Re: [Xen-devel] Need help with qemu args debug

[Fantu <fantonifabio@xxxxxxxxxx>]

Fantu wrote
> 
> 
> Ian Campbell-10 wrote
>> 
>> On Thu, 2012-03-01 at 09:18 +0000, Fantu wrote:
>>> Stefano Stabellini-3 wrote
>>> > 
>>> > Try adding videoram=32 to the VM config file, I think the issue is
>>> that
>>> > the default videoram size for QXL is much larger (32MB) than the
>>> default
>>> > videoram size for Cirrus (8MB).
>>> > 
>>> 
>>> Minimum setting of the ram was 16 mb, I applied this patch for decrese
>>> minimum to 4 mb:
>>> http://git.qemu.org/?p=qemu.git;a=commit;h=80105bbfb2aa3023e959b6ea682a3fc9515080a3
>>> And retry with -global qxl-vga.vram_size=4194304 (4 MB) but give same
>>> error
>>> /var/log/xen/qemu-dm-PRECISEHVM.log
>>> do_spice_init: starting 0.10.1
>>> spice_server_add_interface: SPICE_INTERFACE_MIGRATION
>>> spice_server_add_interface: SPICE_INTERFACE_KEYBOARD
>>> spice_server_add_interface: SPICE_INTERFACE_MOUSE
>>> qemu: hardware error: xen: failed to populate ram at 40000000
>> 
>> I think you'll need to dig into the qemu code and find out where/why
>> this message is coming from.
>> 
>>> 
>>> Tried to change minimum patch and setting to 3 MB but always same
>>> result,
>>> probably samething to change about xen for support qxl graphic and
>>> assignment of its ram?
>>> I do not know how to fix or what else to try now :(
>> 
> 
> I do other search about xen limit of video ram and found old patch about
> limit of qemu video ram size, is probably something about...
> http://xen.1045712.n5.nabble.com/PATCH-ioemu-drop-unused-4MB-video-memory-td2487287.html
> I do search on new tree but not found for now on where is xen limit of
> video ram allocation, someone can help me please?
> 
Found videoram setting on xl with grep of video_memkb but not about bios
and/or xen videoram limit on source code.
Is absolutely necessary be able to have the possibility of more video ram
for start to have good multimedia domU (at least for work) with xen and
without gfx-passtrought, spice and qxl seem to be seem to be a good
opportunity.

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