DragonFly bugs List (threaded) for 2007-07
double fault when nullmounting
I just got this double fault when I was doing some layered mounts:
Fatal double fault
I'll look the symbols up. I guess that was a stack overflow, the second one.
This is a two processor hyperthreading Xeon (4 logical CPUs), SMP kernel.
The mounting was something like this:
server:/pbulk on /pbulk nfs
/dev/ad6s1b on /pbulk2 ufs
/pbulk2/root on /pbulk/root null
/pbulk2/clients on /pbulk/clients null
/pbulk/root on /pbulk/clients/subdir/root null,ro
/pbulk/clients/subdir/var on /pbulk/clients/subdir/root/var null
/pbulk/clients/subdir/tmp on /pbulk/clients/subdir/root/tmp null
/pbulk/clients/subdir/dev on /pbulk/clients/subdir/root/dev null
/pbulk/clients/subdir/usr.pkg on /pbulk/clients/subdir/root/usr/pkg null
there it paniced. however, I was doing that from a shell script, so maybe something unfinished before was doing it. This was kind of reproducable: I did the same sequence one time before and the box just rebooted.
I probably won't be able to reproduce this because the machine is part of a cluster of our lab and it is in a server room, meaning other people want to use it, it is cold there, I have other stuff to do :/
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