K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2010-11-22T08:19:18.987019Z
K 7
svn:log
V 157
Merge from r215652:
    Use atomic instruction to set _has_writer, otherwise there is a race
    causes userland to not wake up a thread sleeping in kernel.

END