Date: Tue, 9 Apr 2002 20:00:53 -0700 From: Marcel Moolenaar <marcel@xcllnt.net> To: current@FreeBSD.org Cc: jeff@FreeBSD.org Subject: UMA recurses on non-recursive lock Message-ID: <20020410030053.GA8134@dhcp01.pn.xcllnt.net>
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Gang,
The following is what I get when I enable witness on ia64 (SMP).
Is this known?
OK boot -sh
Entering /boot/kernel/kernel at 0xe00000000050a000...
Copyright (c) 1992-2002 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 5.0-CURRENT #2: Tue Apr 9 19:41:32 PDT 2002
marcel@dhcp01.pn.xcllnt.net:/usr/src/sys/ia64/compile/ITANIUM
recursed on non-recursive lock (sleep mutex) 256 @ ../../../vm/uma_core.c:1415
first acquired @ ../../../vm/uma_core.c:1415
panic: recurse
cpuid = 0; panic
CPU0 stopping CPUs: 0x00000000... stopped.
Stopped at 0xe0000000008b7cc1: nop.m 0x0
db> show witness
Sleep locks:
0 Giant -- last acquired @ ../../../kern/subr_witness.c:326
1 lockmgr -- last acquired @ ../../../kern/kern_lock.c:507
1 UMA lock -- last acquired @ ../../../vm/uma_core.c:1022
1 eventhandler -- last acquired @ ../../../kern/subr_eventhandler.c:78
2 UMA cpu -- last acquired @ ../../../vm/uma_core.c:1265
3 UMA zone -- last acquired @ ../../../vm/uma_core.c:1676
1 pgrpsess -- last acquired @ order list:0
2 proctree -- last acquired @ order list:0
3 allproc -- last acquired @ order list:0
4 process group -- last acquired @ order list:0
5 process lock -- last acquired @ order list:0
6 session -- last acquired @ order list:0
7 uidinfo hash -- last acquired @ order list:0
8 uidinfo struct -- last acquired @ order list:0
db> show locks
exclusive sleep mutex 256(UMA zone) (0xa000000013e72530) locked @ ../../../vm/uma_core.c:1415
exclusive sleep mutex eventhandler (0xe000000000a79850) locked @ ../../../kern/subr_eventhandler.c:162
exclusive sleep mutex Giant (0xe000000000a10c48) locked @ ../../../kern/subr_witness.c:326
--
Marcel Moolenaar USPA: A-39004 marcel@xcllnt.net
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