Re: Panic _at_r205276 (Fatal trap 12: page fault while in kernel mode)

On 18 Mar 2010, at 13:35, David Wolfskill wrote:

> On first reboot after building & installing; yesterday (_at_r205249) was OK:
> 
> 3  1. Boot FreeBSD [default]              3     |_|   |_|  \___|\___|
> 3  2. Boot FreeBSD with ACPI disabled     3      ____   _____ _____
> 3  3. Boot FreeBSD in Safe Mode           3     |  _ \ / ____|  __ \
> 3  4. Boot FreeBSD in single user mode    3     | |_) | (___ | |  | |
> 3  5. Boot FreeBSD with verbose logging   3     |  _ < \___ \| |  | |
> 3  6. Escape to loader prompt             3     | |_) |____) | |__| |
> 3  7. Reboot                              3     |     |      |      |
> 3                                         3     |____/|_____/|_____/
> 3                                         3
> 3                                         3
> 3                                         3
> 3  Select option, [Enter] for default     3
> 3  or [Space] to pause timer  0           3
> _at_DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDY
> 
> 
> GDB: no debug ports present
> KDB: debugger backends: ddb
> KDB: current backend: ddb
> Copyright (c) 1992-2010 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 is a registered trademark of The FreeBSD Foundation.
> FreeBSD 9.0-CURRENT #102 r205276: Thu Mar 18 06:06:56 PDT 2010
>    root_at_freebeast.catwhisker.org:/common/S4/obj/usr/src/sys/GENERIC i386
> WARNING: WITNESS option enabled, expect reduced performance.
> 
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address   = 0xf000efd2
> fault code              = supervisor read, page not present
> instruction pointer     = 0x20:0xc093a0c8
> stack pointer           = 0x28:0xc142071c
> frame pointer           = 0x28:0xc142071c
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                        = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 0 ()
> [ thread pid 0 tid 0 ]
> Stopped at      strlen+0x8:     cmpb    $0,0(%edx)
> db> bt
> Tracing pid 0 tid 0 td 0xc0e02df0
> strlen(f000efd2,c142086c,cccccccc,ccccccc,cccccccc,...) at strlen+0x8
> kvprintf(c0ca617e,c08c9880,c142086c,a,c14208ac,...) at kvprintf+0x8fe
> vsnprintf(c0e048e0,100,c0ca617e,c14208ac,0,...) at vsnprintf+0x3b
> panic(c0ca617e,f000efd2,c0cd1cd6,dcc,c1420a68,...) at panic+0x8d
> _mtx_lock_flags(5c,0,c0cd1cd6,dcc,c142091c,...) at _mtx_lock_flags+0x9a
> _vm_map_lock_read(0,c0cd1cd6,dcc,5d,0,...) at _vm_map_lock_read+0x30
> vm_map_lookup(c1420a50,f000f000,1,c1420a54,c1420a44,...) at vm_map_lookup+0x38
> vm_fault(0,f000f000,1,0,f000ff63,...) at vm_fault+0xa5
> trap_pfault(5,0,c0ce1b15,c0d904c0,c0e02b40,...) at trap_pfault+0x17b
> trap(c1420b70) at trap+0x4a8
> calltrap() at calltrap+0x6
> --- trap 0xc, eip = 0xc08853d6, esp = 0xc1420bb0, ebp = 0xc1420bd0 ---
> _mtx_lock_flags(f000ff53,0,c0cd0df2,9a2,0,...) at _mtx_lock_flags+0x46
> zone_alloc_item(c0d9b5fc,c0cd12d4,c0cd11fb,c15ba000,c1420c88,...) at zone_alloc_item+0x33
> hash_alloc(c15ba008,c0cd12d4,c0cd11fb,10,df,...) at hash_alloc+0x54
> keg_ctor(c15ba000,80,c1420c88,2,c1420c88,...) at keg_ctor+0x234
> zone_alloc_item(c0f7d380,180,c1420c88,c0d9b5fc,20000000,...) at zone_alloc_item+0x176
> zone_ctor(c0f7d380,180,c1420cd8,2,c0cd33f3,...) at zone_ctor+0x1d2
> uma_startup(c158b000,30,7ff60000,3,c158b000,...) at uma_startup+0x1db
> vm_page_startup(c15bb000,a,c1420d88,c084f0b6,0,...) at vm_page_startup+0x1d0
> vm_mem_init(0,141ec00,141ec00,141e000,1425000,...) at vm_mem_init+0x18
> mi_startup() at mi_startup+0x96
> begin() at begin+0x2c
> db> 
> 

I have the same panic. I'll try to revert 205266.

--
Rui Paulo