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

[Hollis Blanchard <hollisb@xxxxxxxxxx>]

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.

-- 
Hollis Blanchard
IBM Linux Technology Center

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