The search for the correct amount of split-lock misery

> The purpose of the kernel is to serve userspace, not to tell userspace what to do.

No, the purpose of the kernel is to protect userspace from each other (some single application systems don't even have a kernel)

> If userspace wants to hurt its own performance, that's the sysadmin's* problem.

Default settings matter A LOT and it's really good to see overbusy maintainers spending so much time discussing and getting them right.

> > Affected gamers will have to set the new knob appropriately, but knowing which sysctls to tweak could be said to be part of being a true God of War.

Happy ending:
- The "bug" will not go unnoticed and new applications will avoid it
- Old applications will run too after a few minutes searching the Internet.

Very delicate trade-off perfectly found.