[Xen-devel] PATCH: ability to send sysrqs to Linux domains

[Matthew B. <ma...@by...>]

Here's the promised patch against a recent 2.01 snapshot to allow you to 
send sysrqs to running Linux kernels.  I went with Keir's suggestion of 
adding a sub-reason code to the shutdown message with a 1-byte payload 
specifying which key was pressed.  Hope it's acceptable for the main 
tree; I will happily alter it to spec if any of the maintainers have 
suggestions for better structuring it.

It adds the CONFIG_MAGIC_SYSRQ option to the Linux kernel which you need 
to turn on for a guest to work with it, then you can just do e.g. "xm 
sysrq domainname s" to sync your discs.

cheers,

-- 
Matthew Bloch                             Bytemark Hosting
                                 http://www.bytemark.co.uk/
                 phone UK: 0845 004 3 004 US: 1-877 BYTEMAR
           Dedicated Linux hosts from 15ukp ($26) per month