diff --git a/crashkernel/crashkernel.service b/crashkernel/crashkernel.service
index d5a944d..fc7ec4b 100644
--- a/crashkernel/crashkernel.service
+++ b/crashkernel/crashkernel.service
@@ -6,7 +6,7 @@ ConditionPathExists=/boot/bzImage.crash
 StandardOutput=kmsg
 StandardError=kmsg
 Type=oneshot
-ExecStart=/usr/sbin/kexec -p /boot/bzImage.crash --initrd=/boot/grub/initramfs.igz --command-line="root=LABEL=root ro console=ttyS1,115200n8 console=tty0 irqpoll maxcpus=1 reset_devices panic=5 CRASH"
+ExecStart=/usr/sbin/kexec -p /boot/bzImage.crash --initrd=/boot/grub/initramfs.igz --command-line="root=LABEL=root ro console=ttyS1,115200n8 console=tty0 irqpoll nr_cpus=1 reset_devices panic=5 CRASH"
 ExecStop=/usr/sbin/kexec -p -u
 RemainAfterExit=yes
 
diff --git a/mxgrub/mxgrub b/mxgrub/mxgrub
index 4d354c4..ec0f0be 100755
--- a/mxgrub/mxgrub
+++ b/mxgrub/mxgrub
@@ -239,7 +239,7 @@ sub scan_mariux {
 	}
 }
 
-our $KERNEL_PARAMETER="ro crashkernel=512M console=ttyS1,115200n8 console=tty0 init=/bin/systemd audit=0";
+our $KERNEL_PARAMETER="ro crashkernel=256M console=ttyS1,115200n8 console=tty0 init=/bin/systemd audit=0";
 
 sub update_grub_cfg {
 	my $kernellist='';