Re: [Xen-devel] [RFC PATCH] ARM 32: Workaround for memory problem >1gb on last section

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hello Frediano,

On 29/09/2014 17:02, Frediano Ziglio wrote:
> setup_xenheap_mappings setup head memory on Arm 32 has a limit of 1GB.
> On system with large memory is possible that there are no blocks of memory
it's

> smaller than 1gb leading xenheap_pages to be more than 1gb.
Can you be consistent with the way to write 1GB?

> This cause memory errors trying to access heap after the 1gb limit.
>
> I actually consider this patch as RFC as the pages are allocated at the end
> of the block found however I don't think is safe to assume that the end is
> aligned to 32mb as required.
After Ian's comment, I guess this paragraph should be dropped.

> Signed-off-by: Frediano Ziglio <frediano.ziglio@xxxxxxxxxx>
> ---
>   xen/arch/arm/setup.c | 5 +++++
>   1 file changed, 5 insertions(+)
>
>
> diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
> index 446de8a..34b55b4 100644
> --- a/xen/arch/arm/setup.c
> +++ b/xen/arch/arm/setup.c
> @@ -524,6 +524,11 @@ static void __init setup_mm(unsigned long
> dtb_paddr, size_t dtb_size)
>       if ( ! e )
>           panic("Not not enough space for xenheap");
>
> +#ifdef CONFIG_ARM_32
This version of setup_mm is only compiled for arm32, therefore the 
#ifdef is not necessary.
Regards,


--
Julien Grall

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