Note this patch turned out to be buggy and was fixed upstream in commit
728e5653e6fdb, prior to being merged into 3.18-rc1. Unfortunately the
fix has not made it into Utopic yet. See Bug #1386473.
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This bug was fixed in the package linux - 3.16.0-20.27
---
linux (3.16.0-20.27) utopic; urgency=low
[ Tim Gardner ]
* [Config] CONFIG_CXL=m
* Release Tracking Bug
- LP: #1376354
[ Andi Kleen ]
* SAUCE: perf tools: Fix perf record as non root with kptr_restrict == 1
** Also affects: linux (Ubuntu Utopic)
Importance: Medium
Assignee: Canonical Kernel Team (canonical-kernel-team)
Status: Triaged
** Changed in: linux (Ubuntu Utopic)
Status: Triaged = Fix Committed
** Changed in: linux (Ubuntu Utopic)
Assignee: Canonical Kernel Team
A fix for this issue has been mergd in to the tip tree. It will likely
be in the 3.18 kernel.
http://git.kernel.org/tip/cebf15eb09a2fd2fa73ee4faa9c4d2f813cf0f09
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** Changed in: linux (Ubuntu)
Status: Confirmed = Triaged
** Changed in: linux (Ubuntu)
Assignee: (unassigned) = Canonical Kernel Team (canonical-kernel-team)
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** Patch added: ignore-mc-sanity-check.patch
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338919/+attachment/4208094/+files/ignore-mc-sanity-check.patch
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This is definitely a kernel bug. Essentially, we're reporting out NUMA
information in cpuinfo when we should be reporting out information about
the CPU itself. I'm working on an upstream kernel patch. I have a
patch available for testing that I can attach to this bug, although I'm
unsure this
** Tags added: patch
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https://bugs.launchpad.net/bugs/1338919
Title:
[F06A]The information - CPU cores is incorrect in Ubuntu14.04 cpuinfo.
To manage notifications about this bug go
** Attachment added: CPU_COD-disabled.txt
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338919/+attachment/4202433/+files/CPU_COD-disabled.txt
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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It's been noticed that the COD (cluster-on-die) is enabled in BIOS, the
cpuinfo reports 5 cores instead of 10 cores. If COD is disabled, then it
reports 10 cores as expected.
Cluster On Die can be understood as if you split the CPU and LLC into
two parts that behave like two CPUs in NUMA. The OS
** Changed in: linux (Ubuntu)
Status: Incomplete = New
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https://bugs.launchpad.net/bugs/1338919
Title:
[F06A]The information - CPU cores is incorrect in Ubuntu14.04 cpuinfo.
To
1.I can’t type “apport-collect 1338919” successfully, it will display a message
like below link.
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1277794
2.Update the kernel to 3.16, this issue still exist, please refer to attached
files.
** Attachment added: 3.16.zip
** Summary changed:
- The information - CPU cores is incorrect in Ubuntu14.04 cpuinfo.
+ [F06A]The information - CPU cores is incorrect in Ubuntu14.04 cpuinfo.
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