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** Changed in: linux (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1589491
Title:
Kernel memory leak: swap in use without obvious program using it
Status in linux package in Ubuntu:
Confirmed
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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