From a3181169cd15ae1c342be88975e836b4908c13cf Mon Sep 17 00:00:00 2001
From: Pingfan Liu <piliu@redhat.com>
Date: Jun 15 2022 03:35:06 +0000
Subject: crashkernel: optimize arm64 reserved size if PAGE_SIZE=4k


Resolves: bz2041729
Upstream: Fedora
Conflict: None

commit b92bc6e0a775255e545506cedfa6946a1a104eff
Author: Pingfan Liu <piliu@redhat.com>
Date:   Mon Jun 13 10:25:26 2022 +0800

    crashkernel: optimize arm64 reserved size if PAGE_SIZE=4k

    On RHEL9 and Fedora, the arm64 platform only supports 4KB page size.
    the reserved memory size can be aligned to that on x86_64.

    Introducing a new formula for 4KB on arm64, which bases on x86_64 plus
    extra 64MB.

    Signed-off-by: Pingfan Liu <piliu@redhat.com>
    Acked-by: Baoquan He <bhe@redhat.com>

Signed-off-by: Pingfan Liu <piliu@redhat.com>

---

diff --git a/kdump-lib.sh b/kdump-lib.sh
index 1146ff5..2442ab7 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -850,7 +850,8 @@ kdump_get_arch_recommend_crashkernel()
 	if [[ $_arch == "x86_64" ]] || [[ $_arch == "s390x" ]]; then
 		_ck_cmdline="1G-4G:192M,4G-64G:256M,64G-:512M"
 	elif [[ $_arch == "aarch64" ]]; then
-		_ck_cmdline="2G-:448M"
+		# For 4KB page size, the formula is based on x86 plus extra = 64M
+		_ck_cmdline="1G-4G:256M,4G-64G:320M,64G-:576M"
 	elif [[ $_arch == "ppc64le" ]]; then
 		if [[ $_dump_mode == "fadump" ]]; then
 			_ck_cmdline="4G-16G:768M,16G-64G:1G,64G-128G:2G,128G-1T:4G,1T-2T:6G,2T-4T:12G,4T-8T:20G,8T-16T:36G,16T-32T:64G,32T-64T:128G,64T-:180G"