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    Subjectrace in autofs / nfs

    there is a race in 2.4.1 and 2.4.2-pre3 in autofs/nfs.
    When the cwd is on the nfs mounted server (== busy) and you try to
    reboot the shutdown hangs in "rcautofs stop". I can reproduce it everytime.

    I attach a screen log and a decoded sysrq output. It is not related to
    that killproc, it hangs right now in automount <-> kupdate (with kernel

    kupdate 6 0 0 -1 ?00000000 c307a000 0 current
    automoun 1525 31480 503680 54 u0176a368 df3e6000 1 current

    there is a spinlock message:
    _spin_lock(c021f6e4) CPU#1 NIP c01b8220 holder: cpu 1 pc E126BF28

    c021f6e4 is not in the, but c01b8220 is
    c01b817c T memparse
    c01b8200 T atomic_dec_and_lock
    c01b9a5c t cleanup_proc_rtas

    The attached log is kernel 2.4.2-pre3.
    killproc 1701 1030738 16491808 106 u0178d5c8 c7de6000 0 current
    automoun 1705 1036120 16577920 54 u0176a368 c7b46000 1 current
    _spin_lock(c022279c) CPU#1 NIP c01b7c5c holder: cpu 1 pc E126BF28
    SysRq: Emergency Sync

    _spin_lock(c022279c) CPU#0 NIP c005d920 holder: cpu 1 pc E126BF28
    _spin_lock(c022279c) CPU#1 NIP c01b7c5c holder: cpu 1 pc E126BF28

    c01b7c5c is again atomic_dec_and_lock and c005d920 is d_lookup.

    The system is a 2way RS/6000, 2gig ram.

    Linux cantaloupe 2.4.1-SMP #1 SMP Sun Feb 11 13:02:05 GMT 2001 ppc
    Kernel modules 2.4.1
    Gnu C 2.95.2
    Gnu Make 3.79.1
    Linux C Library x 1 root root 1499361 Feb 9 02:50
    Dynamic linker ldd (GNU libc) 2.2
    Procps 2.0.7
    Mount 2.10q
    Net-tools 1.57
    Kbd 1.02
    Sh-utils 2.0
    Modules Loaded nfsd autofs4 ipv6

    Any ideas what could be wrong?

    Gruss Olaf

    $ man clone

    Main feature not yet implemented...
    [unhandled content-type:application/x-gunzip][unhandled content-type:application/x-gunzip]
     \ /
      Last update: 2005-03-22 13:13    [W:0.023 / U:144.172 seconds]
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