lkml.org 
[lkml]   [2004]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.6.9-rc2-mm4 ps hang ?
    Andrew Morton wrote:
    > Badari Pulavarty <pbadari@us.ibm.com> wrote:
    >
    >>Here is the full sysrq-t output.
    >
    >
    > What's this guy up to?
    >
    > db2fmcd D 0000000000000000 0 11032 1 1373 11031 (NOTLB)
    > 00000101b9b9bef8 0000000000000002 0000003700000037 00000101c13608a0
    > 000000010000009f 0000010199649250 0000010199649588 0000000000000000
    > 0000000000000206 ffffffff801353db
    > Call Trace:<ffffffff801353db>{try_to_wake_up+971} <ffffffff80445570>{__down_write+128}
    > <ffffffff80125e7f>{sys32_mmap+143} <ffffffff80124b01>{ia32_sysret+0}
    >
    >
    > Something is seriously screwed up if it's stuck in try_to_wake_up(). Tried
    > generating a few extra traces?
    >
    > Then again, maybe we're missing an up_read() somewhere. hrm, I'll check.

    It's highly^64 unlikely BUT a possible reason for a task getting stuck
    in try_to_wakeup() is the function adjust_sched_timestamp() which is
    part of the ZAPHOD patch. This could be tested by removing the if-while
    statement from that function and seeing if that fixes things. Or you
    could just remove the call from try_to_wake_up().

    I'll use a more sensible (bounded) mechanism in the next version of ZAPHOD.

    Peter
    --
    Peter Williams pwil3058@bigpond.net.au

    "Learning, n. The kind of ignorance distinguishing the studious."
    -- Ambrose Bierce
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 14:06    [W:0.022 / U:0.752 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site