K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2018-08-17T15:41:01.501414Z
K 7
svn:log
V 438
Add INVARIANTS-only fences around lockless vnode refcount updates.

Some internal KASSERTs access the v_iflag field without the vnode
interlock held after such a refcount update.  The fences are needed for
the assertions to be correct in the face of store reordering.

Reported and tested by:	jhibbits
Reviewed by:	kib, mjg
MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D16756

END