[PATCH RHEL7.2 v3] kdumpctl: Add the command "kdumpctl showmem" to show the reserved memory
Resolves: bz1140774
https://bugzilla.redhat.com/show_bug.cgi?id=1140774
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>
Acked-by: Vivek Goyal <vgoyal(a)redhat.com>
Acked-by: Baoquan He <bhe(a)redhat.com>
---
kdumpctl | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/kdumpctl b/kdumpctl
index 5b2b3a3..029ded9 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -556,6 +556,14 @@ propagate_ssh_key()
fi
}
+show_reserved_mem()
+{
+ local mem=$(cat /sys/kernel/kexec_crash_size)
+ local mem_mb=$(expr $mem / 1024 / 1024)
+
+ echo "Reserved "$mem_mb"MB memory for crash kernel"
+}
+
is_fadump_capable()
{
# Check if firmware-assisted dump is enabled
@@ -967,8 +975,11 @@ 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
}
--
2.1.0