git: b43d7aa09b3c - main - EC2: Default to UEFI booting
Colin Percival
cperciva at FreeBSD.org
Thu Sep 16 19:23:47 UTC 2021
The branch main has been updated by cperciva:
URL: https://cgit.FreeBSD.org/src/commit/?id=b43d7aa09b3c91fb6b652306db2ac13e1459c497
commit b43d7aa09b3c91fb6b652306db2ac13e1459c497
Author: Colin Percival <cperciva at FreeBSD.org>
AuthorDate: 2021-09-16 16:22:42 +0000
Commit: Colin Percival <cperciva at FreeBSD.org>
CommitDate: 2021-09-16 19:23:19 +0000
EC2: Default to UEFI booting
This reduces the FreeBSD boot time by approximately 5 seconds,
roughly equally divided betwenn two factors:
* Disk I/O is faster in the EFI loader since it can perform larger
I/Os. (The BIOS loader is limited due to the use of bounce buffers
in sub-1M memory.)
* The EFI console is much faster than the VGA console.
Note however that not all EC2 instance types support UEFI; as a
general rule the newer instances (based on Amazon's "Nitro" platform)
support UEFI but the older instances (based on Xen) do not.
X-MFC: TBD based on tradeoff between performance and compatibility
Relnotes: yes
Sponsored by: https://www.patreon.com/cperciva
---
release/Makefile.ec2 | 4 ----
1 file changed, 4 deletions(-)
diff --git a/release/Makefile.ec2 b/release/Makefile.ec2
index ce21d93c37ad..b29f54715fb3 100644
--- a/release/Makefile.ec2
+++ b/release/Makefile.ec2
@@ -25,12 +25,8 @@ SSMOPTS= --ssm-name ${SSMPREFIX}/${TARGET_ARCH:S/aarch64/arm64/}/base/ufs/${REVI
EC2ARCH= --${TARGET_ARCH:S/aarch64/arm64/}
.endif
.if !defined(AMIBOOTMETHOD)
-.if ${TARGET_ARCH} == "amd64"
-AMIBOOTMETHOD= BIOS
-.else
AMIBOOTMETHOD= UEFI
.endif
-.endif
.if ${AMIBOOTMETHOD} == "UEFI" && ${TARGET_ARCH} == "amd64"
BOOTMODEOPT= --uefi
.endif
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