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Linux Kernel Testing Results by Linaro - Jan 23rd 2019 Edition

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By tgall-foo, Junior Member on 23rd January 2019, 09:24 PM
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One of the things that we do at Linaro is testing Linux Kernels to look for kernel regressions. Ideally we want a world where those that make use of Long Term Support Kernels (LTS) are able to depend on and trust the stream of fixes that are being provided such that they end up on devices.

Mobile phone companies, Linux Distros, embedded Linux deployments, etc all generally like the idea of installing one major version of Linux (e.g. 4.9) and sticking with it for the lifetime of their product.

This, and following stories tell how week to week testing of Linux kernels is going, what we’ve found, or better, not found as the kernel versions tick by.

We test using two host user spaces, open embedded and Android.

Open Embedded


4.9.152, 4.14.95, 4.20.4

Reported crashes in v4.20.3–15-g5592f5bf010b which were intentional ‘canaries’ (the canary successfully died)
Reported no regressions in <24h

Reported no regressions in <48h
Bug Status — 57 open bugs

2019–01–22: Anders Roxell sent allmodconfig patches 1 2
2019–01–18: Naresh Kamboju reported kselftest bpf test_netcnt failure re: bug 4245
2019–01–16: Daniel Díaz sent 4 kselftest patches upstream that are being carried in OE


Android 9 / P — 4.4, 4.9, 4.14, 4.19 on HiKey

4.14.94 — no regressions
4.19.16 — Note USB OTG regression and potential eMMC issue documented in the bugs section
4.4.170 — no regressions
4.9.150 — no regressions

Android 8.1–4.4 on HiKey, Android 8.1, 4.14 on X15

4.14.94 / X15 no regressions
4.4.170 / HiKey no regressions

Android 9/P + automerged latest version of LTS 4.4, 4.9, 4.14, 4.19 + HiKey + Latest LTP

This new combination is a work in progress to pull in latest LTP from AOSP-master, as well as using the combination of Android Common + HiKey Linaro (auto merged). It triggers automatically when Android Common is updated right after a new LTS release is merged. This combo thus gives everyone great visibility to test results nearly immediately after an new LTS is available.
We have initial data but are not sharing them as part of this report yet.

AOSP-master tracking with 4.4, 4.9, 4.14, 4.19 on HiKey

These builds are being reworked / repackaged so we’ll have data to report next week.

18 — +2 WtW
New: 4258 OTG with 4.19.17 (and prior) not flipping modes to allow USB keyboards etc
New: 4259 4.19.17 eMMC issue?
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