On Tue, Nov 29, 2016 at 08:52:04PM +0100, Peter Zijlstra wrote:
> 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.
They very clearly need to bring the baud rate into the current millenium,
many tens of Mbaud at the -very- least.
Thanx, Paul
