On 10/2/26 13:53, Lorenzo Stoakes (ARM) wrote: > On Fri, Oct 02, 2026 at 01:38:31PM +0200, Geert Uytterhoeven wrote: > >> On Fri, 2 Oct 2026 at 10:10, Lorenzo Stoakes (ARM) <[email protected]> wrote: > >>> But fork() -> -EINVAL or -ENOSYS = nommu, then just have the child quit and >>> etc. should do it. >> >> fork() is not strictly an MMU-feature (you can implement fork on nommu >> if all memory accesses are done relative to a base address register), >> while I think mprotect() is an MMU-feature. Unless it can also be used >> to change the protection using the one or two BARs most MCU haves? >> Anything else that is a real MMU-feature? Non-identity mmap()? > > Does any nommu arch implement fork() in linux?
I was about to say, that sounds a bit too theoretical for me. IIUC that is not implemented, and if someone would propose it we would likely just nak it. In the unlikely event that this would see the light of day, we could always change our detection in the selftests. -- Cheers, David
