Free kernel memory

[klussier at comcast.net]

Hi All,

I am looking for a way to flush the cached memory from a system. The reason is that tools like free have output like:
nashua:~# free -m
             total       used       free     shared    buffers     cached
Mem:    3042       2890        152          0        193       1757
-/+ buffers/cache: 938       2103
Swap:          956          4        951

I'm looking for a way to flush the cache and buffers so that memory that is not currently in use shows in the "free" pool. Any ideas?

Thanks,
Kenny