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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8

    * Alexander Batyrshin <> wrote:

    > used i386/defconfig

    > BUG: semaphore recursion deadlock detected!
    > .. current task khpsbpkt/723 is already holding c04610c0.

    ok, this should be fixed in -U9.2.

    > 2.
    > if execute
    > ``for i in `seq 1 9999`; do nohup bash >/dev/null 2>&1 & done'',
    > then you'll get something like:
    > [...skip...]
    > Warning: dev (pts0) tty->count(16) != #fd's(8) in tty_open
    > Warning: dev (pts0) tty->count(16) != #fd's(11) in tty_open

    > I'v tested it against linux-2.6.9-rc4-mm1 => all was ok

    i have trouble reproducing this myself. Can you still trigger it under
    -U9.2? If yes then could you check whether this still happens with a the
    same .config but with CONFIG_SMP turned off? This smells like a locking
    bug/breakage in the tty layer that we dont detect. You have all the
    relevant debug options turned on, correct? (DEBUG_PREEMPT and

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      Last update: 2005-03-22 14:07    [W:0.021 / U:14.612 seconds]
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