Re: [RFC PATCH 3/6] mm: nommu: fix an issue on map request to /dev/zero

HI Lorenzo,

On Thu, 13 Aug 2026 at 22:30, Lorenzo Stoakes (ARM) <[email protected]> wrote:
> > One of the big problems for nommu seems to be that everyone is
> > convinced it is completely unused and totally broken. :)
>
> No, the issue is that nobody seems to do any testing or contribute any code
> aside from at least Hajime (thanks Haijme :), and possibly others (forgive me if
> I am missing people's names here!)

> There's been situtions where nommu has been broken for a year and _nobody
> noticed_.
>
> And yet whenever nommu comes up people always seem to pop up and say how
> important it is, then mention a talk etc.

It also broke sometime around LPC 2025, I spotted it, reported it..
and told the people in the room at LPC for the nommu talk that it was
borken and maybe they should take a look. :)
I think I maybe even told Tazaki-san in person that it was currently
broken in the hall outside of the session.

> Well if it's important, test it. Test the tip kernel. Report bugs. Contribute
> code. Any or all of it :)

I rebase my 68000 tree on mainline regularly and make sure it still
works. That's how I noticed and reported the above bug.
I have a bunch of stuff that claude fable found, validated with QEMU
and then I checked on real hardware but I'm not sure how to send that
without it getting instantly marked as slop. :(

Cheers,

Daniel