On Tue, 1 Dec 2009, Frederic Leroy wrote:

Le Mon, 30 Nov 2009 23:37:56 +0200 (EET),
"Ilpo Järvinen" [off-list ref] a écrit :

quoted

On Mon, 30 Nov 2009, Frederic Leroy wrote:

Could you try btw to disable frto (set tcp_frto sysctl to zero), in
theory it could cause zero cwnd if something else is wrong too (I
haven't yet read them all through so there might be other places
where a zero cwnd can be set). Also I'm interested what happens if
you disable timestamps, is the problem still reproducable.

I made 3 new traces and put it in the usual place.
One with frto set to 0, one just after with frto set to 2.

And the last with timestamp disabled. 

All stream has stalled.

Thanks, I'll hopefully have some time tomorrow to go through all the new 
ones. In the meantime, can you provide your tso configuration on houba 
(ethtool -k dev). If tso is on it might be worth to try without it 
(set with -K), however, I don't expect it to change anything. Also,
I wonder if you have had some working (past) kernel version?

No need for additional traces atm, I'll get back to this once I've gone 
through the logs.

-- 
 i.