[seL4] Re: Question about LionsOS

On 4/18/24 07:12, Gernot Heiser via Devel wrote:

On 18 Apr 2024, at 20:38, Hugo V.C. wrote:

The challenge that I probably didn't expressed correctly, is to integrate seL4 on top of other dynamic systems (in example to virtualize a browser), as seL4 needs to know in advance how much memory will have available... Running seL4 on bare metal is a "kids game" (don't want to offend anyone), the challenge is to integrate it on systems where resources are dynamically assigned.

I don’t think I understand. Running seL4 in any way other than on bare metal makes no sense whatsoever.

Gernot

I think the point is that if a system needs dynamic resource allocation, _something_ needs to do it. Traditional systems do this in the kernel. seL4 declares this to be the responsibility of userspace, but I’m not aware of a userspace component that can actually do that job. Also, running seL4 in a virtualized environment makes a huge amount of sense for testing and debugging, or if one is shipping a virtual appliance. -- Sincerely, Demi Marie Obenour (she/her/hers)