Date: Fri, 23 Mar 2012 23:00:30 GMT From: Kostik Belousov <kostikbel@gmail.com> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/166340: Process under FreeBSD 9.0 hangs in uninterruptable sleep with apparently no syscall (empty wchan) Message-ID: <201203232300.q2NN0U7k046575@freefall.freebsd.org>
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The following reply was made to PR misc/166340; it has been noted by GNATS. From: Kostik Belousov <kostikbel@gmail.com> To: bug-followup@FreeBSD.org, christian.esken@trivago.com, avg@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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