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@redhat.com Acked-by: Vivek Goyal vgoyal@redhat.com --- kdumpctl | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/kdumpctl b/kdumpctl index ca053a1..4f3c60d 100755 --- a/kdumpctl +++ b/kdumpctl @@ -551,6 +551,17 @@ propagate_ssh_key() fi }
+show_reserved_mem() +{ + local 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 @@ -924,8 +935,11 @@ 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 }