From: Eric Dumazet <[email protected]> Date: Tue, 08 Dec 2015 05:54:40 -0800
> From: Eric Dumazet <[email protected]> > > Under heavy TX load, bnx2x_poll() can loop forever and trigger > soft lockup bugs. > > A napi poll handler must yield after one TX completion round, > risk of livelock is too high otherwise. > > Bug is very easy to trigger using a debug build, and udp flood, because > of added cpu cycles in TX completion, and we do not receive enough > packets to break the loop. > > Reported-by: Willem de Bruijn <[email protected]> > Signed-off-by: Eric Dumazet <[email protected]> Indeed, no driver should ever do more than one TX completion round per NAPI poll call, _ever_. -- 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
