[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] xen-netfront crash when detaching network while some network activity
On 01/20/2016 09:59 PM, Konrad Rzeszutek Wilk wrote: > On Tue, Dec 01, 2015 at 11:32:58PM +0100, Marek Marczykowski-Górecki wrote: >> On Tue, Dec 01, 2015 at 05:00:42PM -0500, Konrad Rzeszutek Wilk wrote: >>> On Tue, Nov 17, 2015 at 03:45:15AM +0100, Marek Marczykowski-Górecki wrote: >>>> On Wed, Oct 21, 2015 at 08:57:34PM +0200, Marek Marczykowski-Górecki wrote: >>>>> On Wed, May 27, 2015 at 12:03:12AM +0200, Marek Marczykowski-Górecki >>>>> wrote: >>>>>> On Tue, May 26, 2015 at 11:56:00AM +0100, David Vrabel wrote: >>>>>>> On 22/05/15 12:49, Marek Marczykowski-Górecki wrote: >>>>>>>> Hi all, >>>>>>>> >>>>>>>> I'm experiencing xen-netfront crash when doing xl network-detach while >>>>>>>> some network activity is going on at the same time. It happens only >>>>>>>> when >>>>>>>> domU has more than one vcpu. Not sure if this matters, but the backend >>>>>>>> is in another domU (not dom0). I'm using Xen 4.2.2. It happens on >>>>>>>> kernel >>>>>>>> 3.9.4 and 4.1-rc1 as well. >>>>>>>> >>>>>>>> Steps to reproduce: >>>>>>>> 1. Start the domU with some network interface >>>>>>>> 2. Call there 'ping -f some-IP' >>>>>>>> 3. Call 'xl network-detach NAME 0' >>> >>> Do you see this all the time or just on occassions? >> >> Using above procedure - all the time. >> >>> I tried to reproduce it and couldn't see it. Is your VM an PV or HVM? >> >> PV, started by libvirt. This may have something to do, the problem didn't >> existed on older Xen (4.1) and started by xl. I'm not sure about kernel >> version there, but I think I've tried there 3.18 too, which has this >> problem. >> >> But I don't see anything special in domU config file (neither backend >> nor frontend) - it may be some libvirt default. If that's really the >> cause. Can I (and how) get any useful information about that? > > libvirt naturally does some libxl calls, and they may be different. > > Any chance you could give me an idea of: > - What commands you use in libvirt? > - Do you use a bond or bridge? > - What version of libvirt you are using? > > Thanks! > CC-ing Joao just in case he has seen this. >> Hm, So far I couldn't reproduce the issue with upstream Xen/linux/libvirt, using both libvirt or plain xl (both on a bridge setup) and also irrespective of the both load and direction of traffic (be it a ping flood, pktgen with min. sized packets or iperf). >> >> -- >> Best Regards, >> Marek Marczykowski-Górecki >> Invisible Things Lab >> A: Because it messes up the order in which people normally read text. >> Q: Why is top-posting such a bad thing? > > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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