Date: Mon, 15 Jan 2007 12:22:40 +0100 From: "Pietro Cerutti" <pietro.cerutti@gmail.com> To: freebsd-stable@freebsd.org, freebsd-hackers@freebsd.org Subject: atacontrol kernel crash (atausb?) Message-ID: <e572718c0701150322o38d463a0qc8ccca55a508e871@mail.gmail.com>
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Hello,
this is a reproducible kernel page-fault crash on stable as of 1h ago:
FreeBSD gahrtop.localhost 6.2-STABLE FreeBSD 6.2-STABLE #4: Mon Jan 15
11:24:56 CET 2007
root@gahrtop.localhost:/usr/obj/usr/src/sys/GAHRTOP i386
1) atacontrol list
ATA channel 0:
Master: ad0 <FUJITSU MHW2120BH/00000012> Serial ATA v1.0
Slave: no device present
ATA channel 1:
Master: no device present
Slave: acd0 <HL-DT-ST DVDRAM GSA-T10N/PA02> ATA/ATAPI revision 5
2) -> plug in USB stick (microspot 256MB USB2.0)
3) atacontrol list
ATA channel 0:
Master: ad0 <FUJITSU MHW2120BH/00000012> Serial ATA v1.0
Slave: no device present
ATA channel 1:
Master: no device present
Slave: acd0 <HL-DT-ST DVDRAM GSA-T10N/PA02> ATA/ATAPI revision 5
ATA channel 2:
Master: no device present
Slave: no device present
4) atacontrol attach ata2
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x24
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc050d8fa
stack pointer = 0x28:0xe8fd2bb8
frame pointer = 0x28:0xe8fd2bb8
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 = 900 (atacontrol)
trap number = 12
panic: page fault
cpuid = 0
Uptime = 5m46s
Physical memory: 2031 MB
Dumping 63 MB:
at this point nothing more appens. I have set debug.minidump=1 so
maybe this could be the cause for the RAM not to be dumped.
Furthermore, I read
" The atacontrol utility can cause severe system crashes and loss of data
if used improperly. Please exercise caution when using this command!
"
from the atacontrol(8) manual page, so maybe it's just me doing something wrong.
If it's the case, how can I scan for the just-plugged-in USB disk
using the atausb driver?
No device appears in /dev
last one: why atausb doesn't have a manual page??
Thanx,
--
Pietro Cerutti
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