Disable the ctl driver in GENERIC.

It unfortunately steals a fair chunk of RAM at startup even if it's not
actively used, which prevents FreeBSD VMs of 128MB from successfully
booting and running.

3 files changed, 9 insertions, 2 deletions

diff --git a/UPDATING b/UPDATING
index 74da04d..50e6452 100644
--- a/UPDATING
+++ b/UPDATING
@@ -26,6 +26,13 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 10.x IS SLOW:
 	disable the most expensive debugging functionality run
 	"ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20130301:
+	The ctl device has been disabled in GENERIC for i386 and amd64.
+	This was done due to the extra memory being allocated at system
+	initialisation time by the ctl driver which was only used if
+	a CAM target device was created.  This makes a FreeBSD system
+	unusable on 128MB or less of RAM.
+
 20130208:
 	A new compression method (lz4) has been merged to -HEAD.  Please
 	refer to zpool-features(7) for more information.
diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
index 5819a0d..3988195 100644
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -138,7 +138,7 @@ device		sa		# Sequential Access (tape etc)
 device		cd		# CD
 device		pass		# Passthrough device (direct ATA/SCSI access)
 device		ses		# Enclosure Services (SES and SAF-TE)
-device		ctl		# CAM Target Layer
+#device		ctl		# CAM Target Layer
 
 # RAID controllers interfaced to the SCSI subsystem
 device		amr		# AMI MegaRAID
diff --git a/sys/i386/conf/GENERIC b/sys/i386/conf/GENERIC
index 47af43b..3a98ded 100644
--- a/sys/i386/conf/GENERIC
+++ b/sys/i386/conf/GENERIC
@@ -146,7 +146,7 @@ device		sa		# Sequential Access (tape etc)
 device		cd		# CD
 device		pass		# Passthrough device (direct ATA/SCSI access)
 device		ses		# Enclosure Services (SES and SAF-TE)
-device		ctl		# CAM Target Layer
+#device		ctl		# CAM Target Layer
 
 # RAID controllers interfaced to the SCSI subsystem
 device		amr		# AMI MegaRAID