Messages in this thread | | | From | Rob Landley <> | Subject | Re: echo 0 > /proc/sys/vm/swappiness triggers OOM killer under 2.6.14. | Date | Tue, 1 Nov 2005 02:37:01 -0600 |
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On Monday 31 October 2005 22:05, Robert Hancock wrote: > Rob Landley wrote: > > Under 2.6.14 (UML), I have a workload that runs with 64 megs ram and 256 > > megs swap space. It completes (albeit swapping like mad) with swappiness > > at the default 60, but if I set it to 0 the OOM killer kicks in and the > > script aborts. > > You should get some debugging output in dmesg when the OOM killer kicks > in, can you post this?
Sure:
VFS: Mounted root (hostfs filesystem). Adding 262136k swap on tmp/ubda. Priority:-1 extents:1 across:262136k oom-killer: gfp_mask=0x400d2, order=0 Mem-info: DMA per-cpu: cpu 0 hot: low 14, high 42, batch 7 used:20 cpu 0 cold: low 0, high 14, batch 7 used:8 Normal per-cpu: empty HighMem per-cpu: empty Free pages: 1416kB (0kB HighMem) Active:14014 inactive:718 dirty:1 writeback:0 unstable:0 free:354 slab:468 mapped:14722 pagetables:58 DMA free:1416kB min:1024kB low:1280kB high:1536kB active:56056kB inactive:2872kB present:65536kB pages_scanned:26577 all_unreclaimable? no lowmem_reserve[]: 0 0 0 Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no lowmem_reserve[]: 0 0 0 HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no lowmem_reserve[]: 0 0 0 DMA: 98*4kB 0*8kB 0*16kB 0*32kB 4*64kB 2*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB 0*4096kB = 1416kB Normal: empty HighMem: empty Swap cache: add 5689, delete 5485, find 583/725, race 0+0 Free swap = 255420kB Total swap = 262136kB Free swap: 255420kB 16384 pages of RAM 0 pages of HIGHMEM 671 reserved pages 1034 pages shared 204 pages swap cached Out of Memory: Killed process 30055 (cc1). Badness in handle_page_fault at /home/landley/newbuild/firmware-build/tmpdir/linux-2.6.14/arch/um/kernel/trap_kern.c:98 08bafb10: [<0805d064>] handle_page_fault+0x1c4/0x260 08bafb50: [<0805d1a7>] segv+0xa7/0x2e0 08bafb70: [<0805e713>] setjmp_wrapper+0x83/0x90 08bafba8: [<0805e6c7>] setjmp_wrapper+0x37/0x90 08bafbd0: [<0805b1a5>] change_signals+0x65/0x90 08bafbe0: [<08060d3a>] do_ops+0x14a/0x150 08bafc10: [<0805f29f>] wait_stub_done+0x5f/0x110 08bafc40: [<0805d67c>] segv_handler+0x7c/0x90 08bafc60: [<08060fbe>] user_signal+0x3e/0x70 08bafc80: [<0805faa0>] userspace+0x180/0x220 08bafcf0: [<08060711>] fork_handler+0xc1/0xe0
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