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    Subjectswapping and oom-killer: gfp_mask=0x201d2, order=0
    Date

    The current mm behaviour in 2.6, during physical memory exhaustion, expresses
    itself as an oom-killing spree, while the kernel could have resorted to
    swapping.

    Is there a reason why oom-killing is currently preferred over swapping?

    Thanks!

    --
    Al

    ---
    oom-killer: gfp_mask=0x201d2, order=0
    [<c0463e40>] pci_claim_resource+0x20/0xd0
    [<c013ff25>] out_of_memory+0xa5/0xc0
    [<c0141099>] __alloc_pages+0x279/0x310
    [<c0143669>] __do_page_cache_readahead+0xe9/0x120
    [<c0143b3f>] max_sane_readahead+0x2f/0x50
    [<c0463eac>] pci_claim_resource+0x8c/0xd0
    [<c013d8cb>] filemap_nopage+0x2eb/0x370
    [<c0149ea5>] do_no_page+0x65/0x220
    [<c0463f18>] pdev_sort_resources+0x28/0x100
    [<c014a1dc>] __handle_mm_fault+0xec/0x200
    [<c0113258>] do_page_fault+0x188/0x5c5
    [<c0463fbc>] pdev_sort_resources+0xcc/0x100
    [<c0463fbc>] pdev_sort_resources+0xcc/0x100
    [<c0463fbc>] pdev_sort_resources+0xcc/0x100
    [<c01130d0>] do_page_fault+0x0/0x5c5
    [<c0103a0f>] error_code+0x4f/0x54
    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: empty
    HighMem per-cpu: empty
    Free pages: 476kB (0kB HighMem)
    Active:96 inactive:126 dirty:0 writeback:0 unstable:0 free:119 slab:445
    mapped:186 pagetables:31
    DMA free:476kB min:360kB low:448kB high:540kB active:384kB inactive:504kB
    present:8192kB pages_scanned:257 all_unreclaimable? no
    lowmem_reserve[]: 0 0 0 0
    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 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 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: 23*4kB 4*8kB 0*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB
    0*2048kB 0*4096kB = 476kB
    DMA32: empty
    Normal: empty
    HighMem: empty
    Swap cache: add 11494, delete 11444, find 2453/5972, race 0+0
    Free swap = 1016696kB
    Total swap = 1020088kB
    Free swap: 1016696kB
    2048 pages of RAM
    0 pages of HIGHMEM
    1031 reserved pages
    209 pages shared
    50 pages swap cached
    0 pages dirty
    0 pages writeback
    186 pages mapped
    445 pages slab
    31 pages pagetables
    Out of Memory: Kill process 65 (bash) score 88 and children.
    Out of memory: Killed process 104 (mc).
    oom-killer: gfp_mask=0x201d2, order=0
    [<c044fe40>] gzip_mark+0x0/0x10
    [<c013ff25>] out_of_memory+0xa5/0xc0
    [<c0141099>] __alloc_pages+0x279/0x310
    [<c0143669>] __do_page_cache_readahead+0xe9/0x120
    [<c0143b3f>] max_sane_readahead+0x2f/0x50
    [<c044feac>] flush_window+0x4c/0x70
    [<c013d8cb>] filemap_nopage+0x2eb/0x370
    [<c0149ea5>] do_no_page+0x65/0x220
    [<c044ff18>] unpack_to_rootfs+0x48/0x200
    [<c014a1dc>] __handle_mm_fault+0xec/0x200
    [<c0113258>] do_page_fault+0x188/0x5c5
    [<c044ffbc>] unpack_to_rootfs+0xec/0x200
    [<c044ffbc>] unpack_to_rootfs+0xec/0x200
    [<c044e000>] do_name+0x150/0x1b0
    [<c044e000>] do_name+0x150/0x1b0
    [<c01130d0>] do_page_fault+0x0/0x5c5
    [<c0103a0f>] error_code+0x4f/0x54
    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: empty
    HighMem per-cpu: empty
    Free pages: 528kB (0kB HighMem)
    Active:177 inactive:73 dirty:0 writeback:0 unstable:0 free:132 slab:440
    mapped:213 pagetables:27
    DMA free:528kB min:360kB low:448kB high:540kB active:708kB inactive:292kB
    present:8192kB pages_scanned:0 all_unreclaimable? no
    lowmem_reserve[]: 0 0 0 0
    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 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 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: 40*4kB 2*8kB 0*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB
    0*2048kB 0*4096kB = 528kB
    DMA32: empty
    Normal: empty
    HighMem: empty
    Swap cache: add 13712, delete 13643, find 2842/7215, race 0+0
    Free swap = 1016948kB
    Total swap = 1020088kB
    Free swap: 1016948kB
    2048 pages of RAM
    0 pages of HIGHMEM
    1031 reserved pages
    213 pages shared
    69 pages swap cached
    0 pages dirty
    0 pages writeback
    213 pages mapped
    440 pages slab
    27 pages pagetables
    Out of Memory: Kill process 22 (bash) score 64 and children.
    Out of memory: Killed process 103 (top).
    oom-killer: gfp_mask=0x201d2, order=0
    [<c013ff25>] out_of_memory+0xa5/0xc0
    [<c0141099>] __alloc_pages+0x279/0x310
    [<c0143669>] __do_page_cache_readahead+0xe9/0x120
    [<c0143b3f>] max_sane_readahead+0x2f/0x50
    [<c013d8cb>] filemap_nopage+0x2eb/0x370
    [<c0149ea5>] do_no_page+0x65/0x220
    [<c014a1dc>] __handle_mm_fault+0xec/0x200
    [<c0113258>] do_page_fault+0x188/0x5c5
    [<c01130d0>] do_page_fault+0x0/0x5c5
    [<c0103a0f>] error_code+0x4f/0x54
    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: empty
    HighMem per-cpu: empty
    Free pages: 368kB (0kB HighMem)
    Active:18 inactive:261 dirty:0 writeback:0 unstable:0 free:92 slab:443
    mapped:246 pagetables:27
    DMA free:368kB min:360kB low:448kB high:540kB active:72kB inactive:1044kB
    present:8192kB pages_scanned:466 all_unreclaimable? no
    lowmem_reserve[]: 0 0 0 0
    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 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 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: 0*4kB 2*8kB 0*16kB 1*32kB 1*64kB 0*128kB 1*256kB 0*512kB 0*1024kB
    0*2048kB 0*4096kB = 368kB
    DMA32: empty
    Normal: empty
    HighMem: empty
    Swap cache: add 16443, delete 16334, find 3542/8819, race 0+0
    Free swap = 1016548kB
    Total swap = 1020088kB
    Free swap: 1016548kB
    2048 pages of RAM
    0 pages of HIGHMEM
    1031 reserved pages
    253 pages shared
    109 pages swap cached
    0 pages dirty
    0 pages writeback
    246 pages mapped
    443 pages slab
    27 pages pagetables
    Out of Memory: Kill process 108 (bash) score 74 and children.
    Out of memory: Killed process 144 (bash).
    ---
    -
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      Last update: 2006-05-11 14:19    [W:0.060 / U:0.224 seconds]
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