Re: [PATCH 0/8] Intel I/O Acceleration Technology (I/OAT)

Evgeniy Polyakov wrote:

On Sat, Mar 04, 2006 at 01:41:44PM -0800, David S. Miller (davem@davemloft.net) wrote:

quoted

From: Jan Engelhardt <redacted>
Date: Sat, 4 Mar 2006 19:46:22 +0100 (MET)

quoted

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