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[Xen-devel] [RFC] Cleaning up /proc/xen

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] [RFC] Cleaning up /proc/xen
From: Anthony Liguori <aliguori@xxxxxxxxxx>
Date: Wed, 07 Sep 2005 20:45:48 -0500
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Today, in /proc/xen we have:

/proc/xen/balloon - displays information about memory allocations and allows for ballooning by echoing a byte value into file

/proc/xen/privcmd - allows for userspace invocation of hypercalls and mapping of other domains memory

/proc/xen/grant - allows grant table operations to be accessed from userspace

/proc/xen/xenbus  -   allows xenbus to be accessed from userspace (in domUs)

I propose we do the following:

Change /proc/xen/{privcmd,grant,xenbus} to character devices (that use random major/minors; we'll always access them by name). We have a few options for /proc/xen/balloon. We could:

1) Get rid of it completely--not sure it's a good idea but it's been suggested since it's redundant (in dom0 at least).
2) Move it to /proc/sys/
3) Move it to /sys/xen

I'm partial to the last option (maybe even /sys/hypervisor/xen--that seems to compliment /sys/firmware).

Thoughts?

Regards,

Anthony Liguori

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