This bug was fixed in the package linux - 4.15.0-88.88
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linux (4.15.0-88.88) bionic; urgency=medium
* bionic/linux: 4.15.0-88.88 -proposed tracker (LP: #1862824)
* Segmentation fault (kernel oops) with memory-hotplug in
ubuntu_kernel_selftests on Bionic kernel (LP: #186231
Thank you Khaled! I've just checked the source from bionic-proposed
(4.15.0-88) and the patch is there, as expected - I've verified that
comparing with the upstream patch, it's all correct.
Given we don't have the HW and the bug reporter seems to be unable to
verify it (and the patch is self-conta
Thanks @gpiccoli
Doing the same for bionic, based on the same logic as comment #12
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verifica
This bug was fixed in the package linux - 5.0.0-40.44
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linux (5.0.0-40.44) disco; urgency=medium
* disco/linux: 5.0.0-40.44 -proposed tracker (LP: #1859724)
* use-after-free in i915_ppgtt_close (LP: #1859522) // CVE-2020-7053
- SAUCE: drm/i915: Fix use-after-free when dest
Unfortunately seems we don't have hardware to fully verify the patch.
But given it's a minor fix, restricted to a single driver and upstream
for a while (also, it's on E/F already), I consider that safe to ship
without full verification.
Also, I've download the Disco kernel source, and validated t
I reached out to phausman on #canonical-support
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Title:
qede driver causes 100% CPU load
To manage notifications about this bug go to:
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This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
disco' to 'verification-done-disco'. If the problem still exists, change
the tag 'verificati
** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => Fix Committed
** Changed in: linux (Ubuntu Disco)
Status: Confirmed => Fix Committed
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** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Disco)
Importance: Undecided => Medium
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Ti
SRU submitted today:
https://lists.ubuntu.com/archives/kernel-team/2019-December/106479.html
Cheers,
Guilherme
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Title:
qede driver causes 100%
** Description changed:
- This bug is similar to #1832082 (bnx2x driver causes 100% CPU load) but
- applies for qede driver instead of bnx2x. The symptoms are the same:
+ [Impact]
- With chrony installed, and configured with "hwtimestamp *", I observe
- 100% CPU load on 2 CPU cores.
+ * The PTP
Hi Przemyslaw, thank you for the great report and debug! I'll proceed with the
SRU proposal.
Cheers,
Guilherme
** Tags added: disco sts
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Title:
@gpiccoli, I can now confirm that I've been running the system with the
test kernel from your PPA for a day and the issue did not appear
anymore. Looks like the upstream commit fixes the problem.
Thanks a lot for figuring it out and for providing the test kernel!
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The kernel commit 9adebac37e7d ("qede: Handle infinite driver spinning
for Tx timestamp.") is present in kernels 5.3 and subsequent ones, and
after some preliminary results from @phausman, seems the commit properly
fixes the issue.
Hence, we will start the SRU process for Bionic/Disco.
Cheers,
G
** Changed in: linux (Ubuntu Focal)
Status: Incomplete => Fix Released
** Changed in: linux (Ubuntu Eoan)
Status: Incomplete => Fix Released
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I've built a kernel for Bionic with the commit 9adebac37e7d ("qede: Handle
infinite driver spinning for Tx timestamp.") in order to validate if such patch
fixes or at least alleviate the symptom.
It's built on the following PPA:
https://launchpad.net/~gpiccoli/+archive/ubuntu/test1855409
@phaus
Thanks for the report @phausman! I've checked mainline and there's a
commit that matches your report, we should try this one: 9adebac37e7d
("qede: Handle infinite driver spinning for Tx timestamp.") [0].
This is present in Eoan and Focal, but not in Bionic/Disco. After we
confirm this is the fix w
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: Incomplete
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Xenial)
** Attachment added: "perf-report.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1855409/+attachment/5310185/+files/perf-report.txt
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