Date: Thu, 22 Oct 1998 07:31:56 -0700 (PDT) From: "Robert J. Brown" <rjb@netpr.com> To: freebsd-scsi@FreeBSD.ORG Subject: Panic in 3.0 Message-ID: <Pine.BSF.3.96.981022072836.25979A-100000@mojo.calyx.net>
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Issue: bt0 driver crashes the kernel
FreeBSD Version: 3.0-RELEASE
Hardware: Buslogic BT-958 (Firmware 5.07B, BIOS 4.96I)
Kernel: Default kernel that ships with 3.0-RELEASE
Reproducable: Intermittently
How it happened: I did a "find / -perm -4000 -print > SUID" and it caused a
panic.
Details:
Ok, the first time this happened I didn't have savecore enabled. The first
panic produced this message:
panic bt0: too few mailboxes or to many ccbs
syncing disks... 263 263 263 263 263 263 263 263 263 263 263 263
263 263 giving up
So I rebooted, did the same find command, and it crashed again with the
same panic message, but this time it produced a screenful of information
along with it. Unfortunately, I couldn't get it captured before it
automatically rebooted (it said it would wait for a keypress but it didn't.)
I tried a few more times, and it completed the find command successfully
without panicing the system. Unfortunately I didn't have savecore turned
on when this happened (it's on now.) Anyway, here's a small breakdown of
the hardware:
400MHz Intel PII (the real, boxed chip)
Asus P2B Motherboard
Mylex BT-958 PCI
Quantum Atlas QM39100TD-SW 9GB UW Drive at ID 0
Sony SDT-9000 DAT Drive at ID 4
CDROM at ID 2
(2) Intel EtherExpress Pro 100B PCI NIC cards
After a few days, I did get the following messages:
(da0:bt0:0:0:0): CCB 0xf56c1b80 - timed out
(da0:bt0:0:0:0): CCB 0xf56c1b80 - timed out
bt0: No longer in timeout
(da0:bt0:0:0:0): CCB 0xf56c2380 - timed out
(da0:bt0:0:0:0): CCB 0xf56c2380 - timed out
bt0: No longer in timeout
Not quite sure what they mean. Anyway, I know this isn't much help but at
least it identifies that a possible problem does exist :) Once I get a
savecore, I'll post a backtrace and a location to grab my newly compiled
kernel (I recompiled against -current, but it doesn't look like the bt
stuff has changed.)
One interesting thing is that this BT-958 came with newer
firmware and bios revisions than the publicly availble flashed
versions (5.07b/4.96i is what it came with.) I don't know if that is
significant, but it did make me wonder...
-Rob
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