> Apparently some pages were discarded and the subsequent page fault 
> brought a new page. I expected the original page to be in the swap cache 
> and get the old page again. I repeated the experiment but before the 
> first ioctl I wrote something to all the pages but got the same results. 
> I used 2.4.21-4 (RH AS 3.0).

I still have grave doubts about what you try to do... is this the code
at openib.org ? or is there some other URL where the code is visible ?