I'm still able to reproduce this problem. On this try my system froze
because of this deadlock. It wasn't even possible anymore to login in
the console.
** Description changed:
I'm using Ubuntu 11.10 dev. I have changed my virtual memory settings
and they look so:
vm.dirty_background_bytes = 0
vm.dirty_bytes = 16777216
vm.dirty_expire_centisecs = 0
vm.dirty_writeback_centisecs = 0
vm.laptop_mode = 1
vm.swappiness = 0
If vm.dirty_bytes is reached all processes are blocked until the dirty
memory (shown in /proc/vmstat as nr_dirty) is flushed. The problem is
that currently all processes get blocked but nr_dirty is not flushed.
The system will hang in an I/O loop until nr_dirty is flushed. If a
process is trying in this time to write something it will hang. This
will make the system unuseable. A workaround is to use the command sync
in this case.
- This can be easily reproduced with the command "dd if=/dev/zero of=hog".
After a second the dd command can't be killed anymore. It will only end after a
sync.
- ---
+ This can be easily reproduced with the command "dd if=/dev/zero
of=/some_ecryptfs_folder/data". After a second the dd command can't be killed
anymore. It will only end after a sync.
+ ---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
- **** List of PLAYBACK Hardware Devices ****
- card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
- Subdevices: 1/2
- Subdevice #0: subdevice #0
- Subdevice #1: subdevice #1
+ **** List of PLAYBACK Hardware Devices ****
+ card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
+ Subdevices: 1/2
+ Subdevice #0: subdevice #0
+ Subdevice #1: subdevice #1
Architecture: amd64
ArecordDevices:
- **** List of CAPTURE Hardware Devices ****
- card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
- Subdevices: 2/2
- Subdevice #0: subdevice #0
- Subdevice #1: subdevice #1
+ **** List of CAPTURE Hardware Devices ****
+ card 0: NVidia [HDA NVidia], device 0: VT1708S Analog [VT1708S Analog]
+ Subdevices: 2/2
+ Subdevice #0: subdevice #0
+ Subdevice #1: subdevice #1
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: sworddragon 16255 F.... plugin-containe
- /dev/snd/pcmC0D0p: sworddragon 16255 F...m plugin-containe
- /dev/snd/timer: sworddragon 16255 f.... plugin-containe
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: sworddragon 16255 F.... plugin-containe
+ /dev/snd/pcmC0D0p: sworddragon 16255 F...m plugin-containe
+ /dev/snd/timer: sworddragon 16255 f.... plugin-containe
Card0.Amixer.info:
- Card hw:0 'NVidia'/'HDA NVidia at 0xf7ff8000 irq 22'
- Mixer name : 'VIA VT1708S'
- Components : 'HDA:11060397,18490397,00100000'
- Controls : 31
- Simple ctrls : 19
+ Card hw:0 'NVidia'/'HDA NVidia at 0xf7ff8000 irq 22'
+ Mixer name : 'VIA VT1708S'
+ Components : 'HDA:11060397,18490397,00100000'
+ Controls : 31
+ Simple ctrls : 19
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order
/var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: No such file
or directory
DistroRelease: Ubuntu 11.10
EcryptfsInUse: Yes
Lspci: Error: [Errno 2] No such file or directory
Lsusb: Error: [Errno 2] No such file or directory
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
NonfreeKernelModules: nvidia
Package: linux (not installed)
PciMultimedia:
-
+
ProcEnviron:
- LANG=de_DE.UTF-8
- SHELL=/bin/bash
+ LANG=de_DE.UTF-8
+ SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-5-generic
root=UUID=c98c50c2-e2c4-4f84-af0f-73d5e54b25fd ro
ProcVersionSignature: Ubuntu 3.0.0-5.6-generic 3.0.0-rc7
Tags: oneiric
Uname: Linux 3.0.0-5-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm audio dialout lpadmin plugdev sambashare sudo
dmi.bios.date: 04/21/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.10
dmi.board.name: N68-S
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP2.10:bd04/21/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnN68-S:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/811654
Title:
I/O deadlock on ecryptfs if the dirty memory is full
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