From: Roland Dreier <[EMAIL PROTECTED]> Date: Sat, 28 Jul 2007 08:21:58 -0700
> > Another area of consternation are drivers that were using > > netif_rx_reschedule(), as that interface was removed because it > > doesn't fit well with the caller managing the dev->quota et al. I > > left race conditions in the drivers that were using that interface, > > but they should still basically work nonetheless. > > ...but this is a problem for IPoIB. The underlying IB stuff only > allows us to register what is essentially a one-shot edge-triggered > interrupt. So there is a race between calling netif_rx_complete() and > calling ib_req_notify_cq() (which enables the interrupt), since the > interrupt might never happen if a packet arrives between the two calls. You will see further along in the thread that we have found a locking sequence by which this issue can be resolved. Please read the full thread and the most recent patch before coming to conclusions :-) - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
