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Date:      Thu, 6 Feb 1997 15:02:39 -0800
From:      "Jin Guojun[ITG]" <jin@george.lbl.gov>
To:        hackers@freebsd.org
Cc:        bugs@freebsd.org
Subject:   how to find where system hanging?
Message-ID:  <199702062302.PAA04566@george.lbl.gov>

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I have a ATM driver that works well under 2.1.6-RELEASE or earlier.
However, under 2.2 serial release, it gets hanging frequently.
Before 2.2-BETA, it hangs about once a day or less. Under 2.2-GAMMA,
it gets hanging very often, sometimes it hangs just after booting up.

Is there any way to force coredump when the system is hanging?
Or is there a mechanism to trace where it is hanging.
Any hints what part of the kernel changing would cause this problem.

Please help!

Thanks in advance,

-Jin



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