The real realtime preemption end game

Windows drivers are much more resilient than the drivers in Linux. A surprising amount of functionality remains working in Windows even if half the kernel is going haywire.

In particular, modesetting and simple framebuffer access have always been a part of the kernel driver. And each driver is also responsible for pre-allocating its object pools, so there's much less dependency on memory allocation. The IRQL system also has a side effect of forcing driver writers to avoid putting anything too involved inside the critical pathways.