Hi On Thu, Oct 16, 2014 at 4:57 AM, Leonidas Spyropoulos <artafinde@gmail.com> wrote:
Hello list,
I'm experiencing an issue while compiling big projects (i.e. linux kernel but not limited to that). The issue seems to be related to CPUFREQ and I'm trying to track it down.
While compiling the linux-ck kernel the kernel panics and produce a core dumps.
When you say "produce a core dumps" what exactly you see. How do you know it produces the kernel dump?
I'm trying to get the core dump but I'm not able to access it after hard reset. I tried enabling journalctl Storage=Auto to write to disk without luck.
After the crash happens kernel cannot write anything to disk nor send via network. Dealing with disk/network/... requires valid kernel data structures and you don't have them anymore. Once kernel crashed it has only one option - reboot.
My FS is btrfs and the CPU is AMD FX-8120. The CPU is not overclocked [1] and the Cool And Quiet is enabled alond with other power saving options in BIOS (like C6 State).
How can I access the kernel core dump after crash?
Check kdump https://wiki.archlinux.org/index.php/Kdump - it is probably what you are looking for.