This bug was fixed in the package linux - 3.2.0-33.52
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linux (3.2.0-33.52) precise-proposed; urgency=low
[Luis Henriques]
* Release Tracking Bug
- LP: #1067666
[ Andy Whitcroft ]
* [Config] add fs/udf to linux-image to support DVD/CD formats in virtual
instances
The commit that fixes this issue has already hit the stable kernel
3.2.32 which will be the next Precise SRU. Thus, I'm tagging this bug
as verified (as we don't verify upstream stable updates).
** Tags removed: verification-needed-precise
** Tags added: verification-done-precise
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** Branch linked: lp:ubuntu/precise-proposed/linux-ti-omap4
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https://bugs.launchpad.net/bugs/1057593
Title:
kernel migration threads report bogus high cpu usage
To manage notifications
This bug is awaiting verification that the kernel for Precise in
-proposed solves the problem (3.2.0-33.52). Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-precise' to 'verification-done-precise'.
If verification is not do
** Branch linked: lp:ubuntu/quantal-proposed/linux-ti-omap4
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https://bugs.launchpad.net/bugs/1057593
Title:
kernel migration threads report bogus high cpu usage
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** Branch linked: lp:ubuntu/quantal-proposed/linux-lowlatency
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https://bugs.launchpad.net/bugs/1057593
Title:
kernel migration threads report bogus high cpu usage
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** Changed in: linux (Ubuntu Precise)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1057593
Title:
kernel migration threads report bogus high cpu usage
T
This bug was fixed in the package linux - 3.5.0-16.25
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linux (3.5.0-16.25) quantal-proposed; urgency=low
[ g...@status.e4ward.com ]
* SAUCE: input: Cypress PS/2 Trackpad fix multi-source, double-click
- LP: #1055788
[ Tim Gardner ]
* [Config] revert '[Config] enable
** Changed in: linux (Ubuntu Quantal)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Precise)
Status: Confirmed => In Progress
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The attachment "lp1057593 precise backport fix" of this bug report has
been identified as being a patch. The ubuntu-reviewers team has been
subscribed to the bug report so that they can review the patch. In the
event that this is in fact not a patch you can resolve this situation by
removing the
** Description changed:
When running a workload that frequently migrates threads, when cpu usage
shows bogus values.
This is present in 12.04, but not present in 10.10.
It is expected that when running this workload the cpu usage would be
reported correctly.
One can verify this by run
** Patch added: "lp1057593 quantal backport fix"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1057593/+attachment/3348890/+files/0001-sched-Fix-migration-thread-runtime-bogosity.patch
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This also affects quantal.
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https://bugs.launchpad.net/bugs/1057593
Title:
kernel migration threads report bogus high cpu usage
To manage notifications about this bug go to:
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** Patch added: "lp1057593 precise backport fix"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1057593/+attachment/3348881/+files/0001-sched-Fix-migration-thread-runtime-bogosity.patch
** Changed in: linux (Ubuntu Precise)
Assignee: (unassigned) => Chris J Arges (christopherarges)
This particular patch fixes the issue:
http://git.kernel.org/?p=linux/kernel/git/tip/tip.git;a=commitdiff;h=8f6189684eb4e85e6c593cd710693f09c944450a
It has been tested and shown that workloads that trigger this report
more reasonable cpu usage.
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