alt Hacker NewsI know is a naive question, but it's genuine!
Is this the direct result of a monolithic kernel? And would moving more drivers out-of-tree mitigate this?
Replies
There are numerous advantages of microkernels over monoliths, but even if Linux were a microkernel it wouldn't necessarily change the review pressure that the above commenter is talking about, because you still have the same number of components (filesystem, networking, drivers, etc) to develop and review patches for (although you do have more well-defined interfaces between components, which eases security).
Not really - it changes how the lines are drawn between components, rather than removing any of them.
The EXT4 filesystem driver as an example contains most of the same code whether it is part of the kernel process or is a user process. A virtual filesystem abstraction is needed between the two in either case as well.
The kernel also already has a module system to support loading externally maintained code. You won't necessarily see a benefit from separately maintained drivers that wouldn't already be present.
The kernel has many different subsystems and the subsystems have their own maintainers and mailing lists.