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RE: [Xen-devel] Some advice. VIO: netfront finally begun

To: "Jimi Xenidis" <jimix@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Some advice. VIO: netfront finally begun
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Mon, 21 Aug 2006 18:11:16 +0100
Cc: xen-ppc-devel <xen-ppc-devel@xxxxxxxxxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Some advice. VIO: netfront finally begun
> We use large pages, and in fact we are forced to a special area to
> handle real mode exceptions called an RMA.
> Consider it a permanent large page (64M) that is used for real mode,
> this is our minimum memory.
> In order to decrease a reservation that mean that memory must be
> greater than this minimum memory by at least as much as we want to
> decrease.  We also want to make sure that pages that are part of the
> decrease do not come from the RMA.
> 
> Any thoughts on this would be appreciated.
> Also, I know others are thinking about super-pages, any progress on
> that with regard to grant transfers?

You could use the copy mode of operation supported by netfront/back.

Ian

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