[Bug 997695] UdevLog.txt

[Bianco Veigel]

apport information

** Attachment added: "UdevLog.txt"
   https://bugs.launchpad.net/bugs/997695/+attachment/3141107/+files/UdevLog.txt

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Title:
  severe performance issue using mdadm raid5 on top of LUKS

Status in “cryptsetup” package in Ubuntu:
  Invalid
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I've upgraded to 12.04 a few days ago and since this, the performance
  of my crypto-drive is limited by CPU.

  I'm running an MDADM RAID5 on top of 7 independendtly encrypted drives
  (Seagate Barracuda XT 7200.12 2TB each encrypted using crypsetup /
  LUKS).

  The problem seems to be, that in 12.04 all encryption is done using
  only a single CPU core. In 10.04 each crypt-device used its own thread
  (kcrypt), that was the reason to encrypt each device independently and
  build a raid on top of the crypto devices.

  I'll attach a screenshot of munins iostat and CPU graph to illustrate the difference before and after the upgrade
  --- 
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Mai  1 15:52 seq
   crw-rw---T 1 root audio 116, 33 Mai  1 15:52 timer
  AplayDevices: aplay: device_list:252: no soundcards found...
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  ArecordDevices: arecord: device_list:252: no soundcards found...
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=
  IwConfig:
   lo        no wireless extensions.
   
   virbr0    no wireless extensions.
   
   eth0      no wireless extensions.
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 004 Device 002: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=de_DE:de:en_US:en
   TERM=xterm
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 nouveaufb
  ProcKernelCmdLine: root=/dev/mapper/md1_crypt ro quiet splash
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-24-generic N/A
   linux-backports-modules-3.2.0-24-generic  N/A
   linux-firmware                            1.79
  RfKill: Error: [Errno 2] No such file or directory
  StagingDrivers: cxd2099
  Tags:  precise staging
  Uname: Linux 3.2.0-24-generic x86_64
  UpgradeStatus: Upgraded to precise on 2012-04-30 (10 days ago)
  UserGroups: mythtv
  dmi.bios.date: 04/30/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.30
  dmi.board.name: K10N78FullHD-hSLI..
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.30:bd04/30/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnK10N78FullHD-hSLI..:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

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