K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2010-08-20T20:58:57.776036Z
K 7
svn:log
V 598
Revert 210173 as it did not properly fix the bug.  It assumed that the
VI_LOCK() for a given vnode was used as the internal interlock for that
vnode's v_lock lockmgr lock.  This is not the case.  Instead, add dedicated
routines to toggle the LK_NOSHARE and LK_CANRECURSE flags.  These routines
lock the lockmgr lock's internal interlock to synchronize the updates to
the flags member with other threads attempting to acquire the lock.  The
VN_LOCK_A*() macros now invoke these routines, and the softupdates code
uses these routines to temporarly enable recursion on buffer locks.

Reviewed by:	kib

END