status of patches ( raid5 multiple threads )

Hi Shaohua  (and linux-raid maintainers),

Interested in knowing status of patches  "raid5  create multiple threads "
http://www.spinics.net/lists/raid/msg39978.html

Specifically want to know if it is available in any of the latest
kernel releases 3.x ?

Or otherwise when are these patches expected to get merged into linux
kernel tree.

Appreciate great work.

Thanks & regards
vincy