On Mon, Nov 09, 2020 at 11:49:46AM +0000, Aaron Sloman wrote:
> I had been running an old kernel (5.6.6) in order to be able to use ved as
> my main editor. It works in both 32bit and 64bit poplog.
>
> I wondered what would happen if I tried to run the old 32bit poplog in the
> latest (5.8) kernel. So I have just rebooted into fedora32 with kernel
>
> 5.8.11-200.fc32.x86_64
>
> and tried running both 32 bit and 64 bit poplog.
>
> The result seems to confirm Waldek's hypothesis about what's going on:
> Neither new nor old poplog will run: I just get a stream of error messages.
>
> ;;; MISHAP - ste: STACK EMPTY (missing argument? missing result?)
>
> (the first error message goes off the screen too fast, so I don't know
> how it starts).
This was expected but thanks for confirmation.
> I wonder if this is fixable, or whether the new kernel changes make poplog
> unusable.
>
> If a new test version of poplog becomes available I would be willing to try
> it, but I don't think I can do anything to help identify the details of
> the problem.
>
> I presume Linus Torvalds, or whoever has made this change would
> not be willing to provide a mechanism to enable self-modifying code, like
> Poplog's to be run.
>
> I wonder if there are any other systems that have been made unusable.
There is good chance that there is some configuration parameter to
enable old behaviour (to run programs like Poplog). Simply, ATM
we lack info. We do not know exact reason for fault. We do not
know if this is general 5.8 thing or (more likely) Fedora thing.
We do not know if this is really kernel change or say configuration
change that is somewhat tied to the kernel (say buch of configuration
changes with some dependent of kernel features).
To put it differently, most guesses about software problems are
wrong. Here there are several factors involved, so chance
of resolving problem without digging deeper is virtually 0.
--
Waldek Hebisch
