Date: Mon, 20 Mar 2017 15:01:59 +0100 From: Vincenzo Maffione <v.maffione@gmail.com> To: Harry Schmalzbauer <freebsd@omnilan.de> Cc: freebsd-net <freebsd-net@freebsd.org> Subject: Re: [panic] netmap(4) and if_lagg(4) Message-ID: <CA%2B_eA9jf_VjcYUZynu5CXx-ps5z7PSxOky=QLpR-miqtxmMU5w@mail.gmail.com> In-Reply-To: <58CFA394.8070901@omnilan.de> References: <58CBCD7A.8060301@omnilan.de> <CA%2B_eA9iCT7evWUcZMA_ViKfrZnSHp3OpBTS5c4iJ9=ZjO-Pfgw@mail.gmail.com> <58CC23F5.7060507@omnilan.de> <CA%2B_eA9iajZOUFsnWKdodN7zMvst8wn0xViM4xxEx%2B41jw_0B3g@mail.gmail.com> <58CFA394.8070901@omnilan.de>
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2017-03-20 10:40 GMT+01:00 Harry Schmalzbauer <freebsd@omnilan.de>: > Bez=C3=BCglich Vincenzo Maffione's Nachricht vom 17.03.2017 22:28 (localt= ime): > > Two things here: > > > > - We pushed an important fix to stable/11 1-2 months ago, that prevents > > panic on emulated netmap mode. Maybe you are still getting that panic > > because you are using an older stable/11 image, you should check. > > - If you are using "software devices" like if_lagg or even vlan > > interfaces, netmap and VALE won't help you a lot, because the drivers > > are not patched for netmap (and cannot be) > > Thank you for your explanation. I'm aware of loosing most advantages, > but it gives me the possibility to use different MTUs with one > switch/bridge. > > > I'll try to provide more info about the panic this week. Like discussed > offlist, the panic happend on a machine with the mentioned fix (latest > stable). > Perhaps this panic can be fixed, especialy for the vlan children. > Ok, so if you create a vlan on an interface, and use netmap over the vlan, you get a deterministic crash? Does the crash happen when you start transmitting, receiving or both? > Otoh., I guess it's NIC (igb) related and em/igb overhaul will hit > stable/11 eventually. And afaik, theres no native netmap support > anymore :-( > So probably resources are better spent on that instead of fixing a panic > which doesn't seem to affect anyone else than me. > There is an overhaul in progress, yes, but netmap support is going to be restored. > > Thanks, > > -harry > --=20 Vincenzo Maffione
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