[throwawayish]

I'm not aware of server or desktop OS that isn't generally vulnerable to local DoS.

[SixSigma]

https://en.wikipedia.org/wiki/Burroughs_large_systems

[dandelion_lover]

Qubes OS

[throwawayish]

As a Qubes user, no, not at all. It's fairly easy to starve other VMs of resources. Qubes is more vulnerable here than other systems, due to it's dynamic allocation of memory. A VM that has a no-matter-what fixed limit of say 2 GB RAM would have a harder time to cause trouble there, but the dynamic management done by Qubes is a major selling point, otherwise it wouldn't be really practical to use on mobile hardware (which is all the rage). I believe one can disable it on a per-VM basis though, so there's that.

[dandelion_lover]

As a Qubes OS user, yes, you can disable the dynamic memory allocation for chosen VMs. So I do not see the problem.

Upd: right click in Qubes Manager, VM settings, Advanced, Include in memory balancing, remove the tick.

And you can even choose how many CPU cores a VM can use.

[angry_octet]

OT: If you're averaging +24 karma per day from a throwaway account, maybe you don't need a throwaway?

[delta1]

That's why it's only throwaway"ish" ;)

[angry_octet]

Given how furiously the thought police react to an OT comment, or indeed any comment mentioning karma, I should have created a throwaway for that question... -4 jeez