Re: X11 on intel

[Roger Pau Monné <roger.pau%citrix.com@localhost>]

El 01/10/15 a les 11.28, Cherry G.Mathew ha escrit:
>>>>>> "Jean-Yves" == Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost> writes:
> 
>     Jean-Yves> Le 2015-09-25 11:23, Cherry G. Mathew a écrit :
>     >> On 25 September 2015 at 13:01, Robert Swindells <rjs%fdy2.co.uk@localhost> wrote:
>     >>> 
>     >>> There isn't currently a way of getting accelerated X11 in a Xen
>     >>> DOM0 for Intel GPUs. There is PR #49330 basically on this.
>     >>> 
>     >> I'm working on this (see previous email) - my patches would work
>     >> on a machine with RAM <= the dma maximum, but as Manuel pointed
>     >> out, our uvm and drm infrastructure itself needs changes to do
>     >> this properly.
>     >> 
>     >> I really need testing on those patches (which will most certainly
>     >> panic()/corrupt memory on a >4GB RAM modern machine), but I need
>     >> to see multiple crashes to help chase a few dangling pointers I
>     >> haven't got yet.
> 
>     Jean-Yves> Any reliable way to be sure that pages are allocated in
>     Jean-Yves> +4GiB region?  
> 
> Actually no - that was Manuel's point - so short of pulling out your RAM
> until you get 4GB (I don't know if there's a way to limit xen itself to
> 4GB), my patches won't work in any way.

You can use the 'mem' Xen command line parameter:

http://xenbits.xenproject.org/docs/unstable/misc/xen-command-line.html

mem=4G should limit the memory seen by Xen to 4GB.

Roger.