Re: [PATCHv6 00/22] Transparent huge page cache: phase 1, everythingbut mmap()

[Andi Kleen]

On Mon, Sep 30, 2013 at 11:13:00AM +0100, Mel Gorman wrote:
> On Tue, Sep 24, 2013 at 04:49:50PM -0700, Andi Kleen wrote:
> > > Sigh.  A pox on whoever thought up huge pages. 
> > 
> > managing 1TB+ of memory in 4K chunks is just insane.
> > The question of larger pages is not "if", but only "when".
> > 
> 
> Remember that there are at least two separate issues there. One is the
> handling data in larger granularities than a 4K page and the second is
> the TLB, pagetable etc handling. They are not necessarily the same problem.

It's the same problem in the end.

The hardware is struggling with 4K pages too (both i and d)

I expect longer term TLB/page optimization to have far more important
than all this NUMA placement work that people spend so much
time on.


-Andi
-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only
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