Note migration of tunable from hw.bus.devctl_disable to

hw.bus.devctl_queue.  The sysctl interface provides legacys upport for
the latter sysctl, but the tunable support was removed.

MFC after:	1 day

1 files changed, 6 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index 8db99bf..8056923 100644
--- a/UPDATING
+++ b/UPDATING
@@ -22,6 +22,12 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 9.x IS SLOW:
 	machines to maximize performance.  (To disable malloc debugging, run
 	ln -s aj /etc/malloc.conf.)
 
+20090825:
+	The old tunable hw.bus.devctl_disable has been superseded by
+	hw.bus.devctl_queue.  hw.bus.devctl_disable=1 in loader.conf should be
+	replaced by hw.bus.devctl_queue=0.  The default for this new tunable
+	is 1000.
+
 20090813:
 	Remove the option STOP_NMI.  The default action is now to use NMI only
 	for KDB via the newly introduced function stop_cpus_hard() and