On Tue, Nov 29, 2016 at 11:39:35AM -0800, Paul E. McKenney wrote: > On Tue, Nov 29, 2016 at 06:10:38PM +0100, Peter Zijlstra wrote:
> > It mostly works, most of the time, and that seems to be what Linus > > wants, since its really the best we can have given the constraints. But > > for debugging, when you have a UART, it totally blows. > > UART??? They still make those things??? ;-) Yes, most computer like devices actually have them, trouble is, most consumer devices don't have the pins exposed. Luckily most server class hardware still does. And they're absolutely _awesome_ for debugging; getting data out is a matter of trivial MMIO poll loops. Rock solid stuff.
