Unkillable and runaway processes
Michael Plass
plass at parc.com
Wed Sep 5 11:39:07 PDT 2007
On Wed, 05 Sep 2007, Benjamin Close wrote:
> I'd love to debug here this but can't as the box uses a USB
> mouse/keyboard so every time I drop to a debugger I lose keyboard
> support :(
I have had some success using DDB with a USB keyboard by removing atk
and kbdmux from the kernel config (nodevice lines for atkbdc, atkbd,
psm, and kbdmux).
A downside is that when I do this, dumps stop working - they hang on
the call to cncheckc() when checking for user abort (the cncheckc()
never returns). Replacing this call with (-1) allows the dump to
proceed. For me, the relevant file is /usr/src/sys/amd64/amd64/
minidump_machdep.c.
- Michael
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