> > Can anyone take a look on PR kern/104406 ? I got repeatable hang
situation,
> > but I can't obtain a kernel dump to get result of all show commands from
> > here:
> >
> >
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html
> >
> > After my break to debugger using Ctrl+Alt+Esc sequence and entering a
> > "panic" command kernel does not wrote a kernel dump but seems to hang.
Can
> > anyone describe how to obtain a kernel dump in this situation, or at
least
> > say - which output of show commands need in first place to debug this ?
> > Output of all suggested commands is huge and I afraid of making mistake
> > when carrying this output from screen to list of paper and back :-)
>
> Oleg, one thing you can do to make this less painful is to
> run your machine's console over serial port.
>
> First get a crossover serial cable, make sure it works from one
> box to another, it should be easy to run "tip com1" on both
> boxes to ensure that it works.
>
> Then you just need to add console=comconsole to /boot/loader.conf
> and your box's console should come over serial.
>
> Then on the machine watching the console, you can just do this:
>
> % script
> Script started, output file is typescript
> % tip com1
> ...do ddb stuff now...
> ...stop tip
> % exit
>
> now you should have everything logged into a file called "typescript"
> should save you a big headache.
Thanks, I'll try it in the monday morning.
I posted a followup to kern/104406 that includes all information listed in "Debugging Deadlocks" chapter of FreeBSD Developer's
Handbook. Can anyone take a look on it and say - is this certainly a hardware problem or some sort of software problem ?
--
Oleg Derevenetz <[EMAIL PROTECTED]> OOD3-RIPE
Phone: +7 4732 539880
Fax: +7 4732 531415 http://www.vsi.ru
CenterTelecom Voronezh ISP http://isp.vsi.ru
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