[Bug 192906] [dtrace] running dtest.pl causes VM to sporadically reboot

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192906

--- Comment #4 from Garrett Cooper <ngie at FreeBSD.org> ---
(In reply to Mark Johnston from comment #3)
> Does this happen if you run the legacy test suite from tools/test/dtrace? I
> can't reproduce this using kyua, but I didn't manage to get the test suite
> to complete either; it runs some tests that seem to never terminate. In the
> legacy suite, some tests are excluded, so this problem isn't encountered.

Yes. Thanks for the reminder about that directory (hadn't realized that it was
committed back in concert with some of the other changes we made).

> Also, which revision are you running? The bug that Anton mentioned should be
> fixed in r268600/r268869. I'm confused by the reference to
> dtrace_dbltrap_func though; DTrace does indeed have a double fault handler,
> but DTrace should never trigger a double fault.

I'm just referencing the panic message/message from VMware.

> There have also been some other recent fixes (r269525 and r270024) which are
> relevant.

I'm running CURRENT as of last week, but it doesn't include these changes (I'll
pull them in and retest).

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