On Thu, Jul 16, 2015 at 07:34:20PM +0200, Emmanuel Dreyfus wrote: > David Holland <dholland-t...@netbsd.org> wrote: > > > Either make vnode locks interruptible, or debug puffs. > > > > I favor the former, but lost the argument a few years back. Others > > (including e.g. yamt) said no. > > Even as not interruptible, I can call VOP_LOCK with LK_NOWAIT and loop > on it until I decide it is time to give up.
Busy-looping like that on a vnode lock is Wrong(TM). > But once I failed to acquire > filesystem root vnode lock, how can I forcibly unmount it? You probably can't. It would be nice to have recovery logic for that level of problem, but it's not likely to happen anytime soon. -- David A. Holland dholl...@netbsd.org
