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    SubjectRe: Found the commit that causes the OOMs
    Date
    KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> wrote:

    > David, Can you please try to following patch? it was posted to LKML
    > about 1-2 week ago.
    >
    > Subject "[BUGFIX][PATCH] fix lumpy reclaim lru handiling at
    > isolate_lru_pages v2"

    It is already committed, but I ran a test on the latest Linus kernel anyway:

    msgctl11 invoked oom-killer: gfp_mask=0xd0, order=1, oom_adj=0
    msgctl11 cpuset=/ mems_allowed=0
    Pid: 20366, comm: msgctl11 Not tainted 2.6.31-rc1-cachefs #144
    Call Trace:
    [<ffffffff810718d2>] ? oom_kill_process.clone.0+0xa9/0x245
    [<ffffffff81071b99>] ? __out_of_memory+0x12b/0x142
    [<ffffffff81071c1a>] ? out_of_memory+0x6a/0x94
    [<ffffffff810742e4>] ? __alloc_pages_nodemask+0x42e/0x51d
    [<ffffffff81031416>] ? copy_process+0x95/0x114f
    [<ffffffff8107443c>] ? __get_free_pages+0x12/0x4f
    [<ffffffff81031439>] ? copy_process+0xb8/0x114f
    [<ffffffff8108192e>] ? handle_mm_fault+0x5dd/0x62f
    [<ffffffff8103260f>] ? do_fork+0x13f/0x2ba
    [<ffffffff81022c22>] ? do_page_fault+0x1f8/0x20d
    [<ffffffff8100b0d3>] ? stub_clone+0x13/0x20
    [<ffffffff8100ad6b>] ? system_call_fastpath+0x16/0x1b
    Mem-Info:
    DMA per-cpu:
    CPU 0: hi: 0, btch: 1 usd: 0
    CPU 1: hi: 0, btch: 1 usd: 0
    DMA32 per-cpu:
    CPU 0: hi: 186, btch: 31 usd: 159
    CPU 1: hi: 186, btch: 31 usd: 2
    Active_anon:70477 active_file:1 inactive_anon:4514
    inactive_file:7 unevictable:0 dirty:0 writeback:0 unstable:0
    free:1954 slab:42078 mapped:237 pagetables:57791 bounce:0
    DMA free:3932kB min:60kB low:72kB high:88kB active_anon:236kB inactive_anon:0kB active_file:4kB inactive_file:4kB unevictable:0kB present:15364kB pages_scanned:0 all_unreclaimable? no
    lowmem_reserve[]: 0 968 968 968
    DMA32 free:3884kB min:3948kB low:4932kB high:5920kB active_anon:281672kB inactive_anon:18056kB active_file:0kB inactive_file:24kB unevictable:0kB present:992032kB pages_scanned:6 all_unreclaimable? no
    lowmem_reserve[]: 0 0 0 0
    DMA: 180*4kB 36*8kB 3*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3936kB
    DMA32: 491*4kB 0*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 3884kB
    1808 total pagecache pages
    0 pages in swap cache
    Swap cache stats: add 0, delete 0, find 0/0
    Free swap = 0kB
    Total swap = 0kB
    255744 pages RAM
    5589 pages reserved
    249340 pages shared
    219039 pages non-shared
    Out of memory: kill process 11471 (msgctl11) score 112393 or a child
    Killed process 12318 (msgctl11)


    David


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