Date: Thu, 13 Feb 2003 13:05:22 +0100 From: Dag-Erling Smorgrav <des@ofug.org> To: alpha@freebsd.org, current@freebsd.org Subject: top-of-tree alpha kernel panics during boot Message-ID: <xzpn0l0v119.fsf@flood.ping.uio.no>
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Booting [/boot/kernel/kernel]...
Entering /boot/kernel/kernel at 0xfffffc000033a400...
sio1: gdb debugging port
Copyright (c) 1992-2003 The FreeBSD Project.
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The Regents of the University of California. All rights reserved.
FreeBSD 5.0-CURRENT #32: Thu Feb 13 12:41:50 CET 2003
des@dsa.thinksec.com:/usr/src/sys/alpha/compile/DSA
Preloaded elf kernel "/boot/kernel/kernel" at 0xfffffc0000756000.
Digital Personal Workstation (Miata)
Digital Personal WorkStation 600au, 598MHz
8192 byte page size, 1 processor.
CPU: EV56 (21164A) major=7 minor=0 extensions=0x1<BWX>
OSF PAL rev: 0x1000000020116
real memory = 266493952 (254 MB)
avail memory = 251977728 (240 MB)
Memory modified after free 0xfffffc00007b6000(8184)
panic: Most recently used by none
panic
Stopped at Debugger+0x38: zapnot v0,#0xf,v0 <v0=0x6>
db> trace
Debugger() at Debugger+0x38
panic() at panic+0x118
mtrash_ctor() at mtrash_ctor+0x84
uma_zalloc_arg() at uma_zalloc_arg+0x160
malloc() at malloc+0x94
kobj_class_compile() at kobj_class_compile+0x2c
devclass_add_driver() at devclass_add_driver+0x64
driver_module_handler() at driver_module_handler+0xb4
module_register_init() at module_register_init+0xa0
mi_startup() at mi_startup+0x144
locorestart() at locorestart+0x64
--- root of call graph ---
des@dsa ~% gdb -k /sys/alpha/compile/DSA/kernel.debug
GNU gdb 5.2.1 (FreeBSD)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "alpha-undermydesk-freebsd"...
(kgdb) list *(mtrash_ctor+0x84)
0xfffffc000056a684 is in mtrash_ctor (../../../vm/uma_dbg.c:138).
133
134 for (p = mem; cnt > 0; cnt--, p++)
135 if (*p != uma_junk) {
136 printf("Memory modified after free %p(%d)\n",
137 mem, size);
138 panic("Most recently used by %s\n", (*ksp == NULL)?
139 "none" : (*ksp)->ks_shortdesc);
140 }
141 }
142
(kgdb) list *(uma_zalloc_arg+0x160)
0xfffffc0000568bf0 is in uma_zalloc_arg (../../../vm/uma_core.c:1358).
1353 uma_dbg_alloc(zone, NULL, item);
1354 ZONE_UNLOCK(zone);
1355 #endif
1356 CPU_UNLOCK(zone, cpu);
1357 if (zone->uz_ctor)
1358 zone->uz_ctor(item, zone->uz_size, udata);
1359 if (flags & M_ZERO)
1360 bzero(item, zone->uz_size);
1361 return (item);
1362 } else if (cache->uc_freebucket) {
DES
--
Dag-Erling Smorgrav - des@ofug.org
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