| 2011-09-19 17:32:23 |
Scott Moser |
bug |
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added bug |
| 2011-09-19 17:35:23 |
Brad Figg |
linux (Ubuntu): status |
New |
Incomplete |
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| 2011-09-19 18:06:09 |
Scott Moser |
linux (Ubuntu): status |
Incomplete |
Confirmed |
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| 2011-09-19 18:15:46 |
Ben Howard |
linux (Ubuntu): importance |
Undecided |
Medium |
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| 2011-09-26 10:59:57 |
Lauri Ojansivu |
bug |
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added subscriber Lauri Ojansivu |
| 2011-09-26 14:46:09 |
Stefan Bader |
attachment added |
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[PATCH] x86_paravirt: Partially revert "remove lazy mode in interrupts".txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/854050/+attachment/2463498/+files/%5BPATCH%5D%20x86_paravirt%3A%20Partially%20revert%20%22remove%20lazy%20mode%20in%20interrupts%22.txt |
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| 2011-09-27 16:49:56 |
Dave Walker |
tags |
amd64 apport-bug ec2-images natty |
amd64 apport-bug ec2-images natty server-o-ro |
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| 2011-10-01 11:13:27 |
Matt Nordhoff |
bug |
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added subscriber Matt Nordhoff |
| 2011-10-16 20:26:21 |
Dave Walker |
bug |
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added subscriber ubuntu-server-release-tracking-other |
| 2011-10-17 12:15:54 |
Ubuntu Foundations Team Bug Bot |
tags |
amd64 apport-bug ec2-images natty server-o-ro |
amd64 apport-bug ec2-images natty patch server-o-ro |
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| 2011-10-17 12:15:55 |
Ubuntu Foundations Team Bug Bot |
bug |
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added subscriber Joseph Salisbury |
| 2011-10-18 15:04:44 |
Stefan Bader |
description |
I'm filing this bug in response to threads at [1] and [2]. From those threads, we see reported that
* the instance becomes unavailable.
* the issue is reported to have to have been seen multiple different instance types
[TYPE: m2.xlarge, m1.large, t1.micro ( all types have hung ) ]
* at [2] there is BUG_ON output pointing at swap, but I would not have expected a user of an m2.xlarge to be using swap, so I personally suspect that that hang is different.
[1] http://groups.google.com/group/ec2ubuntu/browse_frm/thread/57ff20c6370f7bb9
[2] https://forums.aws.amazon.com/message.jspa?messageID=262300
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-virtual 2.6.38-8.42
ProcVersionSignature: User Name 2.6.38-8.42-virtual 2.6.38.2
Uname: Linux 2.6.38-8-virtual x86_64
AlsaDevices:
total 0
crw------- 1 root root 116, 1 2011-09-19 17:02 seq
crw------- 1 root root 116, 33 2011-09-19 17:02 timer
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
CurrentDmesg: [ 16.930013] eth0: no IPv6 routers present
Date: Mon Sep 19 17:23:59 2011
Ec2AMI: ami-1aad5273
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: t1.micro
Ec2Kernel: aki-427d952b
Ec2Ramdisk: unavailable
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: root=LABEL=uec-rootfs ro console=hvc0
ProcModules: acpiphp 24097 0 - Live 0x0000000000000000
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install) |
SRU Justification:
Impact: An upstream change in 2.6.31 tried to simplify the conditions of having the lazy mmu mode in paravirt disabled. With that in mind several instances where the lazy mmu mode was disabled explicitly have been removed. However it was found that from k(un)map_atomic there is a chance to cause an oops.
Fix: The following patch has been sent upstream (currently it is only in the -mm tree and linux-next). It has been tested to fix the problem on 2.6.38. The specific symptom seen, seems to have come up since 2.6.37, however the lines of code that are re-introduced have been removed since 2.6.31.
Testcase: Trying to do forks under high load should trigger the issue (at least on 2.6.37+ kernels)
--
I'm filing this bug in response to threads at [1] and [2]. From those threads, we see reported that
* the instance becomes unavailable.
* the issue is reported to have to have been seen multiple different instance types
[TYPE: m2.xlarge, m1.large, t1.micro ( all types have hung ) ]
* at [2] there is BUG_ON output pointing at swap, but I would not have expected a user of an m2.xlarge to be using swap, so I personally suspect that that hang is different.
