| 2011-03-01 22:24:33 |
Doug Mitchell |
bug |
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added bug |
| 2011-03-01 23:06:41 |
Doug Mitchell |
summary |
TSC is not reliable undex Xen on some Intel CPUs |
TSC is not reliable under Xen on some Intel CPUs |
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| 2011-03-02 10:02:33 |
kng ops |
bug |
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added subscriber kng ops |
| 2011-03-10 03:04:10 |
Doug Mitchell |
attachment added |
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xen-sched-clock-unstable.diff https://bugs.launchpad.net/ubuntu/+source/linux/+bug/727459/+attachment/1897925/+files/xen-sched-clock-unstable.diff |
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| 2011-03-10 17:36:47 |
Brian Murray |
bug |
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added subscriber Jeremy Foshee |
| 2011-03-17 13:11:31 |
Andy Whitcroft |
bug |
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added subscriber Stefan Bader |
| 2011-03-17 13:11:48 |
Andy Whitcroft |
nominated for series |
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Ubuntu Lucid |
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| 2011-03-17 13:11:48 |
Andy Whitcroft |
bug task added |
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linux (Ubuntu Lucid) |
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| 2011-03-17 13:14:32 |
Andy Whitcroft |
linux (Ubuntu Lucid): importance |
Undecided |
Medium |
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| 2011-03-17 13:14:35 |
Andy Whitcroft |
linux (Ubuntu): importance |
Undecided |
Medium |
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| 2011-03-17 13:14:48 |
Andy Whitcroft |
linux (Ubuntu): status |
New |
Triaged |
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| 2011-03-17 13:14:51 |
Andy Whitcroft |
linux (Ubuntu Lucid): status |
New |
Triaged |
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| 2011-03-23 03:19:46 |
Cristian Gafton |
bug |
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added subscriber Cristian Gafton |
| 2011-05-17 01:18:45 |
Chetan Sarva |
bug |
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added subscriber Chetan Sarva |
| 2011-05-17 04:24:12 |
Scott Markwell |
bug |
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added subscriber Scott Markwell |
| 2011-05-17 16:25:13 |
Robbie Williamson |
linux (Ubuntu Lucid): milestone |
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lucid-updates |
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| 2011-05-17 17:05:47 |
Stefan Bader |
linux (Ubuntu): status |
Triaged |
Fix Released |
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| 2011-05-17 17:28:23 |
Stefan Bader |
description |
Ubuntu 10.04.2 LTS
Ubuntu 2.6.32-312.24-ec2 2.6.32.27+drm33.12
Linux 2.6.32-312-ec2 #24-Ubuntu SMP Fri Jan 7 18:30:50 UTC 2011 x86_64 GNU/Linux
We are experiencing impossibly high (thousands of days) accumulated CPU times for processes in ps and top when using the above kernel on Amazon EC2.
Instances running on Intel E5430 are fine, while instances on E5507 all seem to have the problem.
Please see also https://bugzilla.kernel.org/show_bug.cgi?id=16314
Thanks,
Doug |
SRU Justification
Impact: When applying the Xen patchset one endif seems to have gone to the wrong place. So instead of not setting sched_clock_stable it is done all the time.
Fix: Move endif so the whole code segment is covered.
Testcase: Can cause various effects and depends on CPU (see below). Incorrect CPU time but likely also causing the unexplainable process gets stuck or clone/fork issues.
---
Ubuntu 10.04.2 LTS
Ubuntu 2.6.32-312.24-ec2 2.6.32.27+drm33.12
Linux 2.6.32-312-ec2 #24-Ubuntu SMP Fri Jan 7 18:30:50 UTC 2011 x86_64 GNU/Linux
We are experiencing impossibly high (thousands of days) accumulated CPU times for processes in ps and top when using the above kernel on Amazon EC2.
Instances running on Intel E5430 are fine, while instances on E5507 all seem to have the problem.
Please see also https://bugzilla.kernel.org/show_bug.cgi?id=16314
Thanks,
Doug |
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| 2011-05-17 22:29:52 |
hedgehog |
bug |
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added subscriber hedgehog |
| 2011-05-18 00:48:33 |
Eric Hammond |
bug |
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added subscriber Eric Hammond |
| 2011-05-18 15:32:02 |
Jamu Kakar |
bug |
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added subscriber Jamu Kakar |
| 2011-05-18 17:58:23 |
Mark Goris |
bug |
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added subscriber Mark Goris |
| 2011-05-18 20:24:18 |
Launchpad Janitor |
branch linked |
|
lp:ubuntu/lucid-proposed/linux-ec2 |
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| 2011-05-25 11:21:25 |
Alexis Lê-Quôc |
bug |
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added subscriber Alexis Lê-Quôc |
| 2011-06-21 16:26:18 |
Matt Wilson |
bug |
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added subscriber Matt Wilson |
| 2011-07-29 13:04:28 |
Simon Déziel |
bug |
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added subscriber Simon Déziel |
| 2011-10-05 21:45:33 |
Jeremy Foshee |
removed subscriber Jeremy Foshee |
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| 2014-07-28 21:04:28 |
Brad Figg |
nominated for series |
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Ubuntu Trusty |
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| 2014-07-28 21:04:28 |
Brad Figg |
bug task added |
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linux (Ubuntu Trusty) |
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| 2014-07-28 21:04:40 |
Brad Figg |
linux (Ubuntu Trusty): status |
New |
Triaged |
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| 2014-07-28 21:08:34 |
Joe Terranova |
attachment added |
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Sample dmesg log with time jump https://bugs.launchpad.net/ubuntu/+source/linux/+bug/727459/+attachment/4164600/+files/sample%20dmesg.txt |
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| 2014-07-28 21:09:09 |
Joe Terranova |
bug |
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added subscriber Joe Terranova |
| 2014-07-28 21:12:50 |
Joe Terranova |
attachment added |
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full dmesg output https://bugs.launchpad.net/ubuntu/+source/linux/+bug/727459/+attachment/4164601/+files/full%20dmesg.txt |
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| 2014-07-28 21:35:04 |
Joe Terranova |
attachment added |
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dmesg output on 3.13.0-32-generic https://bugs.launchpad.net/ubuntu/+source/linux/+bug/727459/+attachment/4164624/+files/sample%20dmesg%20new.txt |
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| 2015-06-17 11:20:39 |
Rolf Leggewie |
linux (Ubuntu Lucid): status |
Triaged |
Won't Fix |
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