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kern/38655: ld(4) on twa(4) and twe(4) panic at shutdown

>Number:         38655
>Category:       kern
>Synopsis:       ld(4) on twa(4) and twe(4) panic at shutdown
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 14 03:50:00 +0000 2008
>Originator:     Simon Burge
>Release:        NetBSD current as of May 13 2008
Architecture: all?
Machine: all?
        pmf_system_shutdown() is called at splhigh() on all
        architectures (except atari!) and the twe(4) driver
        flush function ends up calling tsleep() and you get
        the following panic:

                panic: cpu_switcho: switching above IPL_SCHED

        Reboot a system with a twa(4) or twe(4) (and possibly
        with or(4) and iop(4) but this isn't known).

        A suggested fix involving polling was posted in:

        A reply for not doing this was posted in:

        Further postings in:

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