Determine the contents of Linux Cache

Question

On a Linux device (using Android [Eclair] with a 2.6.29 kernel), I seem to have some contents in my cache that never go away.

I would like to be able to examine the contents of my cache to find the culprit. I've looked at mount for any tmpfs that may be causing it, but they are taking up very little space.

What other types of things could be constantly using up cache?

If there is no built in way to examine the cache, what would be a good function in the kernel to dump information from regarding this? Is there any easy point?

Thanks