[__david__]

I think we're talking past each other here. I don't think we're disagreeing on the userspace part. I'm not even implying that the the low level kernel interface should have unconfigurable buffer sizes. They should be configurable, but pre-allocated and non-growable. You're right, the userspace part can do whatever it wants. But I stand by my last paragraph (you either drop or grind things to a halt).