From 05c48614438611b83033b382de391afd87c6bc5b Mon Sep 17 00:00:00 2001 From: Pingfan Liu Date: Tue, 13 Jun 2023 17:43:22 +0800 Subject: [PATCH] kdump-lib: add support for 64K aarch64 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 Reviewed-by: Coiby Xu Reviewed-by: Philipp Rudo --- kdump-lib.sh | 21 ++++++++++++++++++++- kdumpctl | 6 ++++-- 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/kdump-lib.sh b/kdump-lib.sh index 4f31b74..68431a0 100755 --- a/kdump-lib.sh +++ b/kdump-lib.sh @@ -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" diff --git a/kdumpctl b/kdumpctl index 5043a7b..827b595 100755 --- a/kdumpctl +++ b/kdumpctl @@ -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