SW/openwrt
2
0
Fork 0
forked from Ivasoft/openwrt
Code Pull Requests Activity

kexec-tools: bump version and add support for crashdump kernel

Browse Source 
split kexec-tools into two packages, kexec and kdump.
* kexec to simply execute a new kernel
* kdump is for loading and collecting debris of a crashed kernel with
  support for kdump forensics.

In order to properly support booting into a crashkernel, an init script
as well as UCI configuration has been added.
As modifying the kernel cmdline is required for this to work in x86
platforms use an uci-defaults script to modify /boot/grub/grub.cfg.

To test collecting crash information, use the 'c' sysrq-trigger, ie.
echo c > /proc/sysrq-trigger

This should result in the crash kernel being executed and (depending
on the configution) dmesg and/or vmcore getting saved.

To check if the crash kernel was loaded properly, use the 'status'
command of the kdump init script.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle
2017-03-21 15:58:13 -06:00
parent 8b486ec2b5
commit 5e4bb476c0
5 changed files with 265 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
package/boot/kexec-tools/files/kdump.defaults Normal file
View File

@@ -0,0 +1,11 @@
#!/bin/sh
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
mount /boot -o remount,ro
fi
;;
esac