[virtualized]

I always wonder why Linux doesn't seem to have any kind of tests. How can they afford not to have regression tests for bugs they fixed? How do they know that this bug fix didn't break anything? What does "never break userspace" even mean if there is no way to check whether userspace has been broken?

[jibal]

https://stackoverflow.com/questions/3177338/how-is-the-linux...

[cosarara]

Never break userspace means that if you break userspace, that's a bug. The effort spent on preventing bugs is another matter.

[chronolitus]

I guess the user is the test.