K 10
svn:author
V 3
mav
K 8
svn:date
V 27
2013-08-24T08:06:57.600783Z
K 7
svn:log
V 411
Move tq_enqueue() call out of the queue lock for known handlers (actually
I have found no others in the base system).  This reduces queue lock hold
time and congestion spinning under active multithreaded enqueuing.

According to hwpmc, for ZFS benchmark doing 100K disk IOPS this moved 10% of
CPU time spent on lock spinning from this lock to UMA locks.  Hope that side
also can be addressed somehow sometimes.

END