Re: peer 192.168.9.2:5001/1029 shrinks window

[kuznet@xxxxxxxxxxxxx]

Hello!

> I get these when doing TCP transfers with gensink running around 70MB/s
> using jumbo frames between two 2.4.0-test10 boxes (with 1MB alteon-based
> cards on both ends). 
....
> TCP: peer 192.168.9.2:5001/1029 shrinks window 2050038622:599504:2050638138.

Ignore this. This is an inavoidable by-product of window scaling.

Unfortunately this case cannot be distinguished of true window shrinking
reliably, so that the message is not filtered out. If it clogs your logs,
delete all it or, even better, add check sort of:

        if (tp->snd_nxt-(tp->snd_una+tp->snd_wnd) >= (1<<tp->snd_wscale))

Alexey