Re: bad TSO performance in 2.6.9-rc2-BK

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

On Wed, 29 Sep 2004 17:51:22 -0400 (EDT)
John Heffner <jheffner@xxxxxxx> wrote:

> I managed to get a tcpdump of one flow.  I accidentally deleted it, but
> from memory what I saw was it ramped up to large virtual segments, then
> got a partial ack for it (all but the last real segment -- delayed ack
> here) then later after the full ack got back sent one small segment.
> This segment was acked, but it never seemed to recognize this ack and
> repeatedly retransmitted it after timeouts.  (Generating the retrans_out
> leaked messages when the d-sacks came back.)
> 
> I can't conveniently get a backtrace of the crash right now.

I can get one now, thanks for the trace description it's
a good clue.