Public bug reported:
Binary package hint: linux-image-2.6.38-7-generic
I often copy data from a server using rsync against a local USB disk.
I did this now for the first time since I upgraded to Natty dev a few
days ago and the system becomes almost unusable while rsync is running.
Before I used Karmic and never had any problems with rsync running in
the background.
The system is a notebook with a Core2 Duo CPU and 2 GB physical RAM.
As soon as rsync is running, kswapd0 completely eats one of the CPU
cores and the system is extremely unresponsive. As one can see in the
following "free" output, *lots* of data is cached, but not even half of
the memory is used by applications. The system even does not actually
swap very much, but kswapd0 still works like mad, whatever it does.
total used free shared buffers cached
Mem: 2047288 2030620 16668 0 396516 975876
-/+ buffers/cache: 658228 1389060
Swap: 1992024 317748 1674276
I tried lowering the swappiness from 60 to 20 and while the system
stopped swapping even the bit it did before, system responsiveness was
only slightly improved and kswapd0 was stiil using 100% of one of the
CPU cores.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic 2.6.38-7.39
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
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: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xdc240000 irq 45'
Mixer name : 'Conexant CX20549 (Venice)'
Components : 'HDA:14f15045,173410ad,00100100'
Controls : 21
Simple ctrls : 10
Date: Fri Apr 1 21:34:23 2011
HibernationDevice: RESUME=UUID=377826f7-d8aa-4b83-9605-6ba87d47aeea
MachineType: FUJITSU SIEMENS Amilo Si 1520
ProcEnviron:
LANGUAGE=
LANG=de_DE@euro
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-7-generic
root=UUID=37d94e9a-f57d-4c87-b661-20c037b7643e ro quiet
RelatedPackageVersions:
linux-restricted-modules-2.6.38-7-generic N/A
linux-backports-modules-2.6.38-7-generic N/A
linux-firmware 1.49
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-03-30 (2 days ago)
dmi.bios.date: 07/21/2006
dmi.bios.vendor: Phoenix
dmi.bios.version: 1.10
dmi.board.name: 10AD
dmi.board.vendor: FUJITSU
dmi.board.version: 3D22
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU SIEMENS
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenix:bvr1.10:bd07/21/2006:svnFUJITSUSIEMENS:pnAmiloSi1520:pvrRev1:rvnFUJITSU:rn10AD:rvr3D22:cvnFUJITSUSIEMENS:ct10:cvrN/A:
dmi.product.name: Amilo Si 1520
dmi.product.version: Rev 1
dmi.sys.vendor: FUJITSU SIEMENS
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug kernel-fs natty needs-upstream-testing
regression-proposed
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https://bugs.launchpad.net/bugs/747707
Title:
kswapd0 freaks out if rsync runs on an USB disk
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