biorq waitq can be freed before a page.  This allows me to bring back r22451. I did slash2 build/kernel builds, tar/ssh and iozone without crashes.
biorq waitq can be freed before a page.  This allows me to bring back r22451.
I did slash2 build/kernel builds, tar/ssh and iozone without crashes.


git-svn-id: ae92b08b608af1c8cefa3e10d2325ea527204e07@22476 3eda493b-6a19-0410-b2e0-ec8ea4dd8fda

pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable,pscedu/slash2-stable