[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Brad Figg]

** Tags added: cscc

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  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Joe Button]

I have issue and my root partition is ext4. `mount` is full of other
crap I don't understand but I don't think any of it's "real" drives.

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[jeremy-list]

I am using btrfs for both / and /home. I was originally using it only
for /home (and ext4 on /); but force-resetting due to this bug would
occasionally render my system unbootable.

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Prasad]

Just out of curiosity, who's is using btrfs. It doesn't matter whether
you have /home or / on btrfs. I am not certain whether it plays any
role, but it seems to be the common denominator in my tests.

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  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Daen WWW]

Solved on my system:
On lower spec systems (4GB RAM) the default swap file in /dev/dm-1 of 1GB is 
insufficient.

Addition of new swap file has resolved the stated issues.

Filename Type Size Used Priority
/swapfile file 4194300 2828 -2
/dev/dm-1 partition 999420 0 -3

digitalocean.com/community/tutorials/how-to-add-swap-space-on-
ubuntu-18-04

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Daen WWW]

I am having the exact same problem Bionic 18.04 x64 system kernel 
4.15.0-34-generic
.
I have just had too hard reboot the system to regain control after waiting a 
hour of thrashing. All input devices are locked.
As my system has too remain up all day this issue needs to be resolved to avoid 
HDD damage.

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Dimitri Pappas]

Seems to be related to 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748408
Memory management issues since a commit on a kernel revision somewhere for 4.11 
or 4.12. I'm sticking to 4.10.0-28 until resolved

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  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Luca Olivetti]

I tried 4.15 rc9 from http://kernel.ubuntu.com/~kernel-
ppa/mainline/v4.15-rc9/ but it still has the problem (I just waited 15
minutes before the magic sysrq sequence but I think that's enough ).

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  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Luca Olivetti]

Since this bug appeared when I upgraded from zesty to artful, I reverted to 
4.10.0-37 (the last kernel I had in zesty) and it had been rock-solid (it 
becomes unresponsive from time to time but it recovers in a few seconds).
With each kernel upgrade I try the new one but the problem is still there 
(though I did not try 4.13.0-31, but I don't see anything in its changelog 
regarding this bug).
I also tried the BFQ scheduler, (as suggested to me here  
http://ubuntu.5.x6.nabble.com/Bad-memory-swap-management-in-17-10-td5160226.html)
 but it didn't resolve the issue.
Regarding the previous comment than "4 GBs ram is quite small", 4.10.0 manages 
quite well the same workload (I have 8Gb but four are eaten by virtualbox).

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Title:
  System frequently becomes completely unresponsive due to thrashing

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Re: [Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Kai-Heng Feng]

> On 3 Nov 2017, at 12:40 PM, jeremy-list  wrote:
> 
> I have tried a few different swappiness values.
> 60: The problem will happen about three times per day
> 10: The problem will happen about once per hour
> 90: The problem will happen about once per day.

4 GBs Ram is quite small in today’s standard.

I think higher swappiness value is your only choice other than actually
adding ram to your laptop.

