Re: [RFC][PATCH 0/8] Speculative pagefault -v3

[KAMEZAWA Hiroyuki]

On Mon, 4 Jan 2010 15:59:45 -0600 (CST)
Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx> wrote:

> On Mon, 4 Jan 2010, Rik van Riel wrote:
> 
> > Fun, but why do we need this?
> >
> > What improvements did you measure?
> 
> If it measures up to Kame-sans approach then the possible pagefault rate
> will at least double ...
> 
On 4-core/2 socket machine ;)

More than page fault rate, important fact is that we can reduce cache contention
by skipping mmap_sem in some situation.

And I think we have some chances.

Thanks,
-Kame

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