17676.799530] lowmem_reserve[]: 0 0 0 0
[17676.799621] HighMem free:0kB min:128kB low:128kB high:128kB
active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable?
no
[17676.799682] lowmem_reserve[]: 0 0 0 0
[17676.799743] DMA: 33*4kB 4*8kB 1*16kB 1*32kB 1*64kB 1*128kB 1*256kB
1*512kB 0*1024kB 0*2048kB 0*4096kB = 1172kB
[17676.799896] DMA32: empty
[17676.799926] Normal: empty
[17676.799957] HighMem: empty
[17676.800018] Swap cache: add 12847, delete 11756, find 42323/43010, race 0+0
[17676.800079] Free swap  = 167716kB
[17676.800109] Total swap = 198272kB
[17676.800170] Free swap:       167716kB
[17676.804534] 16384 pages of RAM
[17676.804565] 638 free pages
[17676.804595] 1096 reserved pages
[17676.804626] 1257 slab pages
[17676.804656] 19580 pages shared
[17676.804718] 1091 pages swap cached
[17676.805267] Out of Memory: Kill process 1535 (postgres) score 11478
and children.
[17676.805358] Out of memory: Killed process 1537 (postgres).