> 
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> in Ubuntu.
> https://bugs.launchpad.net/bugs/1722778
> 
> Title:
>  System frequently becomes completely unresponsive due to thrashing
> 
> Status in linux package in Ubuntu:
>  Confirmed
> 
> Bug description:
>  To replicate:
> 
>  Run firefox for a couple of hours.
> 
>  Expected results:
> 
>  All open applications should run normally: occasional slowdown for
>  page faults are tolerable but the observed behaviour is not.
> 
>  Actual results:
> 
>  Several times per day my computer will become completely unresponsive
>  apart from high hard disk activity. Once it enters this state: it will
>  not recover without a hard reset regardless of any time waited or
>  input given. On one occasion I have tested it by leaving it thrashing
>  for 12 hours, at the end of which there was no evidence of progress.
> 
>  This behaviour was not observed when running Ubuntu 16.04 on the same
>  computer and swap settings.
> 
>  ProblemType: Bug
>  DistroRelease: Ubuntu 17.10
>  Package: linux-image-4.13.0-12-generic 4.13.0-12.13
>  ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
>  Uname: Linux 4.13.0-12-generic x86_64
>  ApportVersion: 2.20.7-0ubuntu2
>  Architecture: amd64
>  AudioDevicesInUse:
>   USERPID ACCESS COMMAND
>   /dev/snd/pcmC0D0p:   jeremy 3367 F...m pulseaudio
>   /dev/snd/controlC0:  jeremy 3367 F pulseaudio
>  CurrentDesktop: ubuntu:GNOME
>  Date: Thu Oct 12 00:41:01 2017
>  EcryptfsInUse: Yes
>  HibernationDevice: RESUME=UUID=6ef78518-5d77-4673-9917-36ed31b247d9
>  InstallationDate: Installed on 2017-08-15 (56 days ago)
>  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 
> (20170215.2)
>  MachineType: LENOVO 80TV
>  ProcFB: 0 inteldrmfb
>  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.13.0-12-generic 
> root=UUID=f2087105-8407-42b8-af6c-f00fe6846c51 ro rootflags=subvol=@ quiet 
> splash vt.handoff=7
>  RelatedPackageVersions:
>   linux-restricted-modules-4.13.0-12-generic N/A
>   linux-backports-modules-4.13.0-12-generic  N/A
>   linux-firmware 1.169
>  SourcePackage: linux
>  UpgradeStatus: Upgraded to artful on 2017-09-14 (27 days ago)
>  dmi.bios.date: 03/07/2017
>  dmi.bios.vendor: LENOVO
>  dmi.bios.version: 3JCN26WW
>  dmi.board.asset.tag: NO Asset Tag
>  dmi.board.name: VIUU4
>  dmi.board.vendor: LENOVO
>  dmi.board.version: SDK0K17763 WIN
>  dmi.chassis.asset.tag: NO Asset Tag
>  dmi.chassis.type: 10
>  dmi.chassis.vendor: LENOVO
>  dmi.chassis.version: Lenovo ideapad 310-15IKB
>  dmi.modalias: 
> dmi:bvnLENOVO:bvr3JCN26WW:bd03/07/2017:svnLENOVO:pn80TV:pvrLenovoideapad310-15IKB:rvnLENOVO:rnVIUU4:rvrSDK0K17763WIN:cvnLENOVO:ct10:cvrLenovoideapad310-15IKB:
>  dmi.product.family: IDEAPAD
>  dmi.product.name: 80TV
>  dmi.product.version: Lenovo ideapad 310-15IKB
>  dmi.sys.vendor: LENOVO
> 
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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[jeremy-list]

I have tried a few different swappiness values.
60: The problem will happen about three times per day
10: The problem will happen about once per hour
90: The problem will happen about once per day.

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[jeremy-list]

Once it has happened there is no way to check RAM usage because
keyboard, mouse, and network devices all become completely unresponsive.
I have 3.8 GiB of RAM installed. On the occasions when I have checked
RAM usage shortly before it happened: total RAM usage was 3.8GiB. I have
19.1GiB of swap space enabled, but this problem will happen when swap
usage is still around 10MiB.

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Kai-Heng Feng]

What's your swappiness value?

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Kai-Heng Feng]

How much ram does Firefox use when this happens?

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[jeremy-list]

Any chance of progress being made on this bug? It's become quite rare
for me to get a full day of system uptime!

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Title:
  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[jeremy-list]

My computer cannot boot the v4.14-rc4 kernel because the amd64 package is a 
failed build and my motherboard does not support 32 bit operating systems.
Running the v4.14rc3 mainline kernel I was unable to connect to the internet, 
(so could not get firefox to use enough memory to reproduce the bug), but the 
attached C++ program made my computer become completely unresponsive in under a 
second.

** Attachment added: "testthrash.cpp"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1722778/+attachment/4968205/+files/testthrash.cpp

** Changed in: linux (Ubuntu)
   Status: Incomplete => Confirmed

** Tags added: kernel-bug-exists-upstream

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  System frequently becomes completely unresponsive due to thrashing

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[Bug 1722778] Re: System frequently becomes completely unresponsive due to thrashing

[Joseph Salisbury]

Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.14 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as
"Confirmed".


Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc4

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu)
   Status: Confirmed => Incomplete

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  System frequently becomes completely unresponsive due to thrashing

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