Greetings All,
I'm a new Unix Admin, and we are having problems with a DEC AlphaPC
165LX 533MHz running Dec Unix 4.0d. We are getting kernel panics
with message "Unaligned kernel space access from kernel mode".
It can be duplicated by telnetting to the Alpha, exporting the display
back to my own machine and starting a number of processes (such as
netscape) on the alpha. But if I do it on the same machine at the
console, the alpha will not crash. The active process is never the same
between panics.
Any pointers would be appreciated.
Thank you,
Jim Reese
Unix Admin
Alpine Electronics
jreese_at_alpine-la.com
-----------A short section of crash-data -----------------------------
can't read from process (address 0xfffffc706fd98458)
_panic_string: 0xfffffc00006cea20 = "Unaligned kernel space access from
kernel mode"
_panic_thread: 0xfffffc003fe142c0
msg_bufc = "Alpha boot: available memory from 0x18ec000 to
0x3fffe000
Digital UNIX V4.0D (Rev. 878); Thu Feb 12 19:46:23 PST 1998
Digital AlphaPC 164LX 533 MHz
Firmware revision: 5.0
PALcode: Digital UNIX version 1.22
tu0: DEC TULIP (10/100) Ethernet Interface, hardware address:
00-06-2B-00-00-AD
Unaligned kernel access va=0xfffffc00ef88ff7e pc=0xfffffc0000555080
ra=0xfffffc0000556470 inst=0xffffffff
panic (cpu 0): Unaligned kernel space access from kernel mode
_proc_thread_list_begin:
Begin Trace for machine_slot[paniccpu].cpu_panic_thread:
thread 0xfffffc003fe142c0 stopped at [boot:1890
,0xfffffc0000525b78] Source not available
> 0 boot() ["../../../../src/kernel/arch/alpha/machdep.c":1890,
0xfffffc0000525b78]
1 panic(0x2a0, 0x16, 0xfffffc003fe02800, 0xfffffc003fe02800,
0xbf496c) ["../../../../src/kernel/bsd/subr_prf.c":737,
0xfffffc0000282630]
2 thread_block() ["../../../../src/kernel/kern/sched_prim.c":2101,
0xfffffc00002b45e4]
3 thread_preempt(thread = 0xfffffc003fe142c0, processor =
0xfffffc00001d8100) ["../../../../src/kernel/kern/sched_prim.c":3975,
0xfffffc00002b6fac]
4 boot() ["../../../../src/kernel/arch/alpha/machdep.c":1836,
0xfffffc0000525a4c]
5 panic(0xa, 0xffffffff80000000, 0xc82cc70f, 0x0, 0x226c3)
["../../../../src/kernel/bsd/subr_prf.c":824, 0xfffffc00002827f4]
6 afault_trap(va = 0xfffffc00ef88ff7e, opcode = 0x29, regno = 0x1,
uac = 0x0, exc_frame = 0xffffffffa814f570, inst_addr = 0xa)
["../../../../src/kernel/arch/alpha/trap.c":2408, 0xfffffc000052d39c]
7 _XentUna(0x7, 0xfffffc0000555084, 0xfffffc00007086a0,
0xfb027f20ef88ff7e, 0x420034002500bf80)
["../../../../src/kernel/arch/alpha/locore.s":1767, 0xfffffc0000522390]
8 softerr_intr(0x2, 0x48, 0x1, 0x1a00000000, 0xfffffc0039e86b00)
["../../../../src/kernel/arch/alpha/hal/eb164.c":3003,
0xfffffc0000555080]
9 harderr_intr(0xfffffc0039e86b00, 0x620, 0xfffffc0000536a1c,
0xffffffffa814c000, 0x4)
["../../../../src/kernel/arch/alpha/hal/eb164.c":4291,
0xfffffc000055646c]
10 mach_error(0xfffffc0000536a1c, 0xffffffffa814c000, 0x4,
0xfffffc0000000000, 0xfffffc0000521f80)
["../../../../src/kernel/arch/alpha/hal/cpusw.c":863,
0xfffffc0000536a18]
11 _XentInt(0x4, 0xfffffc000040c930, 0xfffffc00007086a0,
0xfffffc0000753558, 0xffffffffa814f840)
["../../../../src/kernel/arch/alpha/locore.s":1312, 0xfffffc0000521f7c]
12 ether_input(0xfffffffffc330044, 0x18000, 0xfffffc00001d8114,
0xbf432a, 0x2000ad00002b0600)
["../../../../src/kernel/net/if_ethersubr.c":1048, 0xfffffc000040c92c]
13 tuintr(0x0, 0xfffffc0000238441, 0x1, 0xfffffc00001d8100,
0xfffffc0000753a90) ["../../../../src/kernel/io/dec/netif/if_tu.c":3617,
0xfffffc00005d68d4]
14 intr_dispatch_no_post(0x1, 0xfffffc00001d8100, 0xfffffc0000753a90,
0xfffffc00001d8100, 0xfffffc0000521ef0)
["../../../../src/kernel/arch/alpha/hal/shared_intr.c":239,
0xfffffc00005d216c]
15 _XentInt(0x0, 0xfffffc0000500a20, 0xfffffc00007086a0, 0x3fff, 0x1)
["../../../../src/kernel/arch/alpha/locore.s":1220, 0xfffffc0000521eec]
16 vm_page_tester() ["../../../../src/kernel/vm/vm_resident.c":2011,
0xfffffc0000500a1c]
17 idle_thread() ["../../../../src/kernel/kern/sched_prim.c":3448,
0xfffffc00002b62b0]
End Trace for machine_slot[paniccpu].cpu_panic_thread:
thread 0xfffffc003fe142c0 stopped at [boot:1890
,0xfffffc0000525b78] Source not available
Received on Fri Mar 27 1998 - 20:40:42 NZST