Lann Martin (Nov 02 2025 at 12:18): Lann Martin (Nov 02 2025 at 12:18):https://lore.kernel.org/lkml/618f3602-03aa-46a8-b2d4-3c9798c4cd2b@icemanor.se/
Port of Linux to WebAssembly
Victor Adossi (Nov 05 2025 at 16:55):A bit late but in that same space for anyone who is interested, but I was wondering how different this would be from compiling user mode linux to WebAssembly:
https://popovicu.com/posts/linux-vm-without-vm-software-user-mode/
Feels like a similar but distinct direction
bjorn3 (Nov 05 2025 at 19:45):UML needs ptrace and mmap support, which wasm doesn't have.
Victor Adossi (Nov 06 2025 at 02:43):They could probably be stubbed or replaced, right? There has certainly been some discussion about mmap like interfaces (though none that I know of for something like ptrace)
Chris Fallin (Nov 06 2025 at 03:01):Right, the Linux kernel in this demo is built with NOMMU per the notes at https://joelseverin.github.io/linux-wasm/. I suspect that the "memory control" proposal wouldn't be detailed enough for the page-by-page support plus the "address space switching" that the kernel would expect in a normal MMU configuration, but in theory one could design a followup that would do that. Likewise proper thread suspension/preemption could probably be built as a proposal on top of continuations plus shared-everything threads, somehow (handwave...). It's a fantastically cool technology demo regardless!
Last updated: Dec 06 2025 at 05:03 UTC