kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Thanks for testing, Michael.

Yes, I'm using the upstream kernel version tags for the bisect.  So what I did was:
1. clone the mainline tree.
2.  Start the bisect and enter the last good and first bad kernel versions:
git bisect start
git bisect good v3.10
git bisect bad v3.11-rc1

git then returned the first SHA1 to test, which was
1286da8bc009cb2aee7f285e94623fc974c0c983

I built a test kernel up to that commit, which you tested and found did
not have the bug.

I then used your test result to tell git the kernel with commit 1286da8 as the tip did not have the bug:
git bisect good 1286da8bc009cb2aee7f285e94623fc974c0c983

git then calculated the next SHA1 which is:
1b375dc30710180c4b88cc59caba6e3481ec5c8b

I'll build a test kernel up to that commit now and post the kernel
shortly.  We can then repeat the process.  A bisect like this usually
takes about 7 to 10 cycles to figure out the offending commit.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1213917

Title:
  kworker thread 99.8 - 100% CPU after 1st suspend - no second suspend

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  After updating today (hadn't updated for a while), my fan won't stop
  and top is showing:

    PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
      4 root      20   0     0    0    0 R 100,2  0,0  36:42.35 kworker/0:0

  Edit: seems related to bug 1214071. I can reproduce with:

  1) Start with a fresh reboot
  2) suspend and resume

  At this point after the successful resume, kworker thread starts
  consuming 100% cpu and I can no longer suspend (bug 1214071).

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-2-generic 3.11.0-2.5
  ProcVersionSignature: Ubuntu 3.11.0-2.5-generic 3.11.0-rc5
  Uname: Linux 3.11.0-2-generic x86_64
  ApportVersion: 2.12-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  michael    2372 F.... pulseaudio
  Date: Mon Aug 19 14:39:57 2013
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=1efd421f-ac68-455b-b4d4-8912fa02494d
  MachineType: ASUSTeK COMPUTER INC. X201EP
  MarkForUpload: True
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-2-generic.efi.signed root=UUID=05643352-201b-43e8-976a-c1d40d591e80 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-2-generic N/A
   linux-backports-modules-3.11.0-2-generic  N/A
   linux-firmware                            1.113
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/04/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: X201EP.209
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: X201EP
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK COMPUTER INC.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrX201EP.209:bd02/04/2013:svnASUSTeKCOMPUTERINC.:pnX201EP:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnX201EP:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
  dmi.product.name: X201EP
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK COMPUTER INC.

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