6.0-BETA2/amd64, v40z and Fatal trap 12: page fault while in kernel mode

From: Krzysztof Kowalik <kkowalik_at_uci.agh.edu.pl>
Date: Fri, 12 Aug 2005 12:43:51 +0200
Hello.

Today, I got the following panic:

Fatal trap 12: page fault while in kernel mode
cpuid = 7; apic id = 07
fault virtual address   = 0x188
fault code              = supervisor read, page not present
instruction pointer     = 0x8:0xffffffff80255ea7
stack pointer           = 0x10:0xffffffffc1832500
frame pointer           = 0x10:0x0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 608 (ls)
trap number             = 12
panic: page fault
cpuid = 7

It happened, when I had...

dd if=/dev/da1 of=bzzz count=10 bs=1073741824

... running on the first console and tried 'ls bzzz' on the other.

[...]
isp0: <Qlogic ISP 2312 PCI FC-AL Adapter> port 0x3000-0x30ff mem
0xe7002000-0xe7002fff irq 37 at device 1.0 on pci37
[...]
da1 at isp0 bus 0 target 0 lun 0
da1: <SB-3160F S > Fixed Direct Access SCSI-2 device
da1: 200.000MB/s transfers, Tagged Queueing Enabled
da1: 841784MB (1723973632 512 byte sectors: 255H 63S/T 107312C)
[...] [1]
 
Before that, when trying to read a few small blocks from the same
device, we got pretty strange output -- looking like a looped first
block "count" times.

I guess I will have to try to get vmcore to have any chance to interest
someone with it. And that won't be easy as the box has 16GB of RAM and,
unfortunately, the FC array we used, is normally connected to the
production box and we can't really experiment on it freely.

[1] dmesg (non-verbose; verbose one is far too verbose, thanks to mpt;
    and without the mentioned before da1, as we had to reconnect the
    array to the proper machine) attached.
-- 
Krzysztof Kowalik               |  () ASCII Ribbon Campaign
Computer Center, AGH UST        |  /\ Support plain text e-mail

Received on Fri Aug 12 2005 - 08:43:53 UTC

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