[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2012-06-03 Thread Launchpad Bug Tracker
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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Title:
  lucid lynx going into disk activity frenzy, stalls for minutes

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2012-04-04 Thread Christopher M. Penalver
Romano Giannetti, thank you for reporting this and helping make Ubuntu
better. This bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue?
Can you try with the latest development release of Ubuntu? ISO CD images
are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a
Terminal (Applications->Accessories->Terminal). It will automatically
gather and attach updated debug information to this report.

apport-collect -p linux 

Also, if you could test the latest upstream kernel available that would
be great. It will allow additional upstream developers to examine the
issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once
you've tested the upstream kernel, please remove the 'needs-upstream-
testing' tag. This can be done by clicking on the yellow pencil icon
next to the tag located at the bottom of the bug description and
deleting the 'needs-upstream-testing' text. Please let us know your
results.

Thanks in advance.

** Tags added: regression-release

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

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  lucid lynx going into disk activity frenzy, stalls for minutes

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-07-18 Thread Brad Figg
** Changed in: linux (Ubuntu)
   Status: New => Confirmed

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  lucid lynx going into disk activity frenzy, stalls for minutes

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-07-14 Thread David Oftedal
The scheduler change helps a lot (just as the kernel upgrade helped),
but the underlying problem is obviously still there – When the system
runs out of memory, it starts furiously using the disk, even when it
isn't using swap.

Since the original poster submitted the requested information, I'm
changing the status back to New.

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

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  lucid lynx going into disk activity frenzy, stalls for minutes

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-06-27 Thread David Oftedal
The bug's still there

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

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  lucid lynx going into disk activity frenzy, stalls for minutes

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-06-27 Thread David Oftedal
The problem's still present in 2.6.38, though the stalls are much
shorter. The longest one I've had until the OOM-killer did its job was
about 12 minutes.

Stephane Carrez suggests changing the I/O scheduler to the deadline
scheduler:

http://blog.vacs.fr/index.php?post/2010/08/28/Solving-Linux-system-
lockup-when-intensive-disk-I/O-are-performed

This can be done on a per-disk basis like so:
echo deadline >  /sys/block/sda/queue/scheduler

Or the default can be changed by setting the kernel option elevator to
deadline at boot time. So presumably, in grub.cfg, instead of:

linux /vmlinuz-somethingsomething root=somethingsomething

It should say something like:

linux /vmlinuz-somethingsomething root=somethingsomething
elevator=deadline

The kernel developers have obviously thought long and hard about what
scheduler to choose, but if the deadline scheduler can prevent the
system from stalling for up to 12 minutes each time it runs out of RAM,
with or without swap, then it's possible that the deadline scheduler
would be a better default choice.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-04-20 Thread Launchpad Bug Tracker
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-02-18 Thread David Oftedal
The kernel bug theory seems to hold true, as the problem is much less
severe with kernel 2.6.38. The system is now down to stalling for
seconds at a time instead of hours at a time. An improvement by a factor
of 3600x from one version to the next!

Since the problem appears to be in the process of being solved, I guess
we can say crisis averted.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-01-31 Thread David Oftedal
Definitely still a problem in kernel 2.6.37-12. Today the machine
stalled twice as I was rsyncing some files from one partition to
another.

The first time it lasted for about an hour, during which it was possible
to type in commands, but it literally took an hour to log in and kill a
few processes. The console was littered with messages about kworker-
this-and-that being blocked for more than 120 seconds

The second time it lasted for more than two hours before I pressed the
reset button.

It's wonderful to have some incentives to spend time away from the
computer, of course, but more than three consecutive hours on a busy
night is a bit much. As this seems to be a kernel bug, if not several,
I'm going to assume it won't get fixed.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-01-19 Thread David Oftedal
I've upgraded to kernel 2.6.37-12-generic, and the problem seems to be
much harder to trigger, but it was still possible. It seems to be
triggered by low-memory conditions:

1) I used the KDE file manager and navigated to a directory containing a lot of 
images, so that it started to create thumbnails
2) I started Python and had it create an endless list of junk:

a = list()
while(True):
 a.append(1)

As memory ran out, the entire system started grinding to a halt,
ignoring keyboard and mouse input, dropping network traffic and using
the disk for some mysterious purpose as before (as mentioned, I don't
use swap, so it's not that).

