[PATCH] Re: [openib-general] Re: IPoIB Failure CQ overrun

[Michael S. Tsirkin]

Hello!
Quoting r. Roland Dreier (roland at topspin.com) "Re: [PATCH] Re: [openib-general] Re: IPoIB Failure CQ overrun":
>     Roland> Testing on PCI Express/Arbel systems (with dual 3.2 GHz
>     Roland> Xeons) with FW 4.5.3, I've seen somewhat different
>     Roland> behavior.  Even after setting IPOIB_NUM_WC to 1 so that
>     Roland> IPoIB never polls more than 1 CQE at a time (and so we
>     Roland> always inc the CI by exactly 1), I still get the CQ
>     Roland> overrun.
> 
> FW 4.6.1 on these systems behaves the way Tavor FW 3.3.1 did on my
> systems: if I modify IPoIB to always poll 1 CQE at a time, it works
> fine.  If IPoIB polls more than 1 CQE at a time then we see an
> overrun.
> 
>  - Roland

Thanks, Roland!
I'll be working on it.
mst