rpms/kexec-tools
7
0
Fork 0
Code Issues Pull Requests Releases Activity

kdump-lib: add support for 64K aarch64

Browse Source 
On aarch64, both 4K and 64K kernel can be installed, while they demand
different size reserved memory for kdump kernel.

'get_conf PAGE_SIZE' can not work if installing a 64K kernel when
running a 4K kernel. Hence resorting to the kernel release naming rules.
At present, the 64K kernel has the keyword '64k' in its suffix.

The base line for 64K is decided based on 4K. The diff 100M is picked up
since on a high end machine without smmu enabled, the diff of MemFree is
82M.

As for the smmu case, a huge difference in the memory consumption lies
between 64k and 4k driver. And it should be calculated separatedly.

Signed-off-by: Pingfan Liu <piliu@redhat.com>
Reviewed-by: Coiby Xu <coxu@redhat.com>
Reviewed-by: Philipp Rudo <prudo@redhat.com>
This commit is contained in:
Pingfan Liu 2023-06-13 17:43:22 +08:00 committed by Coiby Xu
parent d8b961be37
commit 05c4861443
2 changed files with 24 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
kdump-lib.sh
View File

@ -889,6 +889,7 @@ _crashkernel_add()
# get default crashkernel
# $1 dump mode, if not specified, dump_mode will be judged by is_fadump_capable
# $2 kernel-release, if not specified, got by _get_kdump_kernel_version
kdump_get_arch_recommend_crashkernel()
{
local _arch _ck_cmdline _dump_mode
@ -908,8 +909,26 @@ 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
# For 4KB page size, the formula is based on x86 plus extra = 64M
local _running_kernel
local _delta=0
# Base line for 4K variant kernel. The formula is based on x86 plus extra = 64M
_ck_cmdline="1G-4G:256M,4G-64G:320M,64G-:576M"
if [[ -z "$2" ]]; then
_running_kernel=$(_get_kdump_kernel_version)
else
_running_kernel=$2
fi
# the naming convention of 64k variant suffixes with +64k, e.g. "vmlinuz-5.14.0-312.el9.aarch64+64k"
if echo "$_running_kernel" | grep -q 64k; then
# Without smmu, the diff of MemFree between 4K and 64K measured on a high end aarch64 machine is 82M.
# Picking up 100M to cover this diff. And finally, we have "1G-4G:356M;4G-64G:420M;64G-:676M"
((_delta += 100))
else
((_delta += 0))
fi
_ck_cmdline=$(_crashkernel_add "$_ck_cmdline" "$_delta")
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"

6
kdumpctl
View File

@ -1678,12 +1678,14 @@ _is_bootloader_installed()
_update_crashkernel()
{
local _kernel _dump_mode _old_default_crashkernel _new_default_crashkernel _fadump_val _msg
local _kernel _kver _dump_mode _old_default_crashkernel _new_default_crashkernel _fadump_val _msg
_kernel=$1
_dump_mode=$(get_dump_mode_by_kernel "$_kernel")
_old_default_crashkernel=$(get_grub_kernel_boot_parameter "$_kernel" crashkernel)
_new_default_crashkernel=$(kdump_get_arch_recommend_crashkernel "$_dump_mode")
_kver=$(parse_kver_from_path "$_kernel")
# The second argument is for the case of aarch64, where installing a 64k variant on a 4k kernel, or vice versa
_new_default_crashkernel=$(kdump_get_arch_recommend_crashkernel "$_dump_mode" "$_kver")
if [[ $_old_default_crashkernel != "$_new_default_crashkernel" ]]; then
_fadump_val=$(get_grub_kernel_boot_parameter "$_kernel" fadump)
if _update_kernel_cmdline "$_kernel" "$_new_default_crashkernel" "$_dump_mode" "$_fadump_val"; then