On Thursday, 7. August 2008 13:50:42 Denys Fedoryshchenko wrote:

By the way, i had also problem with frto with local connections, and it was
trivial to reproduce. But because of proprioetary(but i have sources)
userspace application and specific way of using it - i didn't report to
maillist. But after patch is ready, add me please in cc, i will test it
with me too.

For me disabling frto helps to solve problem. With frto i have
connections "stalling", if there is trasferred large chunks of data over
loopback. It is complicated way how it works all - but i can try to explain
how everything works, if required.

What kernel version are you using?

IMHO this could only happen on the loopback interface
if you are a) using an "old" kernel version like 2.6.24/2.6.25
or b) there might be a bug hidden somewhere else.

Ilpo has sent the "final" patch to linux-netdev
some minutes ago, give it a try.

Thomas