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    Subjectoom-killer: gfp_mask=0xd1 with 2.6.15.4 on EM64T [previously 2.6.12]
    Hi again

    Still on the same dual EM64T machine with a Tyan Tiger i7525 (S2672)
    motherboard and 4 GB RAM for which I reported 2.6.12 oom killings a few
    days ago:

    I upgraded to Ubuntu Dapper and installed its latest 2.6.15 kernel,
    which incorporates 2.6.15.4. Started with the original "binary"
    linux-image-2.6.15-16-amd64-xeon package,
    and got a few oom killings even without running the same large test
    programs as before. Then recompiled the kernel with
    CONFIG_PREEMPT_NONE, CONFIG_SCHED_SMT, no CONFIG_PREEMPT_BKL,
    and the dump_stack() call suggested by Andrew Morton for
    mm/oom_kill.c [in out_of_memory()].

    Repeated tests with Gaussian... and got oom-killer events similar to
    those found with 2.6.12. At
    http://jmce.artenumerica.org/en/tmp/linux-2.6.15-oom_killings/kern.log
    are the kernel messages from the killing of two Gaussian runs;
    I just show below the beginning, until the first killing.

    Any suggestions on patches or some pre-2.6.16 version I should try?


    Call Trace:<ffffffff8015efcb>{out_of_memory+23}
    <ffffffff80130465>{__wake_up+56}
    <ffffffff80161177>{__alloc_pages+572}
    <ffffffff8017fc25>{bio_copy_user+219}
    <ffffffff801debbf>{blk_rq_map_user+133} <ffffffff801e1b61>{sg_io+351}
    <ffffffff801e1ff8>{scsi_cmd_ioctl+494}
    <ffffffff80130465>{__wake_up+56}
    <ffffffff80265aac>{sock_def_readable+52}
    <ffffffff802c5d68>{unix_dgram_sendmsg+1085}
    <ffffffff88077e35>{:sd_mod:sd_ioctl+371}
    <ffffffff801e0058>{blkdev_driver_ioctl+93}
    <ffffffff801e0726>{blkdev_ioctl+1613}
    <ffffffff8018ce76>{do_select+1137}
    <ffffffff8026321e>{sys_sendto+251} <ffffffff8018c941>{__pollwait+0}
    <ffffffff801813d2>{block_ioctl+27} <ffffffff8018c091>{do_ioctl+33}
    <ffffffff8018c36c>{vfs_ioctl+643} <ffffffff8018c3e0>{sys_ioctl+91}
    <ffffffff8010fa46>{system_call+126}
    oom-killer: gfp_mask=0xd1, order=0
    Mem-info:
    DMA per-cpu:
    cpu 0 hot: low 0, high 0, batch 1 used:0
    cpu 0 cold: low 0, high 0, batch 1 used:0
    cpu 1 hot: low 0, high 0, batch 1 used:0
    cpu 1 cold: low 0, high 0, batch 1 used:0
    cpu 2 hot: low 0, high 0, batch 1 used:0
    cpu 2 cold: low 0, high 0, batch 1 used:0
    cpu 3 hot: low 0, high 0, batch 1 used:0
    cpu 3 cold: low 0, high 0, batch 1 used:0
    DMA32 per-cpu:
    cpu 0 hot: low 0, high 186, batch 31 used:151
    cpu 0 cold: low 0, high 62, batch 15 used:50
    cpu 1 hot: low 0, high 186, batch 31 used:165
    cpu 1 cold: low 0, high 62, batch 15 used:56
    cpu 2 hot: low 0, high 186, batch 31 used:5
    cpu 2 cold: low 0, high 62, batch 15 used:54
    cpu 3 hot: low 0, high 186, batch 31 used:12
    cpu 3 cold: low 0, high 62, batch 15 used:2
    Normal per-cpu:
    cpu 0 hot: low 0, high 186, batch 31 used:118
    cpu 0 cold: low 0, high 62, batch 15 used:56
    cpu 1 hot: low 0, high 186, batch 31 used:82
    cpu 1 cold: low 0, high 62, batch 15 used:59
    cpu 2 hot: low 0, high 186, batch 31 used:30
    cpu 2 cold: low 0, high 62, batch 15 used:53
    cpu 3 hot: low 0, high 186, batch 31 used:10
    cpu 3 cold: low 0, high 62, batch 15 used:14
    HighMem per-cpu: empty
    Free pages: 14924kB (0kB HighMem)
    Active:491535 inactive:494210 dirty:148758 writeback:0 unstable:0
    free:3731 slab:13610 mapped:483530 pagetables:1658
    DMA free:20kB min:24kB low:28kB high:36kB active:0kB inactive:0kB
    present:12464kB pages_scanned:2 all_unreclaimable? yes
    lowmem_reserve[]: 0 3255 4013 4013
    DMA32 free:12752kB min:6564kB low:8204kB high:9844kB active:1475208kB
    inactive:1723432kB present:3333792kB pages_scanned:66 all_unreclaimable? no
    lowmem_reserve[]: 0 0 757 757
    Normal free:2152kB min:1528kB low:1908kB high:2292kB active:490804kB
    inactive:253408kB present:775680kB 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: 1*4kB 0*8kB 1*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB
    0*2048kB 0*4096kB = 20kB
    DMA32: 28*4kB 27*8kB 20*16kB 20*32kB 33*64kB 2*128kB 0*256kB 0*512kB
    1*1024kB 0*2048kB 2*4096kB = 12872kB
    Normal: 16*4kB 9*8kB 14*16kB 0*32kB 6*64kB 1*128kB 1*256kB 0*512kB
    1*1024kB 0*2048kB 0*4096kB = 2152kB
    HighMem: empty
    Swap cache: add 79, delete 77, find 7/11, race 0+0
    Free swap = 3517888kB
    Total swap = 3518152kB
    Free swap: 3517888kB
    1245184 pages of RAM
    232833 reserved pages
    219286 pages shared
    2 pages swap cached
    Out of Memory: Killed process 13792 (l502.exe).


    Best regards
    J Esteves

    --
    +351 939838775 Skype:jmcerqueira http://del.icio.us/jmce
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