Con Kolivas [off-list ref] wrote:

quoted

A scan of the change logs for swappiness related changes shows nothing that 

 > might explain these changes.  My question is:  "Is this change in behavior
 > deliberate, or just a side effect of other changes that were made in the vm?" 
 > and "What kind of swappiness behavior might I expect to find in future kernels?".

 The change was not deliberate but there have been some other people report 
 significant changes in the swappiness behaviour as well (see archives). It 
 has usually been of the increased swapping variety lately. It has been 
 annoying enough to the bleeding edge desktop users for a swag of out-of-tree 
 hacks to start appearing (like mine).

All of which is largely wasted effort.  It would be much more useful to get
down and identify which patch actually caused the behavioural change.
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