Re: [Crash-utility] [RFC] autokdump - automated kdump testsuite
On Fri, Sep 19, 2014 at 05:52:25AM -0400, CAI Qian wrote:
I plan to release an automated kdump testsuite that will be
So will this be a standalone test suit? Can it be merged with
something already existing say, LTP.
focus on testing kernel and the crash utility. It should work
for all major distros since it will use none of distro-specific
stuff, and also support different arches including x86, ARM,
PPC64 and s390x.
It does the following:
1) check if there is a memory reserved for kdump. If not,
reserve the memory and reboot the system.
2) once the system is back, load kexec on panic and
prepare a separate initramfs that including needed
modules to load a local filesystem and necessary utilities
So you will write logic to prepare custom initramfs or will rely
on dracut or some other utility for that.
in order to analyse /proc/vmcore in the 2nd kernel.
3) trigger the system crash using methods like sysrq-c, NMI,
and panic_on_hung_task etc.
4) in the 2nd kernel, mount a filesystem and use the crash
utility to analyse /proc/vmcore. Then, gather the analyse
logs, serial console output, dmesg etc into the filesystem.
Why not save core and boot back in first kernel and then analyze.
Trying to work directly with /proc/vmcore does not test makedumfile
which everybody uses. Also it will require more memory to be reserved
and packing crash and debug vmlinux into initramfs.
I think being able to test makedumpfile also is the key here.
Thanks
Vivek
5) reboot back into the 1st kernel.
implementation:
It will setup a daemon to handle reboots.
plan:
I might also to test the makedumpfile all together later.
CAI Qian