** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu Raring)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu Saucy)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1152736
Title:
system swapping itself to death in raring for no good reason
Status in “linux” package in Ubuntu:
Incomplete
Status in “linux” source package in Raring:
Incomplete
Status in “linux” source package in Saucy:
Incomplete
Bug description:
My laptop has 4GB of RAM and ~6GB of swap configured. After my most
recent kernel upgrade in raring, I am noticing the system has started
swapping itself to death; the desktop becomes completely unresponsive,
and in some cases it becomes unresponsive even over SSH.
Looking remotely with SSH, I find that kswapd0 is using up nearly one
full core. I have no idea *why* - I have vm.swappiness set to 30, and
'free' shows that over 1GB of RAM is still being used for buffers, so
there really shouldn't be any memory pressure. Despite the fact that
there's only ~400MB of swap used, which should certainly fit back into
system memory, 'swapoff -a' fails with a 'Could not allocate memory'
error. If I set vm.swappiness to 0, the swap usage decreases, but
*very* slowly: after over a half hour, there's still over 400MB of
swap used. And I don't have any idea what kswapd is doing at this
point, but it's still very busy; and even after setting
vm.swappiness=0, the system has managed a second time to get itself
into an unresponsive state, with swap looking like the culprit.
dmesg shows nothing (which I will try to demonstrate by attaching logs from
the machine in question, once it's responsive enough to let me run
apport-collect).
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ApportVersion: 2.9-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: vorlon 29618 F.... pulseaudio
/dev/snd/controlC0: vorlon 29618 F.... pulseaudio
DistroRelease: Ubuntu 13.04
HibernationDevice: RESUME=UUID=f6ab3c43-61b4-4af7-bf03-fa3b147a1de0
InstallationDate: Installed on 2010-09-24 (896 days ago)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64
(20100816.1)
MachineType: LENOVO 3249CTO
MarkForUpload: True
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.8.0-10-generic
root=/dev/mapper/hostname-root ro quiet splash --verbose vt.handoff=7
ProcVersionSignature: Ubuntu 3.8.0-10.19-generic 3.8.2
RelatedPackageVersions:
linux-restricted-modules-3.8.0-10-generic N/A
linux-backports-modules-3.8.0-10-generic N/A
linux-firmware 1.103
Tags: quantal
Uname: Linux 3.8.0-10-generic x86_64
UpgradeStatus: Upgraded to quantal on 2013-01-25 (42 days ago)
UserGroups: adm admin cdrom dialout libvirtd lpadmin mythtv plugdev
sambashare src sudo
WifiSyslog:
dmi.bios.date: 08/23/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 6QET52WW (1.22 )
dmi.board.name: 3249CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr6QET52WW(1.22):bd08/23/2010:svnLENOVO:pn3249CTO:pvrThinkPadX201:rvnLENOVO:rn3249CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 3249CTO
dmi.product.version: ThinkPad X201
dmi.sys.vendor: LENOVO
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