K 10
svn:author
V 6
scottl
K 8
svn:date
V 27
2014-04-15T07:54:17.190933Z
K 7
svn:log
V 430
MFC r262814

- 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.

Submitted by:	jeffr

END