I know the implementation is different. Linux implementation doesn't have the clock heads.
But I get a feel that the essence is the same except that Linux version doesn't have non-resident pages.

Da

On Mon, Mar 12, 2012 at 12:04 PM, Christoph Lameter <cl@linux.com> wrote:
On Mon, 12 Mar 2012, Zheng Da wrote:

> I try to understand the Linux memory management. I was told Linux uses
> ClockPro to manage page cache
> and http://linux-mm.org/PageReplacementDesign also says so for file pages.
> But when I read the ClockPro paper,
> it doesn't look the same. The Linux implementation doesn't have
> non-resident pages. Other than
> that, it doesn't have the same test period mentioned in the paper. I wonder
> if the Linux implementation
> have the same effect as ClockPro. Could anyone confirm Linux is still using
> ClockPro?

That Linux is using Clockpro is news to me. Linux Memory management uses
some ideas from Clockpro to improve reclaim etc but it does not implement ClockPro.