I was able to get to the console eventually and run "top", and top showed two 
things:
1) A high "wa" value, which seems to mean that the CPU is waiting for I/O? But 
that value is at around 13% now, and everything's running smoothly.
2) Python was taking up a great deal of memory.

Killing Python resolved the problem immediately, and nothing else
crashed, unlike with the previous kernel. But that still means that an
unprivileged user running Python can stall the entire system by creating
a list.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-01-19 Thread David Oftedal
There's also a thread on the forums pertaining to what seems to be this and 
several unrelated problems:
http://ubuntuforums.org/showthread.php?t=1478787

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-01-19 Thread David Oftedal
Also, there was an earlier problem with these exact same symptoms which
was said to be due to a race condition triggered when using a swap file
stored on a LUKS-encrypted partition (this is why I no longer use swap).
I still encrypt my /home partition with LUKS, so that could be related
to the problem.

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

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2011-01-19 Thread David Oftedal
This issue stil affects me in Maverick Meerkat. uname -a returns the following:
Linux big-iron 2.6.35-23-generic #41-Ubuntu SMP Wed Nov 24 11:55:36 UTC 2010 
x86_64 GNU/Linux

The bug can be triggered by periods of relatively high disk activity,
but it also seems to generate its own disk activity, and I've no idea
what it's using the disk for. dmesg seems to indicate that there was an
out of memory error at some point, but I'm not using swap, so it
shouldn't involve the disk.

This blog entry - http://billauer.co.il/blog/2010/10/disk-io-scheduler-
load-dd-freeze-stall-hang/ - indicates that it could be a kernel bug,
and so I'm going to put off investigating it further until I've been
able to try that kernel (or have resolved it in some other way).

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-09-28 Thread Jeremy Foshee
This bug report was marked as Incomplete and has not had any updated
comments for quite some time.  As a result this bug is being closed.
Please reopen if this is still an issue in the current Ubuntu
development release http://cdimage.ubuntu.com/daily-live/current/ .
Also, please be sure to provide any requested information that may have
been missing.  To reopen the bug, click on the current status under the
Status column and change the status back to "New".  Thanks.

[This is an automated message.  Apologies if it has reached you
inappropriately; please just reply to this message indicating so.]


** Tags added: kj-expired

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

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-08-29 Thread Josef Grahn
I can confirm this phenomenon on a Dell Dimension with a Pentium D CPU,
2G RAM, running a 64 bit kernel and nVidia card with official nVidia
driver. Swappiness is set to 10.

It appears the system is swapping intensely when it becomes
unresponsive, and sometimes freezes for several minutes with only
occasional mouse pointer updates. The %iowait of the CPU is typically
above 80 during these episodes. It usually happens when running some
memory intensive application(s) (e.g. Chrome with many tabs, Eclipse or
VirtualBox), so it could very well be caused by an actual shortage of
RAM (disappointingly meaning 2 GB is only sufficient for casual desktop
use nowadays).

I would however generally have expected the kernel to handle the
resource shortage better, and not effectively suspend every running
process, as well as mouse and keyboard input, for up to ten minutes.
Especially at times when only one of the memory hungry applications is
being actively used, as the others should be able to be swapped out
completely leaving enough free RAM.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-06-08 Thread Romano Giannetti
I think that the problem is a very bad page release or something like
that. Once entered in the swap frenzy, the system is very difficult to
reconvert. Swapoff do not work (it say no free memory) and I have to
stop VirtualBox, which used half of the memory, to regain control in the
system.

Again, this did not happen at all with Karmic.

If I fill the memory and push the thing to swap it happens again. I use
a little program to fill the mem to test it, attached below.

Exiting VirtualBox resume normal working of the system, until you fill
memory again, when swap starts load average jump high ans system became
really sloppy.


#include 
#include 
int main(int argc, char** argv) {

char * mem; 
long nblocks;
int i;

if (argc!=2) {
fprintf(stderr, "Usage: %s \n", argv[0]);
exit(1);
}

nblocks = atoi(argv[1])*1024;
for(i=0;ihttps://bugs.launchpad.net/bugs/582264
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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-06-08 Thread Romano Giannetti
It happened again, and I could capture a ps augx while in the "frenzy"
phase, that will attach. After that the system is still sluggish, so
that I will have to reboot (or maybe close application and doing a
swapoff/swapon, will try that). I managed too to send apport information
(that was a three-minute task, the disk is almost active all the time).

