[nycbug-talk] nullfs, jails and quotas

[Charles Sprickman]

Here's a quick tip:

Don't try using nullfs to mount /usr/ports (or anything else) into a jail 
and then enable quotas on the jail's partition.  Really bad juju there.

This is on 6-stable.  On running quotacheck after killing off all jails, 
that process was hung, and anything else that touched that partition went 
into a "disk wait" state that was unkillable.  Running a shutdown just 
left the machine hanging in a not-quite-dead state.  It seems like the 
kernel will block forever on any processes waiting for that partition.  A 
reboot alone did not clear it, the background fsck also hung.

Just a friendly warning for anyone doing that kind of tinkering remotely - 
always unmount your nullfs mounts before screwing with quotas...

Charles