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

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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
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7
package/boot/kexec-tools/files/kdump.config Normal file
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config kdump
option enabled '1'
option save_dmesg '1'
option save_vmcore '0'
# using an external partition to store vmcore is highly recommended!
# option path '/mnt/crashdump'