Load average peaked at 20 or so.


** Attachment added: "ps augx at the top of disk activity frenzy, more or 
less..."
   http://launchpadlibrarian.net/49941459/ps_augx3.txt

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-06-08 Thread Romano Giannetti
apport information

** Tags added: apport-collected

** Description changed:

  Sometime, more or less every 3-4 minutes or when I start a new program, with 
a relatively light load (chromium browser, thunderbird, one VirtualBox session) 
the computers went into frenzy disk activity and grind to a practical halt for 
the next minute or so. Very unresponsive, triggers the "this page do not 
respond" warning from chrome or OOffice... then it resume. 
  I tried to track the culprit without any luck. Reducing vm.swappiness from 60 
to 10 did not help. Cumulative atop for disk usage says: 
  
  
  NPROCS  SYSCPU  USRCPU  VSIZE  RSIZE  RDDSK WRDSK RNET SNET  MEM CMD 
1/4   
   1   1.06s   0.08s   1.0G 836.0M280   48000  42% VirtualBox
   8   0.07s   0.25s   1.2G 174.7M232 000   9% chrome
   1   0.03s   0.13s 246.6M 112.0M  0 000   6% Xorg
   1   0.00s   0.02s 340.5M 74156K  15072 800   4% 
thunderbird-bi
   1   0.00s   0.00s 93692K  9256K  0 000   0% nautilus   
   1   0.01s   0.01s 48844K  5616K   11842400   0% 
gnome-terminal
   1   0.00s   0.00s 41928K  5136K  0 000   0% wnck-applet  
 
  
  and free:
  
  (0)pern:~% free
   total   used   free sharedbuffers cached
  Mem:   20270041977144  49860  0   1184  50012
  -/+ buffers/cache:1925948 101056
  Swap:  3903752 3429763560776
  
  
  This is a Dell n-series, core2 cpu, 2G ram, running a 32 bit kernel, ATI card 
with fglrx module.
  
  Never happened such a thing with Karmic, same load (I know, virtualbox
  use half of the memory, but that was the same in Karmic, with no problem
  at all).
  
  The system is pretty unusable for work.
  
- Will try to reboot in an older kernel, using firefox, and downgrade
- virtualbox to try to find why, but if anyone has a suggestion, it's very
- welcome.
+ Will try to reboot in an older kernel, using firefox, and downgrade 
virtualbox to try to find why, but if anyone has a suggestion, it's very 
welcome.
+ --- 
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
+ Architecture: i386
+ ArecordDevices:
+   List of CAPTURE Hardware Devices 
+  card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
+Subdevices: 2/2
+Subdevice #0: subdevice #0
+Subdevice #1: subdevice #1
+ AudioDevicesInUse:
+  USERPID ACCESS COMMAND
+  /dev/snd/controlC0:  romano 1559 F pulseaudio
+ CRDA: Error: [Errno 2] No such file or directory
+ Card0.Amixer.info:
+  Card hw:0 'Intel'/'HDA Intel at 0xfebdc000 irq 16'
+Mixer name : 'Analog Devices AD1984'
+Components : 'HDA:11d41984,10280211,00100400'
+Controls  : 30
+Simple ctrls  : 18
+ DistroRelease: Ubuntu 10.04
+ Frequency: Once a day.
+ HibernationDevice: RESUME=UUID=75c5b06d-24c3-4a8e-a0f3-cf3b519c35ad
+ IwConfig:
+  lono wireless extensions.
+  
+  eth0  no wireless extensions.
+  
+  vboxnet0  no wireless extensions.
+ MachineType: Dell Inc. OptiPlex 755
+ NonfreeKernelModules: fglrx
+ Package: linux (not installed)
+ ProcCmdLine: root=UUID=fe469c02-94bf-4a0f-a430-32767942a34d ro xforcevesa 
quiet splash
+ ProcEnviron:
+  LANGUAGE=en_GB:en
+  PATH=(custom, user)
+  LANG=en_GB.utf8
+  SHELL=/usr/bin/zsh
+ ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
+ Regression: Yes
+ RelatedPackageVersions: linux-firmware 1.34
+ Reproducible: No
+ RfKill:
+  
+ Tags: lucid  regression-release needs-upstream-testing
+ Uname: Linux 2.6.32-22-generic i686
+ UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev 
plugdev sambashare scanner tape vboxusers video
+ WifiSyslog: Jun  8 10:24:26 pern kernel: [54110.681761] warning: `VirtualBox' 
uses 32-bit capabilities (legacy support in use)
+ WpaSupplicantLog:
+  
+ dmi.bios.date: 08/04/2008
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: A11
+ dmi.board.name: 0DR845
+ dmi.board.vendor: Dell Inc.
+ dmi.chassis.type: 3
+ dmi.chassis.vendor: Dell Inc.
+ dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd08/04/2008:svnDellInc.:pnOptiPlex755:pvr:rvnDellInc.:rn0DR845:rvr:cvnDellInc.:ct3:cvr:
+ dmi.product.name: OptiPlex 755
+ dmi.sys.vendor: Dell Inc.

