From: Albert Chin (tru64-unix-managers@mlists.thewrittenword.com)
Date: Fri Jul 06 2007 - 15:08:42 EDT
We're creating a chroot environment on 4.0D and 5.1 to perform
software builds from. We want to perform FFM mounts of /dev/tty,
/dev/mem, and /dev/kmem. However, the 4.0D/5.1 systems keep rebooting.
The 5.1 system reboots with:
trap: invalid memory write access from kernel mode
faulting virtual address: 0x0000000000000038
pc of faulting instruction: 0xfffffc000030fbd0
ra contents at time of fault: 0xfffffc000030fbb4
sp contents at time of fault: 0xfffffe04288475c0
panic (cpu 0): kernel memory fault
syncing disks... done
We can consistently force this with the following shell command:
# a=1; while [[ $a -lt 10000 ]]; do a=$(( $a + 1 )); echo $a; \
mount -t ffm /dev/tty /mnt/foo; umount /mnt/foo; done
Are FFM mounts unreliable? We have a 5.1B system and get the exact
same error with the same shell command.
The 5.1 system (Rev. 732) has the latest patches from
T64V51B20AS0006-20030210.tar.
The 5.1B system (Rev. 2650) has the latest patches from
T64V51BB27AS0006-20061208.tar.
-- albert chin (china@thewrittenword.com)
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