WSLg update on 1-5-2021 - BSD / WSL

Daniel Nebdal dnebdal at
Sun May 9 03:56:21 UTC 2021

On Thu, 6 May 2021 at 19:05, David Chisnall <theraven at> wrote:
> [ Disclaimer: I work for Microsoft, but not on WSL and this is my own
> opinion ]
> (...)
> David

Just as a counterpoint to Rozhuk's take, that all sounds sensible
enough to me - FreeBSD would probably gain more from this than MS.

So the WSL2 TODO would be something like this:
* Ballooning driver. Seems like a proof of concept would be doable
enough - could you model it as an unkillable task (userland or kernel)
that wants to allocate a lot of memory, and anything it gets it hands
back to the host?
* Some sort of boot support. Maybe as a shim that chainloads an
unmodified kernel? Probably finicky, but also self-contained.
* File systems. Is / also 9p-over-HyperV-channels? If so that's kind
of crucial and perhaps the hardest part.

Oh, and how does the terminal work? You support multiple ttys, so I
guess it's not straight emulated serial?


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