From 5774911bfb304c2c9b5d6c3c798c21e2c40b59de Mon Sep 17 00:00:00 2001
From: Colin Percival <cperciva@FreeBSD.org>
Date: Wed, 7 Oct 2026 17:56:01 -0700
Subject: [PATCH] EC2: Align partitions to 1 MB boundaries

Reviewed by:	jlduran, imp
MFC after:	2 months
Sponsored by:	Amazon
Differential Revision:	https://reviews.freebsd.org/D60455
---
 release/tools/ec2.conf | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/release/tools/ec2.conf b/release/tools/ec2.conf
index dc1818219816..b6dbee3a3cad 100644
--- a/release/tools/ec2.conf
+++ b/release/tools/ec2.conf
@@ -20,6 +20,10 @@ export VMSIZE=8000m
 # and 4096 GB of RAM.
 export NOSWAP=YES
 
+# Align partitions to 1 MB boundaries; this is recommended by EC2 for
+# optimal EBS performance.
+export VM_PARTALIGN=1M
+
 ec2_common() {
 	if [ -z "${NO_ROOT}" ]; then
 		echo "ERROR: NO_ROOT not set" >&2