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

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] issues getting more than 16M ram to be used without oopsing. 1.2 and 1.3-unstable
From: "Brian Wolfe" <brianw@xxxxxxxxxxxx>
Date: Tue, 6 Apr 2004 10:04:44 -0500 (CDT)
Cc: "Brian Wolfe" <brianw@xxxxxxxxxxxx>, "Keir Fraser" <keir.fraser@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxxx
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Sounds great! I'll drop in the Intel then.

The latest fixes that you posted are still showing memory corruption
symptoms. Different point again, so the driver is probably just being
really naughty in how it's using things. 8-P

Since you will have the new IO layer soon I think it may be a good idea
for me to just dig out another card from my pile of parts (accumulation of
15 years of pc upgrades, repairs, etc on my own, and other people's
machines.)  If I tried, I think I could probably make a good 7 or 8
working machines from the pile. Is that scary or what? *grin*

Sounds like I'll have plenty of testing to do once the new IO layer is
released. Any information on the IDE subsystems in the new IO layer? I'd
love to see the same "drop in" capability for IDE drivers. Course with me
knowing very little about this level of things in driver land I may be
asking for the sun. Adam mentioned that the 1.2 version does IDE in a very
non-linux way.

I feel bad for having you spend a couple days chasing the 3com driver
around now. 8-/ Is there anything that I can provide that the xen team can
use? I'd like to see if there are any other ways that I can conribute with
my limited  amount of available time. I'll definitly be allocating some
time to testing various cards and systems once the new IO layer is

Brian Wolfe           | Phone 1-(214)-764-1204
President,            | Email  brianw@xxxxxxxxxxxx
TerraBox.com Inc.     |

pub  1024D/73C5A2DF 2003-03-18 Brian Wolfe <brianw@xxxxxxxxxxxx>
     Key fingerprint = 050E 5E3C CF65 4C1E A183  F48F E3E3 5B22 73C5 A2DF
sub  1024g/BB87A3DD 2003-03-18

Keir Fraser said:
>> 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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