diff --git a/kdump-lib.sh b/kdump-lib.sh
index 4290be3..16238c5 100755
--- a/kdump-lib.sh
+++ b/kdump-lib.sh
@@ -344,11 +344,24 @@ is_mount_in_dracut_args()
 	[[ " $(kdump_get_conf_val dracut_args)" =~ .*[[:space:]]--mount[=[:space:]].* ]]
 }
 
+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=$(< /sys/kernel/kexec_crash_size)
+	mem_reserved=$(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 7e561fd..1f7f4ce 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -856,7 +856,7 @@ show_reserved_mem()
 	local mem
 	local mem_mb
 
-	mem=$(< /sys/kernel/kexec_crash_size)
+	mem=$(get_reserved_mem_size)
 	mem_mb=$((mem / 1024 / 1024))
 
 	dinfo "Reserved ${mem_mb}MB memory for crash kernel"
@@ -1270,7 +1270,7 @@ do_estimate()
 	# The default pre-reserved crashkernel value
 	baseline_size=$((baseline * size_mb))
 	# Current reserved crashkernel size
-	reserved_size=$(< /sys/kernel/kexec_crash_size)
+	reserved_size=$(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))