Re: Revert "gro: Fix legacy path napi_complete crash", (was: Re: Linux 2.6.29)

(netdev Cc:-ed)

* Ingo Molnar [off-list ref] wrote:

Yesterday about half of my testboxes (3 out of 7) started getting 
weird networking failures: their network interface just got stuck 
completely - no rx and no tx at all. Restarting the interface did 
not help.

I've attached the reproducer (non-SMP) .config. The system has:

Note, the .config is randconfig derived. There was a stage of the 
tests when about every ~5-10th randconfig was failing, so i dont 
think it's a rare config combo that triggers this. (but there were 
other stages where 30 randconfig in a row went fine so it's hard to 
tell.)

In the worst case the hang needed 2 million packets to trigger - 
that's why i set the limit in the tests to 6 million packets.

	Ingo