kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

Did this issue start happening after an update/upgrade?  Was there a
prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.7-rc1 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.7-rc1-yakkety/


** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

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

-- 
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/1589491

Title:
  Kernel memory leak: swap in use without obvious program using it

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  I don't know how to diagnose this problem and internet searches do not
  give clear pointers: resource usage programs (free, top, htop) report
  huge total swap usage (growing over time until all swap space is
  exhausted), but no application is using unusual amounts of memory. In
  other words, memory seems to be being lost without being associated to
  some process.

  I don't now if this could be the fault of the kernel, some module, or
  something else. I would appreciate any pointers on how to try to
  pinpoint the culprit.

  The bug has been filed with ubuntu-bug so all process memory usage
  should be included. As I write, I see around 4G of swap used, and the
  program using the most is using ~80MB only. Certainly, the aggregated
  swap seen with top in programs is nowhere near 4G.

  The swap use seems legit, since once the swap space is reported
  exhausted, the computer starts being less responsive, until I reboot.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-generic 4.2.0.36.39
  ProcVersionSignature: Ubuntu 4.2.0-36.42-generic 4.2.8-ckt8
  Uname: Linux 4.2.0-36-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  jano       1901 F.... pulseaudio
   /dev/snd/controlC1:  jano       1901 F.... pulseaudio
  CurrentDesktop:
   
  Date: Mon Jun  6 14:59:25 2016
  InstallationDate: Installed on 2016-02-08 (118 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  MachineType: Hewlett-Packard HP Compaq 8200 Elite SFF PC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-36-generic root=UUID=5e3b17bb-b786-4c5d-b231-c51f3c2e5fda ro quiet splash crashkernel=384M-:128M vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-36-generic N/A
   linux-backports-modules-4.2.0-36-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2016-04-26 (41 days ago)
  WifiSyslog:
   jun 03 09:50:29 miles kernel: usb 1-1.6: reset high-speed USB device number 5 using ehci-pci
   jun 03 10:43:53 miles kernel: usb 1-1.6: reset high-speed USB device number 5 using ehci-pci
   jun 06 12:12:37 miles kernel: [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
   jun 06 13:26:50 miles kernel: [drm] GPU HANG: ecode 6:-1:0x00000000, reason: Kicking stuck semaphore on render ring, action: continue
  dmi.bios.date: 06/09/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: J01 v02.06
  dmi.board.asset.tag: CZC13832LR
  dmi.board.name: 1495
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: CZC13832LR
  dmi.chassis.type: 6
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrJ01v02.06:bd06/09/2011:svnHewlett-Packard:pnHPCompaq8200EliteSFFPC:pvr:rvnHewlett-Packard:rn1495:rvr:cvnHewlett-Packard:ct6:cvr:
  dmi.product.name: HP Compaq 8200 Elite SFF PC
  dmi.sys.vendor: Hewlett-Packard

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