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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Looks like this is the commit that fixes the issue in the 3.16 kernel:

commit 4a46b24e147dfa9b858026da02cad0bdd4e149d2
Author: Alex Wang <alexw@xxxxxxxxxx>
Date:   Mon Jun 30 20:30:29 2014 -0700

    openvswitch: Use exact lookup for flow_get and flow_del.

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https://bugs.launchpad.net/bugs/1408972

Title:
  openvswitch: failed to flow_del (No such file or directory)

Status in linux package in Ubuntu:
  Confirmed
Status in openvswitch package in Ubuntu:
  Invalid

Bug description:
  As part of the investigation into bug 1336555, we've noticed a large
  number of these error messages being logged in 14.04 OpenStack
  deployments:

  2015-01-09T10:50:53.643Z|03976|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:54.644Z|03977|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:55.645Z|03978|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:56.645Z|03979|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:57.646Z|03980|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:58.646Z|03981|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:50:59.645Z|03982|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:51:00.646Z|03983|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)
  2015-01-09T10:51:01.646Z|03984|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(4),skb_mark(0),eth(src=ce:2b:3a:c3:d7:d1,dst=33:33:ff:50:c2:61),eth_type(0x86dd),ipv6(src=::,dst=ff02::1:ff50:c261,label=0,proto=58,tclass=0,hlimit=255,frag=no),icmpv6(type=135,code=0),nd(target=fe80::5ccd:caff:fe50:c261)

  this was fixed upstream in the datapath dkms module (see
  https://github.com/openvswitch/ovs/commit/3601bd879) and is fixed in
  the 3.16 kernel as well; please can this fix be backported to 3.13.

  Thanks!

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-generic 3.13.0.43.50
  ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
  Uname: Linux 3.13.0-35-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Dec 11 21:01 seq
   crw-rw---- 1 root audio 116, 33 Dec 11 21:01 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Fri Jan  9 10:50:39 2015
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: HP ProLiant DL360p Gen8
  PciMultimedia:
   
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=f8e77ea1-c970-4e7a-9e49-48532d763167 ro console=tty0 console=ttyS1,38400 quiet
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-35-generic N/A
   linux-backports-modules-3.13.0-35-generic  N/A
   linux-firmware                             1.127.10
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/21/2012
  dmi.bios.vendor: HP
  dmi.bios.version: P71
  dmi.chassis.type: 23
  dmi.chassis.vendor: HP
  dmi.modalias: dmi:bvnHP:bvrP71:bd02/21/2012:svnHP:pnProLiantDL360pGen8:pvr:cvnHP:ct23:cvr:
  dmi.product.name: ProLiant DL360p Gen8
  dmi.sys.vendor: HP

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