Re: [Xen-devel] [PATCH 1/4] libxl: bump LIBXL_MAXMEM_CONSTANT to 2048

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Tue, Oct 15, 2013 at 5:40 PM, Wei Liu <wei.liu2@xxxxxxxxxx> wrote:
> When using OVMF we need to have 1MiB of memory in place for firmware.
> Without this change we have:
>
> (XEN) HVM128: Loading OVMF ...
> (XEN) page_alloc.c:1460:d128 Over-allocation for domain 128: 33025 > 33024
> (XEN) memory.c:132:d128 Could not allocate order=0 extent: id=128 memflags=0 
> (0 of 1)
>
> This is not a fatal error as hvmloader will instead use low memory to
> load OVMF, but it's better to eliminate such error.

Wait -- hvmloader is actually allocating memory from Xen to load
firmware stuff like this?

That seems a bit weird... shouldn't it just use the memory it already
has, instead of asking for more?

 -George

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