[1] http://groups.google.com/group/ec2ubuntu/browse_frm/thread/57ff20c6370f7bb9
[2] https://forums.aws.amazon.com/message.jspa?messageID=262300
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-virtual 2.6.38-8.42
ProcVersionSignature: User Name 2.6.38-8.42-virtual 2.6.38.2
Uname: Linux 2.6.38-8-virtual x86_64
AlsaDevices:
total 0
crw------- 1 root root 116, 1 2011-09-19 17:02 seq
crw------- 1 root root 116, 33 2011-09-19 17:02 timer
AplayDevices: Error: [Errno 2] No such file or directory
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
CurrentDmesg: [ 16.930013] eth0: no IPv6 routers present
Date: Mon Sep 19 17:23:59 2011
Ec2AMI: ami-1aad5273
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: t1.micro
Ec2Kernel: aki-427d952b
Ec2Ramdisk: unavailable
Lspci:
Lsusb: Error: command ['lsusb'] failed with exit code 1:
ProcEnviron:
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: root=LABEL=uec-rootfs ro console=hvc0
ProcModules: acpiphp 24097 0 - Live 0x0000000000000000
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install) |
|
| 2011-10-18 16:35:40 |
Stefan Bader |
nominated for series |
|
Ubuntu Natty |
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| 2011-10-18 16:35:40 |
Stefan Bader |
bug task added |
|
linux (Ubuntu Natty) |
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| 2011-10-18 16:35:40 |
Stefan Bader |
nominated for series |
|
Ubuntu Oneiric |
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| 2011-10-18 16:35:40 |
Stefan Bader |
bug task added |
|
linux (Ubuntu Oneiric) |
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| 2011-10-18 16:41:14 |
Stefan Bader |
attachment added |
|
Backport to Maverick/Lucid https://bugs.launchpad.net/ubuntu/+source/linux/+bug/854050/+attachment/2557824/+files/0002-UBUNTU-SAUCE-x86-paravirt-Partially-revert-remove-la.patch |
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| 2011-10-18 20:19:06 |
Ubuntu Foundations Team Bug Bot |
bug |
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added subscriber Ubuntu Review Team |
| 2011-10-19 15:18:10 |
Stefan Bader |
linux (Ubuntu Natty): importance |
Undecided |
Medium |
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| 2011-10-19 15:18:10 |
Stefan Bader |
linux (Ubuntu Natty): status |
New |
Fix Committed |
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| 2011-10-19 15:18:10 |
Stefan Bader |
linux (Ubuntu Natty): assignee |
|
Stefan Bader (stefan-bader-canonical) |
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| 2011-10-19 15:18:30 |
Stefan Bader |
linux (Ubuntu Oneiric): importance |
Undecided |
Medium |
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| 2011-10-19 15:18:30 |
Stefan Bader |
linux (Ubuntu Oneiric): status |
New |
Fix Committed |
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| 2011-10-19 15:18:30 |
Stefan Bader |
linux (Ubuntu Oneiric): assignee |
|
Stefan Bader (stefan-bader-canonical) |
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| 2011-10-19 15:18:54 |
Stefan Bader |
bug |
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added subscriber Ubuntu Stable Release Updates Team |
| 2011-11-11 14:51:24 |
Herton R. Krzesinski |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro |
amd64 apport-bug ec2-images natty patch server-o-ro verification-needed-natty |
|
| 2011-11-15 19:53:10 |
Lauri Ojansivu |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro verification-needed-natty |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty |
|
| 2011-11-18 21:50:18 |
Eric Hammond |
bug |
|
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added subscriber Eric Hammond |
| 2011-11-21 17:06:45 |
Viktor Szathmary |
bug |
|
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added subscriber Viktor Szathmary |
| 2011-11-24 16:12:14 |
Herton R. Krzesinski |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-needed-oneiric |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
linux (Ubuntu Natty): status |
Fix Committed |
Fix Released |
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| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
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2011-2183 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
|
2011-2491 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
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2011-2494 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
|
2011-2495 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
|
2011-2517 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
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2011-2905 |
|
| 2011-11-28 06:30:03 |
Launchpad Janitor |
cve linked |
|
2011-2909 |
|
| 2011-11-29 17:18:35 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/lucid-updates/linux-lts-backport-natty |
|
| 2011-11-29 21:49:20 |
Lauri Ojansivu |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-needed-oneiric |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-done-oneiric |
|
| 2011-11-30 17:47:47 |
Herton R. Krzesinski |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-done-oneiric |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-needed-oneiric |
|
| 2011-11-30 18:15:53 |
Rolf Timmermans |
tags |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-needed-oneiric |
amd64 apport-bug ec2-images natty patch server-o-ro verification-done-natty verification-done-oneiric |
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| 2011-12-03 05:30:12 |
Launchpad Janitor |
linux (Ubuntu): status |
Confirmed |
Fix Released |
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| 2011-12-09 23:46:10 |
Launchpad Janitor |
linux (Ubuntu Oneiric): status |
Fix Committed |
Fix Released |
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| 2011-12-14 13:36:28 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/lucid-proposed/linux-lts-backport-oneiric |
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