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x86: make crashdump works

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1. KERNEL_CRASH_DUMP should depends on KERNEL_PROC_KCORE (kexec use it)
2. select crashkernel mem size by totalmem
   mem <= 256M disable crashkernel by default
   mem >= 4G use 256M for crashkernel
   mem >= 8G use 512M for crashkernel
   default use 128M
3. set BOOT_IMAGE in kdump.init
4. resolve a "Unhandled rela relocation: R_X86_64_PLT32" error

Tested on x86_64

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>
This commit is contained in:
Chen Minqiang
2019-07-11 22:34:03 +08:00
committed by Daniel Golle
parent ecef29b294
commit ec5e8461c1
4 changed files with 33 additions and 1 deletions
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14
package/boot/kexec-tools/files/kdump.defaults
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@@ -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
;;