[Bug 609643] [NEW] kernel BUG at /build/buildd/linux-2.6.32/fs/ext4/extents.c:1716 makes most programs freeze few minutes after boot

[rflores]

Public bug reported:

Hi,

I noticed two facts which can be related to this bug.

* First, few time after kernel upgrade to 2.6.32-24, I got some programs freezing and leading the computer to be unusable. I mean, there was not complete freeze: ie. mouse cursor, time and window moves still worked, but majority of running apps (firefox, chrome, transmissionBT, nautilus, etc.) were freezing and turned grey, while trying to open other apps was not possible. Even log in tty1 failed: prompt never came after login. Elsewhere, network activity was stopping immediately when the bug occurred. Concerning the CPU usage, it was not at max, about 10-30%, nothing extraordinary.
Taking a look at system-monitor (which had not frozen, as I remember) showed that status of processes which had frozen were tagged as "ininterruptible". I discover that jdb2 was also tagged "ininterruptible", I don't know why, but kernel.log showed following entry several times about 17 seconds after boot (cf. dmesg or syslog): 
"JBD: barrier-based sync failed on md0-8 - disabling barriers"

* In addition, I noticed this bug appeared equally after copying huge
data in my /home partition making it full at 95% (with less than 5% free
space), I don't know if this is linked, because since I have deleted
these files and made /home partition less loaded, the freezes did not
reappear...

I have tried to use current mainline-kernel: 2.6.35-999-generic, but the
behaviour was identical, so I came back to stable kernel (as you can see
in log files). The only fact I noticed that resolved the problem was
making free space available in my /home partition as said above. For
testing, I have tried to make this partition full at 99%, but the
computer is ON since 1h40 now, but nothing to report currently...

Attached files show several "cut here" statements in syslog, 8/10 concerns: 
"last sysfs file: /sys/devices/pci0000:00/0000:00:06.0/0000:02:00.0/net/eth0/statistics/collisions"
The 2 other are related to:
"last sysfs file: /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"

Hope that helps.

ps: I will attach complete syslog of the day, from kernel upgrade to
resolved problem...

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-24-generic 2.6.32-24.38
Regression: No
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-24.38-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  rflores    1626 F.... pulseaudio
 /dev/snd/controlC1:  rflores    1626 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'SB'/'HDA ATI SB at 0xfe024000 irq 16'
   Mixer name	: 'Realtek ALC887'
   Components	: 'HDA:10ec0887,1458a002,00100202'
   Controls      : 40
   Simple ctrls  : 22
Card1.Amixer.info:
 Card hw:1 'camera'/'USB camera at usb-0000:00:13.1-3, full speed'
   Mixer name	: 'USB Mixer'
   Components	: 'USB045e:00f7'
   Controls      : 3
   Simple ctrls  : 2
Card2.Amixer.info:
 Card hw:2 'HDMI'/'HDA ATI HDMI at 0xfdffc000 irq 19'
   Mixer name	: 'ATI RS690/780 HDMI'
   Components	: 'HDA:1002791a,00791a00,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card2.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [off]
Date: Sun Jul 25 02:55:11 2010
Frequency: I don't know.
HibernationDevice: RESUME=UUID=ad2dc738-34d8-4f66-92f9-7b3d22702c61
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100427.1)
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
MachineType: Gigabyte Technology Co., Ltd. GA-MA74GM-S2H
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=e561f624-e8b8-4731-ba7e-be40b0c0c655 ro quiet splash
ProcEnviron:
 LANG=fr_FR.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.1
RfKill:
 
SourcePackage: linux
dmi.bios.date: 12/21/2009
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: FBi
dmi.board.name: GA-MA74GM-S2H
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrFBi:bd12/21/2009:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA74GM-S2H:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA74GM-S2H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-MA74GM-S2H
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 kconfig kernel-bug lucid

-- 
kernel BUG at /build/buildd/linux-2.6.32/fs/ext4/extents.c:1716 makes most programs freeze few minutes after boot
https://bugs.launchpad.net/bugs/609643
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