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Date: Mon, 16 Jun 2014 21:19:34 +0200 From: Stefan Priebe - Profihost AG <s.priebe@...fihost.ag> To: Cong Wang <cwang@...pensource.com> Cc: Stephen Hemminger <stephen@...workplumber.org>, David Miller <davem@...emloft.net>, "bridge@...ts.linux-foundation.org" <bridge@...ts.linux-foundation.org>, Linux Netdev List <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: netconsole breaks netpoll on bridge > Am 16.06.2014 um 21:12 schrieb Cong Wang <cwang@...pensource.com>: > > On Mon, Jun 16, 2014 at 12:05 PM, Stefan Priebe - Profihost AG > <s.priebe@...fihost.ag> wrote: >> >>> Am 16.06.2014 um 20:51 schrieb Cong Wang <cwang@...pensource.com>: >>> >>> On Mon, Jun 16, 2014 at 11:41 AM, Stefan Priebe - Profihost AG >>> <s.priebe@...fihost.ag> wrote: >>>> >>>>> Am 16.06.2014 um 20:05 schrieb Cong Wang <cwang@...pensource.com>: >>>>> >>>>> On Mon, Jun 16, 2014 at 5:51 AM, Stefan Priebe - Profihost AG >>>>> <s.priebe@...fihost.ag> wrote: >>>>>> Hi, >>>>>> >>>>>> i'm using a vanilla 3.10.43 kernel and netconsole on top of a bridge. >>>>>> >>>>>> netconsole is used with vmbr0 (bridge) which is on top of bond0. >>>>>> >>>>>> If i want to add another bridge to vmbr0 is fails as long as netconsole >>>>>> is in use. >>>>>> >>>>>> # brctl addif vmbr0 fwpr2004p0 >>>>>> can't add fwpr2004p0 to bridge vmbr0: Unknown error 524 >>>>>> >>>>>> Kernel output: >>>>>> netpoll: (null): fwpr2004p0 doesn't support polling, aborting >>>>>> >>>>>> If i do rmmod netconsole - everything is working fine again. >>>>> >>>>> This is expected, you can't add an interface which doesn't support >>>>> netpoll to a bridge which is running netpoll. >>>> >>>> Thanks, so i can't use netconsole at a bridge used for vms? >>> >>> You can, but you need to make sure all the devices under >>> this bridge support netpoll. Not considering mac learning, >>> bridge just broadcasts all the packets to its ports, if one of them >>> doesn't support netpoll, how could it work? >> >> Ok i was trying to add a veth device so this is the problematic device. > > We can just add netpoll support to veth device, it should not be hard. > I will work on it once net-next is open. That sounds great! Is there anything I can do or some code I can port to veth? Greets, Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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