Re: [PATCH] Adding ctrl-o sysrq hack support to 8250 driver

[Daniel Jacobowitz <dan@debian.org>]

On Fri, Dec 09, 2005 at 03:05:59PM +0100, Olaf Hering wrote:
> 
> If you can queue this up in -mm for a decade or two, just to make sure
> it doesnt make some setup unhappy.
> 
> 
> a POWER4 system in 'full-system-partition' mode has the console device
> on ttyS0. But the user interface to the Linux system console may still
> be on the hardware management console (HMC). If this is the case, there
> is no way to send a break to trigger a sysrq.
> Other setups do already use 'ctrl o' to trigger sysrq. This includes iSeries
> virtual console on tty1, and pSeries LPAR console on hvc0 or hvsi0.
> 
> 'ctrl o' is currently mapped to 'flush output', see 'stty -a'

And... you're going to make it impossible to run ppp over the serial
console port.  For everyone, not just your big POWER4 boxes.  As far as
I know, if you turn off the printk log level, this should work just
fine today.

-- 
Daniel Jacobowitz
CodeSourcery, LLC