Mailing List Archive: Shared memory

Sitting here with 2 Domains running on my desktop box thinking of all
the applications..
Now for the question. Having just installed and read the docs I
understand that domains are allocated a chunk of memory and for the
administrator to "balloon" or re allocate memory on the fly . This works
very well but it did occur to me that it might be useful to do some
memory QOS. Is this possible?
Dom 0 has a fixed 128MB
Dom 1 gets given a minimum of 128MB but can use all available [physical]
RAM if not in use by Dom 2 - Dom 9
If Dom 2 - Dom 9 need all their memory then Dom 1 is pulled back to
128Mb
regards
Robert Slater

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<snip, go straight to example>
> Dom 0 has a fixed 128MB
> Dom 1 gets given a minimum of 128MB but can use all available [physical]
> RAM if not in use by Dom 2 - Dom 9
> If Dom 2 - Dom 9 need all their memory then Dom 1 is pulled back to
> 128Mb

This will be done at some point. "Autoballooning" requires the guests to
report their current usage statistics back to dom0 (using the control
interface, which all guests have). We'd then have a daemon in dom0 that
would receive these messages and send ballooning messages periodically.

The daemon in dom0 could then be set up with some sort of policy
configuration, regarding minimum / maximum footprints, relative importance of
the domains, etc.

Right now it's probably on the TODO list somewhere, waiting for someone to
volunteer ;-)

Cheers,
Mark

> regards
> Robert Slater
>
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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