K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2014-03-06T00:13:21.216622Z
K 7
svn:log
V 508
 - If we fail to do a non-blocking acquire of a buf lock while doing a
   waiting sync pass we need to do a blocking acquire and restart.
   Another thread, typically the buf daemon, may have this buf locked and
   if we don't wait we can fail to sync the file.  This lead to a great
   variety of softdep panics because we rely on all dependencies being
   flushed before proceeding in several cases.

Reported by:	pho
Discussed with:	mckusick
Sponsored by:	EMC / Isilon Storage Division
MFC after:	2 weeks

END