Date: Thu, 01 Jun 2017 10:41:08 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 219703] System freeze when creating bridge over vlan over lagg over ixgbe Message-ID: <bug-219703-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D219703 Bug ID: 219703 Summary: System freeze when creating bridge over vlan over lagg over ixgbe Product: Base System Version: 11.0-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: topical@gmx.net I have an Intel 82599ES card, using standard ixgbe driver (no special parameters). The two ports are combined into a lagg. For virtual machines, a vlan is created on the lagg. This vlan is connected to a bridge. behyve machines shall be connected to this bridge. In my case, there are 3 vlans a= nd bridges, but the problem occurs already on creating the 1st vlan/bridge. The network setup is: cloned_interfaces=3D"lagg0" ifconfig_ix0=3D"up mtu 9000 -lro" ifconfig_ix1=3D"up mtu 9000 -lro" ifconfig_lagg0=3D"laggproto lacp laggport ix0 laggport ix1 10.0.10.17/24" defaultrouter=3D"10.0.10.1" vm-bhyve creates bridges according to following config: switch_list=3D"br4 br7 br8" vlan_br4=3D"4" ports_br4=3D"lagg0" vlan_br7=3D"7" ports_br7=3D"lagg0" vlan_br8=3D"8" ports_br8=3D"lagg0" As soon as vm-bhyve create the first bridge and vlan, the system freezes ha= rd. Sadly, installing a debug kernel doesn't help; the magic sysrequest key combination is ignored. I extracted the network commands executed by vm-bhyve startup script: ifconfig bridge create ifconfig bridge0 description something up ifconfig vlan create <-- system freezes here --> ifconfig vlan0 vlandev lagg0 vlan 4 description something up ifconfig bridge0 addm vlan0 Inserting "sleep 1" after "ifconfig vlan create" seems to fix it. Even minor delays (e.g. a simple echo to the EFI console after each command) seem to f= ix it. Without the delay, changes are about 90% that the system freezes. This problem seems to occur only with the ixgbe driver. In previous tests w= ith a NetXtreme II BCM57810 card and the bxe driver everything worked fine, tho= ugh the bxe driver seems to lack hardware vlan support which was the reason to replace it with the Intel card. It looks like a nasty race condition and I'm not really happy with patching vm-bhyve, hoping that the (blindly inserted) workaround does the trick.=20 The server is a DL380 Gen9. The network cards is an off the shelf Intel 825= 99ES (i.e. not a HP branded one). --=20 You are receiving this mail because: You are the assignee for the bug.=
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