> I am running a 2.2.3 kernel and am seeing the following, which I believe to
> be a disparity, or at least deserves an explanation.
>
> First, I've increased /proc/sys/net/core/rmem_max to 1048560, for my udp
> application which receives a large amount of packets.
>
> I use setsockopt(SO_RCVBUF) with an argument of 524280 to increase the
> amount of backlog my application can handle while it is off doing other
> things.
>
> getsockopt(SO_RCVBUF) returns 262140. Shouldn't it return 524280?
I cannot reproduce it here. What Linux does is to return _twice_ the amount
of rmem/wmem you set (this is because of the internal heuristic used
to account for skbuff headers)
-Andi
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