Date: Sun, 11 Apr 2004 16:15:30 +0100 From: "Sarunas V." <vsarunas@eircom.net> To: current@freebsd.org Subject: Panic: Lock GEOM Message-ID: <20040411151530.GA1221@laserbeam.sv.org>
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Hello,
When I try to mount a cdrom before the actual disc is scanned (ie. I do #mount
/cdrom when the tray of drive is closing). The the disc is scanned as normal, but the
actual command stays idle for about 20 seconds, only then it is mounted.
I first noticed this weird behavior around 3 weeks ago. I don't get any
warnings/errors if the cd was scanned fully.
Today I decided to investigate, so I dropped down to console while mounting
pre-scanned cd and saw around 50 lines of this:
acd0: WARNING - REQUEST_SENSE read data overrun 18>0
But then when returning to X, a panic occurred with kernel from 7 of April:
Panic: Lock GEOM topology not exclusively locked @
/usr/src/sys/geom/geom_subr.c : 390 at line 346 in file
/usr/src/sys/kern/kern_sx.c.
Debugger("panic")
Stopped at Debugger + 0x45: xchgl %ebx, in_Debugger.0
Is the panic related in any way to the warning?
Unfortunately I did not have dumpdev=/dev/my_swap in my /etc/rc.conf, so the dump was not saved,
to make the matters worse I did not copy down the results of tr.
I tried to reproduce the panic, but I wasn't successful. The box wasn't
overloaded or anything when the panic occurred, just running few xterms,
firefox and fluxbox as my window manager.
After playing with this more, the same warning/error can achieved by leaving the tray open while
booting, it will be automatically closed around the usb stuff. The disc is
about to be scanned/is scanned when it gets to the acd0* check.
Here is what I get booting in verbose mode with today's generic kernel(
cvsuped around 5 hours ago):
acd0: <LITE-ON LTR-40125S/ZS0N> CDRW drive at ata1 as master
acd0: read 8250KB/s (8250KB/s) write 6875KB/s (6875KB/s), 2048KB buffer, PIO4
acd0: Reads: CDR, CDRW, CDDA stream, packet
acd0: Writes: CDR, CDRW, test write, burnproof
acd0: Audio: play, 255 volume levels
acd0: Mechanism: ejectable tray, unlocked
acd0: Medium: CD-ROM unknown
acd0: WARNING - REQUEST_SENSE read data overrun 18>0
<message repeated 55 times>
acd0: WARNING - REQUEST_SENSE read data overrun 18>0
I am the only one who gets this?
My motherboard is MSI KT6 Delta, with VIA KT 600 chip set: VIA 8237 UDMA133
controller. The CPU is AMD Athlon 850 mhz, 384 mb ram. The CDRW drive is
LITE-ON LTR-40125S. The BIOS version is 3.31a with last update of 7/21/2003.
Thanks in advance,
Sarunas V.
--
"Every moment is a golden one for him who has the vision to recognize it as such."
--Henry Miller
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