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SubjectRe: [PATCH] Factor in buddy allocator alignment requirements in node memory alignment
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On Mon, 2005-05-16 at 12:55 -0700, christoph wrote:
> On Mon, 16 May 2005, Dave Hansen wrote:
> > > Because the buddy allocator is complaining about wrongly allocated zones!
> >
> > Just because it complains doesn't mean that anything is actually
> > wrong :)
> >
> > Do you know which pieces of code actually break if the alignment doesn't
> > meet what that warning says?
>
> I have seen nothing break but 4 MB allocations f.e. will not be allocated
> on a 4MB boundary with a 2 MB zone alignment. The page allocator always
> returnes properly aligned pages but 4MB allocations are an exception?

I wasn't aware there was an alignment exception in the allocator for 4MB
pages. Could you provide some examples?

-- Dave

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