misc/166340: Process under FreeBSD 9.0 hangs in uninterruptable
sleep with apparently no syscall (empty wchan)
Kostik Belousov
kostikbel at gmail.com
Fri Mar 23 23:00:30 UTC 2012
The following reply was made to PR misc/166340; it has been noted by GNATS.
From: Kostik Belousov <kostikbel at gmail.com>
To: bug-followup at FreeBSD.org, christian.esken at trivago.com, avg at freebsd.org
Cc:
Subject: Re: misc/166340: Process under FreeBSD 9.0 hangs in uninterruptable
sleep with apparently no syscall (empty wchan)
Date: Sat, 24 Mar 2012 00:54:03 +0200
Please, attach the kgdb to the running system when the process hang
with the '-' wchan.
Use the command like "kgdb /boot/kernel/kernel.symbols /dev/mem".
Then, run the shell command ps -o pid,paddr | grep <pid> where pid is
the pid of the hung
process. Take the printed address A and, from kgdb, do:
p *(struct proc *)A
p/x *(((struct proc *)A)->p_threads.tqh_first)
and show us the output.
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