[dgabriel]

Actually, Linus seems to be saying: we have tested the crap out of this, and the patch broke something, and instead of playing guessing games, revert to the thoroughly tested version and think more closely about the problem before you submit stuff that hasn't been tested on thousands of machines, and will likely break one of them (because you didn't understand the whole problem). This exchange doesn't really cast any light on whether you need less QA. Instead, it seems to say: we rely on past tests to benchmark quality.

I have had my own problems with incompetent QA "engineers," but I do think an excellent QA team helps create an excellent product.