Date: Tue, 11 Jul 1995 22:04:55 GMT From: iain@nwpeople.demon.co.uk (Iain Baird) To: bugs@freebsd.org Subject: 950622-SNAP system lockup Message-ID: <739@nwpeople.demon.co.uk>
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Hi,
I have installed 2.0.5-950622-SNAP on the following hardware:
Gateway 4DX66-P
Adaptec AHA-2940
Seagate Barracuda ST31250
Diamond Stealth 64 VRAM PCI
DTC PCI IDE Controller
Western Digital Caviare 540MB (Not used for FreeBSD)
SMC Elite Ultra
SoundBlaster 16
The installation went fine.
I had logged in and was rebuilding the kernel. I logged in on
another virtual console and started to un-tar data from a floppy.
At this point the system locked solid, with the hard drive activity
light on. After a hard reset and reboot fsck reported all filesystem
errors fixed, but when I attempted to login I saw a message along the
lines of "login: exec format error", so it looks like something is
hosed.
This is similar to problems I experienced with late 2.0 snapshots,
I did not report them as decided to wait for 2.0.5.
The problem seems to be triggered by more than one process concurrently
performing intensive disk I/O. In the past it has occurred when running
a tar pipeline, e.g.
tar -cf - . | (cd elsewhere; tar -xf -)
With late 2.0 snapshots such a tar pipeline would *always* cause a lockup,
provided non-trivial amounts of data were involved. I never saw intensive
disk I/O by a single process cause this problem - kernel rebuilds completed
OK as long as little else was happening. I have less of a sample size with
950622-SNAP as the lockup seems to have hosed my system, but I had one
kernel rebuild complete successfully while nothing else was happening.
I vaguely recall reading something about a bug which occurred with fast
disks. The ST31250 is pretty fast, could this be a factor?
Please let me know if you require further information about my system,
or would like me to run any tests - I'm prepared so invest some effort
in helping to solve this.
Thank you all for your hard work.
iain
--
Iain Baird Network People International
Tel: +44 (0)1732 743591
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