Re: [lwip-devel] TCP ack timing

[Peter Graf]

Mountifield, Tony wrote:

> > Anyway, I think that even with that change the original 
> > poster would see the same problem, as the max segment size
> > must be less than half the receive window for the algorithm
> > to work.
> >    
>
> The strange thing I'm finding is that by taking the MSS back down to smaller 
> values, my lwip system crashes, so I'm wondering whether there is some problem 
> with that algorithm on my system.
>
> The window size is still currently 2048.
>
> If I make the MSS 128, 256 or 512, and then send the data stream to it, it 
> crashes very quickly. If I make the MSS 1000 it crashes after a while. If I 
> make the MSS 1024 it appears to be ok.
>  
I have seen from an old comment in my code, that setting the window size 
larger than 2*MSS caused hanging my system, too. However this was much 
earlier than 0.7.0, and somewhere before 0.7.0 the problem seemed to 
have disappeared. I still have strange effects, but they appear 
extremely seldom, so I don't know wether they are still related. Just to 
let you know that you're not the only one who had the effect.

All the best
Peter