Re: [Xen-users] mem= not altering the total memory seen by Xen for ARM

[Julien Grall <julien.grall@xxxxxxx>]

On 09/08/2016 20:13, John Linn wrote:
> Hi,
Hello John,

> I’m a newer user of Xen on ARM working with the Xilinx MPSOC platform.
>  We want to restrict Xens available memory and the Xen command line
> seems to be easy answer.
>
>
>
> We see the command line show mem=1G from “xl info”, but the total_memory
> does not reflect what we set mem= to.
>
>
>
> Does this still work on ARM with device tree and we’re doing something
> wrong?
The 'mem' option has not been implemented on ARM for moment. I think it 
was assumed that the user could modify the device tree to limit the memory.
However, I know that sometimes it may be difficult to modify the device 
tree, so it might be a good idea to implement "mem".
The best place to limit the memory in Xen would be setup_mm. Feel free 
to ask questions.
Regards,

--
Julien Grall

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