If the grub kernel commandline is set to crashkernel=auto, it will not
expand the crashkernel=auto in the /proc/cmdline. It still says
crashkernel=auto.
Using /sys to determines crashkernel actual size is confusing since
there is no unit of measure.
Add a new command "kdumpctl showmem" to show the reserved memory kindly.
Signed-off-by: Minfei Huang <mhuang(a)redhat.com>
---
kdumpctl | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/kdumpctl b/kdumpctl
index 70d30fa..6f27669 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -526,6 +526,17 @@ propagate_ssh_key()
fi
}
+show_reserved_mem()
+{
+ MEM_RESERVED=$(cat /sys/kernel/kexec_crash_size)
+ if [ $MEM_RESERVED -eq 0 ]
+ then
+ echo "No memory reserved for crash kernel."
+ return
+ fi
+ echo "The kdump service reserved memory is `expr $MEM_RESERVED / 1024 /
1024`MB"
+}
+
is_fadump_capable()
{
# Check if firmware-assisted dump is enabled
@@ -899,8 +910,11 @@ main ()
propagate)
propagate_ssh_key
;;
+ showmem)
+ show_reserved_mem
+ ;;
*)
- echo $"Usage: $0 {start|stop|status|restart|propagate}"
+ echo $"Usage: $0 {start|stop|status|restart|propagate|showmem}"
exit 1
esac
}
--
1.8.3.1