kernel defconfig, debugging, preemption, and very noticeable speedups/ debugging

[Gennady Kupava]

werner,

thinking on this topic finally i've found right question to ask.

Can someone, you or any kernel maintainers provide which bug was closed
with help of any of debugging options under review enabled in user side?

This will be very helpful to evaluate how useful this information for us
now, than we have it enabled.

gennady.