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Date: Mon, 12 Oct 2009 14:08:56 -0700 From: Ben Greear <greearb@...delatech.com> To: NetDev <netdev@...r.kernel.org> Subject: Re: Link bouncing with multiple drivers. On 10/12/2009 10:55 AM, Ben Greear wrote: > I have a strange issue: > > In several different scenarios, when we run pktgen at line speed > on 1G through our proprietary bridge-ish module, we see link go > up and down every minute or so. This happens with e1000, e1000e, > and have also seen it on ixgbe (though not line speed here...but > we were driving it as hard as the systems could handle). > > We cannot reproduce this when a normal bridge is substituted for > our proprietary module, so it must either be a bug in our code somewhere, > or something to do with the fact that our module causes more work to > be done than a bridge (backed up driver queues on rx/tx, time-stamps, etc). > > Since it happens across multiple drivers and hardware (and operating > systems: F5, F8, F11, > but all with kernels based on 2.6.31), it must be some general issue. > > If anyone has any ideas where I should start poking, I would > be grateful. For now, I'm off to dig in the e1000e code... Ahh, it was indeed my bug. I forgot to update the txqueue trans_start and that caused the watchdog to fire way too often. Thanks, Ben -- Ben Greear <greearb@...delatech.com> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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