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=219703 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 and bridges, but the problem occurs already on creating the 1st vlan/bridge. The network setup is: cloned_interfaces="lagg0" ifconfig_ix0="up mtu 9000 -lro" ifconfig_ix1="up mtu 9000 -lro" ifconfig_lagg0="laggproto lacp laggport ix0 laggport ix1 10.0.10.17/24" defaultrouter="10.0.10.1" vm-bhyve creates bridges according to following config: switch_list="br4 br7 br8" vlan_br4="4" ports_br4="lagg0" vlan_br7="7" ports_br7="lagg0" vlan_br8="8" ports_br8="lagg0" As soon as vm-bhyve create the first bridge and vlan, the system freezes hard. 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 fix 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 with a NetXtreme II BCM57810 card and the bxe driver everything worked fine, though 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. The server is a DL380 Gen9. The network cards is an off the shelf Intel 82599ES (i.e. not a HP branded one). -- You are receiving this mail because: You are the assignee for the bug.
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