kern/68442: panic - acquiring duplicate lock of same type: "s leepq chain"

[Don Bowman]

From: Brian Fundakowski Feldman [mailto:green at FreeBSD.org]
 ...

> > 
> > (What hurts most, is, that in one occasion I had a ddb prompt
> > and could call doadump() successfully. But after reboot, damn 
> > /var was full, so savecore could not write it to disk, argl!).
> 
> You can make /var/crash a symlink to a directory with more space.
> 

Happens to me all the time. When the machine comes back
up, make some space somewhere, and just run savecore
again (with force if needed), you'll usually get a good
core.