Author: cperciva
Date: Sun Aug 26 03:56:54 2018
New Revision: 338321
URL: https://svnweb.freebsd.org/changeset/base/338321
Log:
Disable atkbd0 and atkdbc0 in EC2 AMIs. This has the effect of skipping
the probing and attaching of the PS/2 mouse (not present on EC2) and
keyboard (emulated, but not accessible via EC2).
Note that we disable atkbd0 separately even though during device probing
it shows up as a child of atkbdc0; this is necessary because the device
is also initialized during the early console setup from hammer_time.
This change cuts the kernel boot time on an EC2 c5.4xlarge instance from
7259ms down to 4727 ms.
Approved by: re (marius)
Modified:
head/release/tools/ec2.conf
Modified: head/release/tools/ec2.conf
==============================================================================
--- head/release/tools/ec2.conf Sun Aug 26 02:09:20 2018 (r338320)
+++ head/release/tools/ec2.conf Sun Aug 26 03:56:54 2018 (r338321)
@@ -68,6 +68,13 @@ vm_extra_pre_umount() {
echo 'autoboot_delay="-1"' >> ${DESTDIR}/boot/loader.conf
echo 'beastie_disable="YES"' >> ${DESTDIR}/boot/loader.conf
+ # The emulated keyboard attached to EC2 instances is inaccessible to
+ # users, and there is no mouse attached at all; disable to keyboard
+ # and the keyboard controller (to which the mouse would attach, if
+ # one existed) in order to save time in device probing.
+ echo 'hint.atkbd.0.disabled=1' >> ${DESTDIR}/boot/loader.conf
+ echo 'hint.atkbdc.0.disabled=1' >> ${DESTDIR}/boot/loader.conf
+
# EC2 has two consoles: An emulated serial port ("system log"),
# which has been present since 2006; and a VGA console ("instance
# screenshot") which was introduced in 2016.
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