Witness panic in pseudofs_vncache

[Dag-Erling Smørgrav]

Robert Watson <rwatson at freebsd.org> writes:
> This appears to be a bug in pseudofs due to calling vgone() while holding
> the pfs_vncache_mutex, as vgone() can sleep due to acquiring lockmgr
> locks.  The fix is likely to make this looping even less efficient by
> dropping the mutex before calling vgone() on a vnode, and then restarting.
> I've CC'd DES because this is his baby.

What do you think of the attached patch?

DES
-- 
Dag-Erling Smørgrav - des at des.no

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