Re: [PATCH 0/3] KVM: PPC: Book3S HV: More flexible allocator for linear memory

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On 14.09.2012, at 14:45, Paul Mackerras wrote:

> On Fri, Sep 14, 2012 at 02:13:37PM +0200, Alexander Graf wrote:
> 
>> So do you think it makes more sense to reimplement a large page allocator in KVM, as this patch set does, or improve CMA to get us really big chunks of linear memory?
>> 
>> Let's ask the Linux mm guys too :). Maybe they have an idea.
> 
> I asked the authors of CMA, and apparently it's not limited to
> MAX_ORDER as I feared.  It has the advantage that the memory can be
> used for other things such as page cache when it's not needed, but not
> for immovable allocations such as kmalloc.  I'm going to try it out.
> It will need a patch to increase the maximum alignment it allows.

Awesome. Thanks a lot. I'd really prefer if we can stick to generic Linux solutions rather than invent our own :).


Alex

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