Re: [Freemint-discuss] Food for thought: Linux Patches Allow Kernel Tracing To Work Past Reboots/Crashes

[Eero T. <oa...@he...>]

Hi,

On 12.3.2024 10.44, Thorsten Otto wrote:
> On Montag, 11. März 2024 21:15:42 CET Miro Kropáček wrote:
>> Having the insane (for Atari world) amounts of RAM in TT/CT60/V4S/Aranym,
>> this could work well on our systems, too:
>> https://www.phoronix.com/news/Linux-Tracing-Post-Reboots.

Long before that (by ~20 years), Linux kernels have had ability to dump 
similar things to a specific "oops" partition on the disk:
https://github.com/torvalds/linux/blob/master/drivers/mtd/mtdoops.c


> For aranym atleast, that wont work since the memory may already be cleared by
> the host. Also that assumes that we have some backtrace ability in the kernel,
> which isn't the case.

If you have backtrace ability, like Hatari debugger has (with symbols 
loaded and profiling enabled), one can just print the backtrace when 
things crash.  There's no need to reboot to working config and printing 
things from inside the emulation.

But on real HW, saving other things than backtrace (regs etc) to 
reboot-safe buffer might also be useful.


	- Eero