Re: [Xen-devel] [Xen-users] DomU sees only 512MB RAM with PCI-passthrough

[Christian Holpert <christian@xxxxxxxxxx>]

At 13:13 25.05.2013, Konrad Rzeszutek Wilk wrote:
> Please don't drop the xen-devel from the email. I am putting it back.
OK.

> > as written before: your patch is not working for me.
>
> I must have missed your previous email. When did you send it?
http://www.gossamer-threads.com/lists/xen/users/283697#283697

> > Even worse: when I create the domU it simply dies before running 
> the kernel.
> How so? Can you get the console output if you boot it with 'earlyprintk=xen"
How do I do that exactly?

> Hm, the E820 with 512MB looks to be the same as you posted earlier.
> Are you sure you are using the same exact kernel you did last time?
I did some more tests:

With your patch I can boot a 32bit domU (dom0 is 64bit) with 512MB. 
Any more will silently crash as described.
xl dmesg shows (last lines):
(XEN) mm.c:864:d8 Non-privileged (8) attempt to map I/O space 00020000
(XEN) mm.c:5317:d8 ptwr_emulate: could not get_page_from_l1e()

I can boot a 64bit domU with 2GB of RAM without problems with your 
patch and PCI is working. Just tried that out. I might be going to 
64bit for my dom0 and have that solved for me.
Christian


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