> secondly, allocating more than 4g at a time to socket buffers is > generally a waste of memory.
and there is one further problem. Eventually, this subsystem will starve the system. Other subsystems which also need large amounts of memory, then have to scramble. There have to be backpressure mechanisms in each subsystem to force out memory. There is no such mechanism in socket buffers. The mechanisms in the remaining parts of the kernel have always proven to be weak, as in, they don't interact as nicely as we want, to create space. There has been much work to make them work better. However in socket buffers, there is no such mechanism. What are you going to do. Throw data away? You can't do that. Therefore, you are holding the remaining system components hostage, and your diff creates deadlock. You probably tested your diff under ideal conditions with gobs of memory...
