ia64 r225789 panic during "make installworld": Bad buffer logic, remain = 0

[Jaakko Heinonen]

On 2011-09-28, Anton Shterenlikht wrote:
> KDB: stack backtrace:
> getenv with the following non-sleepable locks held:
> exclusive sleep mutex vnode interlock (vnode interlock) r = 0 (0xe000000011950488) locked @ /usr/src/sys/fs/devfs/devfs_vnops.c:406
> 
> etc. until a hang, requiring cold reset via MP.

Someone is calling getenv with a vnode interlock held. You need to
figure out the caller. Unfortunately the backtrace is missing above.

As a temporary workaround you could comment the WITNESS_WARN() line in
getenv() (sys/kern/kern_environment.c) but it is not a real fix.

-- 
Jaakko