** Attachment added: "AlsaDevices.txt"
   http://launchpadlibrarian.net/49941319/AlsaDevices.txt

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-06-02 Thread Abdó Roig
Ok, I have to correct myself. I've been using the mainline kernel for a
while now and the problem is definitely still there.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-06-02 Thread Abdó Roig
Same happens to me.

When there is intense disk activity (copying files, installing packages,
etc ...) the whole system becomes extremely slow and unresponsive. This
is quite annoying as it renders the system unusable while copying files
or doing an apt-get upgrade. This definitely did not happen in Karmic.

I have tested a mainline kernel build (linux-
image-2.6.32-0206321405-generic_2.6.32-0206321405_amd64.deb) and the one
from the Maverick liveCD, as suggested above. In both cases things went
smooth, without stalls. I started to copy a large directory, and
simultaneously I could open firefox and navigate without any noticeable
lag. The problem seems to be in the ubuntu lucid kernel then ...

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-25 Thread Jeremy Foshee
Hi Romano,

Please be sure to confirm this issue exists with the latest development release 
of Ubuntu.  ISO CD images are available from 
http://cdimage.ubuntu.com/daily-live/current/ .  If the issue remains, please 
run the following command from a Terminal 
(Applications->Accessories->Terminal).  It will automatically gather and attach 
updated debug information to this report.

apport-collect -p linux 582264

Also, if you could test the latest upstream kernel available that would be 
great.  It will allow additional upstream developers to examine the issue.  
Refer to https://wiki.ubuntu.com/KernelMainlineBuilds .  Once you've tested the 
upstream kernel, please remove the 'needs-upstream-testing' tag.  This can be 
done by clicking on the yellow pencil icon next to the tag located at the 
bottom of the bug description and deleting the 'needs-upstream-testing' text.  
Please let us know your results.

Thanks in advance.

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inappropriately; please just reply to this message indicating so.]


** Tags added: needs-kernel-logs

** Tags added: needs-upstream-testing

** Tags added: kj-triage

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

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-19 Thread Romano Giannetti
Ok, cannot downgrade the kernel because I do not have 2.6.31 headers in
the repositories... grr. I tried to manually install linux-
headers-2.6.31-20 but it fails with missing dependencies.

Please advise.

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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-18 Thread Philippe Gauthier
** Package changed: ubuntu => linux (Ubuntu)

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lucid lynx going into disk activity frenzy, stalls for minutes 
https://bugs.launchpad.net/bugs/582264
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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-18 Thread Romano Giannetti
Trying to assign to kernel package. No luck. Searching for packages say
"too much package to list" or suggest a linux-2.6.32 that then fails.

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lucid lynx going into disk activity frenzy, stalls for minutes 
https://bugs.launchpad.net/bugs/582264
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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-18 Thread Romano Giannetti
No. Happened again without it.

What seems is that when there is disk activity going on, like writing a
big file, the system practically halt.

Probably kernel-related. Testing more.

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lucid lynx going into disk activity frenzy, stalls for minutes 
https://bugs.launchpad.net/bugs/582264
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[Bug 582264] Re: lucid lynx going into disk activity frenzy, stalls for minutes

2010-05-18 Thread Romano Giannetti
hmmm very suspicion culprit: Google Chrome.

Testing more...

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lucid lynx going into disk activity frenzy, stalls for minutes 
https://bugs.launchpad.net/bugs/582264
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