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    SubjectRe: v3.4-rc2 out-of-memory problems (was Re: 3.4-rc1 sticks-and-crashs)
    On Sun, Apr 8, 2012 at 7:50 PM, Andrew Morton <> wrote:
    > On Sun, 8 Apr 2012 19:42:31 -0700 Linus Torvalds <> wrote:
    >> > Apr __8 20:29:11 werner kernel: Normal free:44004kB min:44012kB low:55012kB
    >> > high:66016kB active_anon:0kB inactive_anon:0kB active_file:132kB
    >> > inactive_file:140kB unevictable:0kB isolated(anon):0kB isolated(file):0kB
    >> > present:885944kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB
    >> > slab_reclaimable:13068kB slab_unreclaimable:147784kB kernel_stack:628952kB
    >> > pagetables:0kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:1376
    >> > all_unreclaimable? yes
    > That's claiming that 600MB of ZONE_NORMAL is being used for kernel stacks.

    Well, that would certainly eat up memory that is hard to get back.

    Werner - if you can reproduce this, can you get a "ps axl" or similar
    when it starts happening? Or probably even long before, since it
    probably starts long long earlier.

    Or does anybody see anything that keeps thread counts raised so that
    "free_task()" doesn't get done. kernel/profoe.c does that
    "profile_handoff_task()" thing - but only oprofile and the android
    low-memory-killer logic seems to use it though. But that's exactly the
    kind of thing that Werner's "configure everything" might enable -

    What else would do this? I'd suspect the /proc code, but that grabs
    the mm_struct, and those particular changes were pre-3.3 anyway.

    Adding Oleg just in case he has any ideas about process code changes
    (or some usermodehelper thing that leaks processes, or whatever).


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