Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7

[Christoph Lameter]

On Wed, 7 Dec 2016, Mel Gorman wrote:

> Which is related to the fundamentals of fragmentation control in
> general. At some point there will have to be a revisit to get back to
> the type of reliability that existed in 3.0-era without the massive
> overhead it incurred. As stated before, I agree it's important but
> outside the scope of this patch.

What reliability issues are there? 3.X kernels were better in what
way? Which overhead are we talking about?

Fragmentation has been a problem for a long time and the issue gets worse
as memory sizes increase, the hardware improves and the expectations on
throughput and reliability increase.