Re: [PATCH 1/3] ring-buffer: Add uname to match criteria for persistent ring buffer

[Linus Torvalds]

On Tue, 17 Dec 2024 at 10:42, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
>
> My initial suggestion was to just fix up the boot time array.
>
> I think that's actually wrong. Just print the raw data and analyze it
> in user space.

.. I still think it's not the optimal solution, but fixing up the
event data from the previous boot (*before* printing it, and entirely
independently of vsnprintf()) would at least avoid the whole "mess
with vsnprintf and switch the format string around as you are trying
to walk the va_list in sync".

Because that was really a non-starter. Both the format string hackery
and the va_list hackery was just fundamentally bogus.

If you massage the data before printing - and independently of it -
those two issues should at least go away.

             Linus