VFS is a good example of something that's hairy and easy to introduce regressions affecting everyone. That's why Al Viro dissects stuff in detail. Most regress

VFS is a good example of something that's hairy and easy to introduce regressions affecting everyone. That's why Al Viro dissects stuff in detail. Most regressions are introduced in hardware drivers and those are the largest part of the kernel and the part that sees most churn. It's great that we don't see more regressions, actually, though the Intel DRM drivers have gotten worse in quality over the last year.