Re: Linus replies. Re: Computer: Can We Make Operating Systems Reliable and Secure?// SAS

[Jonathan S. Shapiro]

On Thu, 2006-05-11 at 21:21 +0200, Niklas Klügel wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> >
> 
> > Consider:
> >
> > 1. The measured performance of the best JVM sucks. 2. There is no
> > possibility of hard real-time in a garbage-collected runtime. 3.
> > The amount of code needed to implement a decent JVM (or similar
> > system) is approximately 10x the amount of code needed to implement
> > a protected microkernel.
> >
> that was not my point. it was an example that software-based
> memory protection is already practicable at acceptable costs.

Perhaps acceptable costs to you, but not at acceptable robustness or
acceptable performance, or acceptable memory footprint for most
applications.

I approve of safe programming languages (which doesn't necessarily
require a JVM). I just think that they aren't a complete solution by
themselves.

shap