Re: 2.4.6-pre2, pre3 VM Behavior

[Mark Hahn]

> > Would it be possible to maintain a dirty-rate count
> > for the dirty buffers?
> > 
> > For example, we it is possible to figure an approximate
> > disk subsystem speed from most of the given information.
> 
> Disk speed is difficult.  I may enable and disable swap on any number of
...
> You may be able to get some useful approximations, but you
> will probably not be able to get good numbers in all cases.

a useful approximation would be simply an idle flag.
for instance, if the disk is idle, then cleaning a few 
inactive-dirty pages would make perfect sense, even in 
the absence of memory pressure.