x86: make crashdump works

[openwrt/staging/wigyori.git] / package / boot / kexec-tools / files / kdump.defaults

diff --git a/package/boot/kexec-tools/files/kdump.defaults b/package/boot/kexec-tools/files/kdump.defaults
index 2f15e757bfebbedb9e9b5362ff4b5c04591632b3..62366a295039b38ca063903f69a1a5341475a0e2 100644 (file)
--- a/package/boot/kexec-tools/files/kdump.defaults
+++ b/package/boot/kexec-tools/files/kdump.defaults
@@ -1,10 +1,22 @@
 #!/bin/sh
 
+# kB disable if mem low than 256MB
+memtotal=`grep MemTotal /proc/meminfo | awk '{print $2}'`
+if test $memtotal -le 262144; then
+       exit 0
+fi
+KZ=128
+if test $memtotal -ge 8388608; then
+       KZ=512
+elif test $memtotal -ge 4194304; then
+       KZ=256
+fi
+
 case $(uname -m) in
        i?86|x86_64)
                if ! grep -q crashkernel /boot/grub/grub.cfg; then
                        mount /boot -o remount,rw
-                       sed -i 's/linux.*/& crashkernel=32M@32M/' /boot/grub/grub.cfg
+                       sed -i "s/linux.*/& crashkernel=${KZ}M/" /boot/grub/grub.cfg
                        mount /boot -o remount,ro
                fi
                ;;