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. _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"