diff --git a/kdump-lib.sh b/kdump-lib.sh
index 4abef85..24c3e63 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -529,11 +529,24 @@ get_dracut_args_target()
     echo $1 | grep "\-\-mount" | sed "s/.*--mount .\(.*\)/\1/" | cut -d' ' -f1
 }
 
+get_reserved_mem_size()
+{
+	local reserved_mem_size=0
+
+	if is_fadump_capable; then
+		reserved_mem_size=$(< /sys/kernel/fadump/mem_reserved)
+	else
+		reserved_mem_size=$(< /sys/kernel/kexec_crash_size)
+	fi
+
+	echo "$reserved_mem_size"
+}
+
 check_crash_mem_reserved()
 {
     local mem_reserved
 
-    mem_reserved=$(cat /sys/kernel/kexec_crash_size)
+    mem_reserved=$(get_reserved_mem_size)
     if [ $mem_reserved -eq 0 ]; then
         derror "No memory reserved for crash kernel"
         return 1
diff --git a/kdumpctl b/kdumpctl
index ba32806..81ba259 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -848,7 +848,7 @@ propagate_ssh_key()
 
 show_reserved_mem()
 {
-    local mem=$(cat /sys/kernel/kexec_crash_size)
+    local mem=$(get_reserved_mem_size)
     local mem_mb=$(expr $mem / 1024 / 1024)
 
     dinfo "Reserved "$mem_mb"MB memory for crash kernel"
@@ -1270,7 +1270,7 @@ do_estimate() {
 	# The default value when using crashkernel=auto
 	baseline_size=$((baseline * size_mb))
 	# Current reserved crashkernel size
-	reserved_size=$(cat /sys/kernel/kexec_crash_size)
+	reserved_size=$(get_reserved_mem_size)
 	# A pre-estimated value for userspace usage and kernel
 	# runtime allocation, 64M should good for most cases
 	runtime_size=$((64 * size_mb))