RE: [Xen-devel] serial console & sysrq?

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> On Thursday 11 August 2005 05:16, Ian Pratt wrote:
> > > is there some way to trigger sysrq from the serial console in 
> > > xenlinux?  With native linux it works by sending a break + sysrq 
> > > letter, in xenlinux it doesn't work that way though ...
> >
> > I'm not entirely sure how 'break' is signalled from the UART. We'll 
> > certainly fail to pass it on through xen to Linux as 
> there's no side 
> > channel.
> 
> The hvc_console driver (used by kernels running on the 
> pSeries hypervisor) has a similar problem. ^O is used as the 
> break character there.

Seems reasonable. It would be good if someone could knock up a patch
that adds ^O sysrq support for xen console...

Ian

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