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    SubjectRe: [PATCH] Staircase scheduler v7.4
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    On Friday 25 June 2004 18:46, you wrote:
    > I haven't seen what is in -bk7 so I don't know if there's an issue with
    > applying it to that. Anything's possible, though. See if you can
    > reproduce it and isolate it to staircase or not and collect some more
    > info about what is happening with the task from top, vmstat and
    > /proc/$pid/status

    I just catched a stalled process:

    mb 11000 0.4 0.6 4604 3180 tty2 S 20:32 0:01 /bin/sh ./configure --enable-debug

    mb@lfs:/proc/11000> cat status
    Name: configure
    State: S (sleeping)
    Burst: 0
    Tgid: 11000
    Pid: 11000
    PPid: 1858
    TracerPid: 0
    Uid: 1000 1000 1000 1000
    Gid: 100 100 100 100
    FDSize: 256
    Groups: 9 10 100
    VmSize: 4604 kB
    VmLck: 0 kB
    VmRSS: 3180 kB
    VmData: 2356 kB
    VmStk: 132 kB
    VmExe: 572 kB
    VmLib: 1444 kB
    Threads: 1
    SigPnd: 0000000000000000
    ShdPnd: 0000000000000000
    SigBlk: 0000000000010000
    SigIgn: 8000000000000004
    SigCgt: 0000000043817efb
    CapInh: 0000000000000000
    CapPrm: 0000000000000000
    CapEff: 0000000000000000

    I don't know what the file wchan is good for, but here is
    it's output:
    mb@lfs:/proc/11000> cat wchan
    sys_wait4

    Seems it's killable by SIGKILL only.
    mb@lfs:/proc/11000> kill 11000
    mb@lfs:/proc/11000> kill 11000
    mb@lfs:/proc/11000> kill 11000
    mb@lfs:/proc/11000> kill -9 11000
    mb@lfs:/proc/11000> kill -9 11000
    bash: kill: (11000) - No such process

    Now it's some kind of reproducible (maybe because
    the machine has a higher uptime, now).
    A ./configure run sooner or later stalls for sure, now.

    mb@lfs:~> vmstat
    procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
    r b swpd free buff cache si so bi bo in cs us sy id wa
    13 0 92 42520 43696 235384 0 0 33 75 2201 1949 88 12 0 0


    - --
    Regards Michael Buesch [ http://www.tuxsoft.de.vu ]


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