From owner-freebsd-alpha@FreeBSD.ORG  Mon Mar 29 13:21:52 2004
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Date: Mon, 29 Mar 2004 16:21:51 -0500
From: Ken Smith <kensmith@cse.Buffalo.EDU>
To: freebsd-alpha@freebsd.org, freebsd-current@freebsd.org
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Subject: -current panic
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Is this one a known issue on alpha or is it something new?  While
someone was using gdb on beast (alpha cluster ref machine) to trace
a program beast crashes with this:

panic: mutex process lock not owned at ../../../kern/kern_mutex.c:277
at line 719 in file ../../../kern/kern_mutex.c
cpuid = 1;
Stack backtrace:
db_print_backtrace() at db_print_backtrace+0x18
backtrace() at backtrace+0x2c
__panic() at __panic+0x210
_mtx_assert() at _mtx_assert+0xec
_mtx_unlock_flags() at _mtx_unlock_flags+0xa4
ptrace_single_step() at ptrace_single_step+0x6c
kern_ptrace() at kern_ptrace+0x3c4
ptrace() at ptrace+0xe8
syscall() at syscall+0x37c
XentSys() at XentSys+0x64
--- syscall (26) ---
--- user mode ---
boot() called on cpu#1

It seems to be reproducible...

-- 
						Ken Smith
- From there to here, from here to      |       kensmith@cse.buffalo.edu
  there, funny things are everywhere.   |
                      - Theodore Geisel |