Re: [RFC 1/2] Protect larger order pages from breaking up

On Fri, 16 Feb 2018, Andi Kleen wrote:

quoted

First performance tests in a virtual enviroment show
a hackbench improvement by 6% just by increasing
the page size used by the page allocator to order 3.

So why is hackbench improving? Is that just for kernel stacks?

Less stack overhead. The large the page size the less metadata need to be
handled. The freelists get larger and the chance of hitting the per cpu
freelist increases.

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