Re: 2.6.10 TCP troubles -- suggested patch

["David S. Miller" <davem@xxxxxxxxxxxxx>]

On Sat, 12 Feb 2005 17:16:41 +0300
Alexey Kuznetsov <kuznet@xxxxxxxxxxxxx> wrote:

> > This set of data frames you quoted are all full, and
> > are tightly interspaced.  It looks exactly like a TSO
> > frame, which we certainly set PSH on, but the TSO
> > engine is dropping it aparently.
 ...
> Or it was two one-segment frames.

Even ignoring my TSO changes, we should be seeing at a minimum
1/2 window PSH settings which we're not as far as I can tell.
(this is due to the forced_push() test in net/ipv4/tcp.c)

This also points out a bug in my TSO PSH patch, I should be
updating tp->pushed_seq shouldn't I?  Question is, what to
set it to?  I think correct value is TCP_SKB_CB(skb)->end_seq.

> I.e. let's disable TSO in 2.6.9 and look.

I believe this experiment had been performed already.  Stephen,
isn't that the case?