From: Joseph Salisbury <joseph.salisbury@canonical.com>
To: vikas.shivappa@linux.intel.com
Cc: stable@vger.kernel.org, linux-kernel@vger.kernel.org,
tglx@linutronix.de, ravi.v.shankar@intel.com,
tony.luck@intel.com, fenghua.yu@intel.com, peterz@infradead.org,
eranian@google.com, ak@linux.intel.com, davidcc@google.com,
mingo@redhat.com, hpa@zytor.com, x86@kernel.org,
1733662@bugs.launchpad.net,
"Roderick W. Smith" <rod.smith@canonical.com>
Subject: [REGRESSION][v4.14.y][v4.15] x86/intel_rdt/cqm: Improve limbo list processing
Date: Fri, 12 Jan 2018 11:22:44 -0500 [thread overview]
Message-ID: <84b8d891-6217-f56d-8ec0-313f7eb317c9@canonical.com> (raw)
Hi Vikas,
A kernel bug report was opened against Ubuntu [0]. After a kernel
bisect, it was found that reverting the following commit resolved this bug:
commit 24247aeeabe99eab13b798ccccc2dec066dd6f07
Author: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Date: Tue Aug 15 18:00:43 2017 -0700
x86/intel_rdt/cqm: Improve limbo list processing
The regression was introduced as of v4.14-r1 and still exists with
current mainline. The trace with v4.15-rc7 is in comment #44[1].
I was hoping to get your feedback, since you are the patch author. Do
you think gathering any additional data will help diagnose this issue,
or would it be best to submit a revert request?
Thanks,
Joe
[0] http://pad.lv/1733662
[1]
https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1733662/comments/44
next reply other threads:[~2018-01-12 16:23 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-12 16:22 Joseph Salisbury [this message]
2018-01-14 11:35 ` [REGRESSION][v4.14.y][v4.15] x86/intel_rdt/cqm: Improve limbo list processing Thomas Gleixner
2018-01-16 13:09 ` Thomas Gleixner
[not found] ` <159B72D0-06FE-4925-A11A-1F8A7741BF70@intel.com>
2018-01-16 16:40 ` Joseph Salisbury
2018-01-16 18:09 ` Thomas Gleixner
2018-01-16 18:34 ` Yu, Fenghua
2018-01-16 18:59 ` Thomas Gleixner
2018-01-17 11:00 ` [tip:x86/urgent] x86/intel_rdt/cqm: Prevent use after free tip-bot for Thomas Gleixner
2018-01-17 20:35 ` [REGRESSION][v4.14.y][v4.15] x86/intel_rdt/cqm: Improve limbo list processing Joseph Salisbury
2018-01-17 22:16 ` Joseph Salisbury
2018-01-17 22:55 ` Thomas Gleixner
2018-01-17 22:59 ` Joseph Salisbury
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