Re: [PATCH 0/3] Early use of boot service memory

[Vivek Goyal]

On Wed, Nov 13, 2013 at 02:49:42PM -0800, H. Peter Anvin wrote:

[..]
> In other words, allocating the crashkernel high has ALL the advantages,
> plus a few more, and NONE of the disadvantages.

It allocates low memory for swiotlb. So that extra 72M allocation is the
disadvantage. With so many virtual machines on a single host, I don't
want to reserve extra 72MB on each virtual machine while I could
easily do away with memory reservation below 4G. 

So I do think that first trying memory below 896M, then below 4G and then
above 4G makes sense and we should modify crashkernel=X to handle that.

Thanks
Vivek
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