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Re: [Xen-devel] [PATCH] xen-2.0: privileged port connections

To: Kurt Garloff <garloff@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH] xen-2.0: privileged port connections
From: Anthony Liguori <aliguori@xxxxxxxxxx>
Date: Wed, 23 Mar 2005 11:45:24 -0600
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
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Kurt Garloff wrote:

Oh, that's what I was planning to do. The privileged ports are less
scarce than the 4GB of memory that Xen-2 supports ...
We'll hardly get running more than 64 virtual machines, I'd guess.
Maybe not the typical desktop user but that's definitely not going to be the case for the enterprise user. I do a lot of testing with small domUs and I routinely have 40+ domains running (16MB a piece) on my 1GB laptop.

On a 4GB system, with NFS in the picture, you could pretty easily exhaust the privileged ports with domains using between 32-64MB of memory (which is a pretty reasonable amount to allocate). Throw in PAE support and you'll run out quickly.

Would a patch to change Xend to use pty's for consoles be accepted? xm console can be invoked via ssh to support remote consoles..

Any insight what we could do there?
I hate to beat a dead horse, but domain sockets seem like the obvious thing to do. We don't need different privilege levels there so that seems like the thing to do.

Regards,Anthony Liguori

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