Public bug reported:
On machines WITHOUT swap, when memory gets close to full, massive
amounts of IO is generated and the machine comes to a halt until some
memory is freed up.
Basically running a few memory intensive applications (VirtualBox with a
few VMs and chrome) will easily use up all the memory. When free memory
drops to 300-400mb, I can see in iotop that pretty much all the
processes running start generating IO and the HDD LED lights up solid.
After a minute or so, iotop will also stop updating the screen. If I
have a shell running in a VC, then issuing 'killall chromium-browser'
which frees up memory will almost immediately make the machine
responsive again and the IO will stop. This is NOT related only to
chromium - it's just the easiest to kill to free up a lot of memory.
Just to make sure it is clear - this machine has swap disabled, so this
is not a case of swapping.
ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image (not installed)
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.36-1.7-generic 2.6.36
Uname: Linux 2.6.36-1-generic x86_64
.etc.asound.conf:
pcm.pulse { type pulse }
ctl.pulse { type pulse }
pcm.!default { type pulse }
ctl.!default { type pulse }
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: local 8414 F.... pulseaudio
/dev/snd/pcmC0D0p: local 8414 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf6adc000 irq 44'
Mixer name : 'Intel Cantiga HDMI'
Components : 'HDA:111d76b2,10280233,00100302
HDA:80862802,80860101,00100000'
Controls : 25
Simple ctrls : 16
Date: Mon Nov 8 14:17:48 2010
HibernationDevice: RESUME=UUID=cfcb2267-1e40-4d5b-8f7a-bca833977355
MachineType: Dell Inc. Latitude E6400
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.36-1-generic
root=UUID=6d99a14c-e196-4cc7-8531-4f232db7755b ro quiet splash
enable_mtrr_cleanup mtrr_spare_reg=1
ProcEnviron:
LC_TIME=en_GB.UTF-8
LANGUAGE=en_SG:en
PATH=(custom, user)
LANG=en_SG.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
UserAsoundrc:
# ALSA library configuration file
# Include settings that are under the control of asoundconf(1).
# (To disable these settings, comment out this line.)
</home/local/.asoundrc.asoundconf>
WpaSupplicantLog:
dmi.bios.date: 06/04/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A25
dmi.board.name: 0HT027
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA25:bd06/04/2010:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn0HT027:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug hibernate kernel-power maverick
needs-upstream-testing resume
--
High memory use causes IO storm
https://bugs.launchpad.net/bugs/672412
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