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Date: Wed, 15 Jun 2011 13:50:38 -0400 From: Rik van Riel <riel@...hat.com> To: Neil Horman <nhorman@...driver.com> CC: netdev@...r.kernel.org, Maxim Krasnyansky <maxk@...lcomm.com>, Cong Wang <amwang@...hat.com>, "David S. Miller" <davem@...emloft.net> Subject: Re: [PATCH] tun: teach the tun/tap driver to support netpoll On 06/15/2011 11:25 AM, Neil Horman wrote: > Commit 8d8fc29d02a33e4bd5f4fa47823c1fd386346093 changed the behavior of slave > devices in regards to netpoll. Specifically it created a mutually exclusive > relationship between being a slave and a netpoll-capable device. This creates > problems for KVM because guests relied on needing netconsole active on a slave > device to a bridge. Ideally libvirtd could just attach netconsole to the bridge > device instead, but thats currently infeasible, because while the bridge device > supports netpoll, it requires that all slave interface also support it, but the > tun/tap driver currently does not. The most direct solution is to teach tun/tap > to support netpoll, which is implemented by the patch below. > > I've not tested this yet, but its pretty straightforward. I have tested it. I can run netconsole and my KVM guests simultaneously again. Thank you, Neil! Now all I have to do is log whatever other bugs are haunting 3.0-rc and causing my system to hang :) > Signed-off-by: Neil Horman<nhorman@...driver.com> > Reported-by: Rik van Riel<riel@...hat.com> > CC: Rik van Riel<riel@...hat.com> > CC: Maxim Krasnyansky<maxk@...lcomm.com> > CC: Cong Wang<amwang@...hat.com> > CC: "David S. Miller"<davem@...emloft.net> Reviewed-by: Rik van Riel <riel@...hat.com> Tested-by: Rik van Riel <riel@...hat.com> -- All rights reversed -- 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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