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| author | Colin Percival <cperciva@FreeBSD.org> | 2021-09-16 16:22:42 +0000 |
|---|---|---|
| committer | Colin Percival <cperciva@FreeBSD.org> | 2021-09-16 19:23:19 +0000 |
| commit | b43d7aa09b3c91fb6b652306db2ac13e1459c497 (patch) | |
| tree | db4b48a64004e6634758edaaa03c10a13a776349 | |
| parent | 0aa2a94ea6359fb2587af81841fbf8eb30ab36b0 (diff) | |
| download | src-b43d7aa09b3c.tar.gz src-b43d7aa09b3c.zip | |
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
| -rw-r--r-- | release/Makefile.ec2 | 4 |
1 files changed, 0 insertions, 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 |