Linked by Peter Gerdes on Mon 10th Jan 2005 17:35 UTC
Editorial As a recent ACM Queue article observes the evolution of computer language is toward later and later binding and evaluation. So while one might quibble about the virtues of Java or the CLI (also known as microsoft.net) it seems inevitable that more and more software will be written for or at least compiled to virtual machines. While this trend has many virtues, not the least of which is compatibility, current implementations have several drawbacks. However, by cleverly incorporating these features into the OS, or at least including support for them, we can overcome these limitations and in some cases even turn them into strengths.
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Managed Kernel
by PlatformAgnostic on Tue 11th Jan 2005 23:34 UTC

JITs and VMs are system-level software. There's no getting around that. Application programmers have to rely on them doing their job accurately. Given the stability requirements for VMs, one has to assume that their code is very good and their bugs are few and far between. If so, why not push all of this code into the kernel? Eliminating user-mode entirely can speed up programs because all hardware accesses can be direct calls without the costly stack switch and access checks involved in a kernel-user transition.