The search for the correct amount of split-lock misery

> The hope was that the warn mode would be sufficient to alert users to the problem, and lead to software being fixed, while [...]. By the time the 5.19 development cycle came around earlier this year, though, it seemed that little progress toward the removal of split lock operations had been made, and the denial-of-service problem was as present as before.

Wait, how does anyone know the warning had no effect? When we spot a warning and try to address it we don't tell anyone and AFAIK the kernel has no telemetry feature yet.