Hi,
I have a driver that is streaming data onto DMA memory. The problem I am having is that when I try to write this data to
 the HDD since the DMA memory is so slow it is creating a bootle-neck for data processing.

Why is the mmap memory access so slow? It is in the order of 15 to 20 times slower than access non mmap memory why? Is 
there anything I can do to solve this problem?

Any help is appreciated,
JIAM