kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Biano Veigel, this bug report is being closed due to your last comment
https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/997695/comments/21
regarding how you no longer have the same configuration, hardware, and
the issue is no longer reproducible with your current configuration and
hardware. For future reference you can manage the status of your own
bugs by clicking on the current status in the yellow line and then
choosing a new status in the revealed drop down box. You can learn more
about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you
again for taking the time to report this bug and helping to make Ubuntu
better. Please submit any future bugs you may find.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Invalid

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https://bugs.launchpad.net/bugs/997695

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

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

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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