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Re: [Xen-devel] issues getting more than 16M ram to be used without oops

To: "Brian Wolfe" <brianw@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] issues getting more than 16M ram to be used without oopsing. 1.2 and 1.3-unstable
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 06 Apr 2004 15:44:31 +0100
Cc: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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> Would a decchip tulip card be a good choice for xen?  Digital Equipment
> Corporation DECchip 21140 [FasterNet] (rev 22).

Tulip is a good NIC design, and it can do full bus-mastering DMA.

It's not as well tested on Xen as some others, but should work just
fine. For reference, the NICs that we use are Broadcom tg3, Intel
e1000, and 3com 3c905. There are suspected issues with the tg3 driver
though (the same issues exist on native Linux also - the driver just
isn't fully mature yet).

> I also have a server class Intel ether card (not certain of the version,
> have to drop it in a system) that I can try on the server.

Intel e100 and e1000 should work just fine and give good performance.

> I do have a fairly large array of various low end network cards. I'll set
> aside some time to test what I can on the spare parts that I have. If I
> can manage more spare time I cna try to learn what needs to be done with
> the network stuff to make other cards from linux 2.4 work with Xen.

The new IO model will be unveiled in a short while. At that point
we hope that all Linux network and block-device drivers will work with
no modifications required. Fingers crossed. :-)

 -- Keir

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