Re: [RFC][PATCH 0/7] re-shrink 'struct page' when SLUB is on.

[Dave Hansen]

On 12/18/2013 04:41 PM, Andrew Morton wrote:
>> > Unless somebody can find some holes in this, I think we have no choice
>> > but to unset the HAVE_ALIGNED_STRUCT_PAGE config option and revert using
>> > the cmpxchg, at least for now.
>
> So your scary patch series which shrinks struct page while retaining
> the cmpxchg_double() might reclaim most of this loss?

That's what I'll test next, but I hope so.

The config tweak is important because it shows a low-risk way to get a
small 'struct page', plus get back some performance that we lost and
evidently never noticed.  A distro that was nearing a release might want
to go with this, for instance.
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