Ofcourse, I have flow sequence number in the packed data with which I can determine the packet loss. If the packet is lost in the n/w then I am sure we can't help. But increasing the socket buffer size is one of the measures that we can take to avoid the packet loss, to handle situations when there is resource problem on the system. I agree that this would not necessarily mean the packet loss would be eliminated -- the very reason for having something like TCP :) I was just thinking of a preventive measure.
Thanks,
-sureshr