ACK: [SRU][Q][PATCH 0/1] ubuntu_blktrace_smoke_test fails on questing with rust coreutils (LP: #2137698)

[Mehmet Basaran]

Acked-by: Mehmet Basaran<mehmet.basaran at canonical.com>

On 1/8/26 13:25, Edoardo Canepa wrote:
> BugLink: https://bugs.launchpad.net/bugs/2137698
>
> SRU Justification:
>
> [Impact]
>
> ubuntu_blktrace_smoke_test fails on questing with rust coreutils enabled.
> Executing with GNU coreutils makes the test pass.
>
>    ID: com.canonical.kernel::ubuntu_blktrace_smoke_test/blktrace-smoke-test
>    Category: com.canonical.plainbox::uncategorised
>    ... 8<
> -------------------------------------------------------------------------
>    PASSED (CONFIG_BLK_DEV_IO_TRACE=y in /boot/config-6.17.0-11-generic)
>
>    Using block device /dev/loop0 for path /tmp/cwd-
> hmzznri9.43f7bf5d91458d09dc595f27a2105298dbd7be4196a6f7444786bd783e1e92a1/mnt
>
>    Test regime:
>     dd performing 65536 1K block writes
>     looking for at least 1024 blktrace events
>
>    Sat Dec 20 19:52:16 UTC 2025: blktrace starting
>    Sat Dec 20 19:52:16 UTC 2025: dd starting
>    Sat Dec 20 19:52:16 UTC 2025: dd stopped
>    Sat Dec 20 19:52:16 UTC 2025: waiting for 10 seconds
>    Sat Dec 20 19:52:26 UTC 2025: blktrace being terminated
>    Sat Dec 20 19:52:26 UTC 2025: blktrace terminated
>    Sat Dec 20 19:52:26 UTC 2025: blktrace data parsed
>
>    FAILED (expecting at least 1024 block traces events from the dd process,
> got 0)
>    FAILED (expecting at least 1024 block read traces events, got 0)
>    FAILED (expecting at least 1024 block write traces events, got 0)
>
> [Fix]
>
> Revert commit "ext4: fail unaligned direct IO write with EINVAL".
>
> [Test Plan]
>
> To reproduce the issue:
> execute ubuntu_blktrace_smoke_test
>
> with the reverted commit the test should pass as before the commit was pulled.
>
> [Where problems could occur]
>
> The regression potential is low, since this commit was actually a cleanup of an unnecessary error condition.
>
> That said, further investigation should be made as to why it behaves differently on rust and GNU coreutils.
>