This helper function will be used to retrieve the value of kernel cmdline parameters including crashkernel, fadump, swiotlb and etc.
Suggested-by: Philipp Rudo prudo@redhat.com Signed-off-by: Coiby Xu coxu@redhat.com --- kdumpctl | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/kdumpctl b/kdumpctl index 9ec3f10f..f4ff457a 100755 --- a/kdumpctl +++ b/kdumpctl @@ -1306,6 +1306,17 @@ get_default_crashkernel() kdump_get_arch_recommend_crashkernel "$_dump_mode" }
+# Read kernel cmdline parameter for a specific kernel +# $1: kernel path, DEFAULT or kernel path, ALL not accepted +# $2: kernel cmldine parameter +get_grub_kernel_boot_parameter() +{ + local _kernel_path=$1 _para=$2 + + [[ $_kernel_path == ALL ]] && derror "kernel_path=ALL invalid for get_grub_kernel_boot_parameter" && return 1 + grubby --info="$_kernel_path" | sed -En -e "/^args=.*$/{s/^.*(\s|")${_para}=(\S*).*"$/\2/p;q}" +} + reset_crashkernel() { local kernel=$1 entry crashkernel_default