Evgeniy Polyakov wrote:
> On Sat, Mar 04, 2006 at 01:41:44PM -0800, David S. Miller ([email protected]) wrote:
> > From: Jan Engelhardt <[email protected]>
> > Date: Sat, 4 Mar 2006 19:46:22 +0100 (MET)
> >
> > > Does this buy the normal standard desktop user anything?
> >
> > Absolutely, it optimizes end-node performance.
>
> It really depends on how it is used.
> According to investigation made for kevent based FS AIO reading,
> get_user_pages() performange graph looks like sqrt() function
Hmm, so I should resurrect my user page table walker abstraction?
There I would hand each page to a "recording" function, which
can drop the page from the collection or coalesce it in the collector
if your scatter gather implementation allows it.
Regards
Ingo Oeser
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