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Re: [Xen-devel] Re: [RFC] [PATCH] sysfs support for Xen attributes

On 12 Jan 2006, at 15:14, Dave Hansen wrote:

This is a good set of questions. We have about half dozen files in
/proc/xen right now. One is an obvious canididate to stick in /dev, as
it has primarily an ioctl() interface.

Actually, anything with an ioctl interface is probably a good cantidate
for a writable sysfs file.  The basic idea is that we prefer something
in sysfs with a discrete, unique name. It also makes it a lot easier to
develop with because you can look at the values from scripts, and you
don't have to worry about synchronizing any headers.

So, what kind of ioctls are we talking about?

They are pretty low level. e.g., pass-thru a raw hypercall direct to xen, map another VM's pages into my address space (given a list of page frames), etc. very strongly binary, and unlikely to be useful for scripting.

 -- Keir

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