3) xfstests (aka fstests)
Compared the 'consistently fail set' and 'likelyhood to fail' in flaky tests
(see below.)
No regressions.
Details:
---
Source:
- git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
- commit 31f6949f ("ext4: verify unwritten extent conversion in buff-io")
The test set is the 'full' suite (default), not just the 'quick'
group/suite.
The fail set is flaky (some tests fail/pass inconsistently), so the
'consistently fail set' (i.e., fail every time) across 10-20 runs has
been compared between the original/patched kernels.
Also looked for increased likelyhood to fail (i.e., flaky tests that
fail more often with the patches.)
More Details:
---
The xfstests output/log includes the fail set in the 'Failures:' line, and the
kernel version in the 'PLATFORM' line.
For example:
$ grep -e ^Fail -e ^PLATFORM xfstests.log.2020-10-27-13-26-44
PLATFORM -- Linux/s390x mfo-s390x-focal 5.4.0-52-generic
#57-Ubuntu SMP Thu Oct 15 10:52:40 UTC 2020
Failures: btrfs/153 btrfs/200 btrfs/204 btrfs/205 btrfs/213 btrfs/220
btrfs/221 btrfs/222 btrfs/226 generic/166 generic/175 generic/260 generic/286
generic/301 generic/465 generic/484 generic/610
Those two lines from each log/run are used to identify, per kernel version
(original/patched):
- how many runs have been done;
- which tests fail consistently (i.e., in all runs);
- which tests fail inconsistently (i.e., flaky) and how many times (to compare
likelyhood to fail)
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https://bugs.launchpad.net/bugs/1902254
Title:
Bionic: btrfs: kernel BUG at /build/linux-
eTBZpZ/linux-4.15.0/fs/btrfs/ctree.c:3233!
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