nfs trap: page fault while in kernel mode

[Christian Brueffer]

Hi,

got the following trap on a 6-STABLE SMP system.  I was copying data
from a 7-CURRENT machine to the server via NFS.

System build of sources from about Sat Jan 28 13:07:02 CET.

(transcribed by hand, typos possible)

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0xdeadc0de
fault code              = supervisor write, page not present
instruction pointer     = 0x20:0xc0716370
stack pointer           = 0x28:0xd449db84
frame pointer           = 0x28:0xd449db84
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         = 32 (irq20: sf0)
[thread pid 32 tid 100020 ]
Stopped at      trash_dtor+0x10 movl    $0xdeadc0de,0(%edx)
db> tr
Tracing pid 32 tid 100020 td 0xc330a480
trash_dtor(deadc0de,800,0,d449dbb4,c059591c) at trash_dtor+0x10
trash_init(deadc0de,800,1,7f,7c) at trash_init+0x20
mb_zinit_pack(c38b2700,100,1,863,d449dbe8) at mb_zinit_pack+0x4c
uma_zalloc_bucket(c104d000,1,c07db3bc,761,d449dc1c) at uma_zalloc_bucket+0x1de
uma_zalloc_arg(c104d000,d449dc44,1,d449dc4c,c0596fbd) at uma_zalloc_arg+0x399
m_devget(c3790808,5ea,2,c3401400,0) at m_devget+0x90
sf_rxeof(8100,0,c09663ca,47b,c3403580) at sf_rxeof+0x1a0
sf_intr(c33eb700,0,c07c1a18,255,d449dd00) at sf_intr+0x1b7
ithread_loop(c3345380,d449dd38,c07c17e7,30d,ffffffff) at ithread_loop+0x182
fork_exit(c0586ee0,c3345380,d449dd38) at fork_exit+0xc1
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd449dd6c, ebp = 0 ---
db>

- Christian

-- 
Christian Brueffer	chris at unixpages.org	brueffer at FreeBSD.org
GPG Key:	 http://people.freebsd.org/~brueffer/brueffer.key.asc
GPG Fingerprint: A5C8 2099 19FF AACA F41B  B29B 6C76 178C A0ED 982D
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