Re: aio tests failing on newer Linux kernels

From: Aleksander Alekseev <aleksander(at)tigerdata(dot)com>
To: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Cc: Andres Freund <andres(at)anarazel(dot)de>, Alexander Lakhin <exclusion(at)gmail(dot)com>
Subject: Re: aio tests failing on newer Linux kernels
Date: 2026-07-27 13:36:24
Message-ID: CAJ7c6TOxW0zDC7cZXswZS5xC3u3f_3S4qJZmtBsYv11qJwNGVg@mail.gmail.com
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Hi,

> Multiple failures produced recently by debian animals, e.g. [1], [2], [3]:
> pgsql.build/testrun/test_aio/001_aio/log/regress_log_001_aio
> ...
>
> This is reproduced on
> Linux debian-13 6.19.6+deb14-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.19.6-1 (2026-03-06) x86_64 GNU/Linux
> but not reproduced on:
> Linux debian-13 6.12.48+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.48-1 (2025-09-20) x86_64
>
> AI suggests the new behavior is caused by the "io_uring: use region api
> for SQ/CQ" change landed in the kernel version 6.14.

Two cents: I'm on Ubuntu 24.04 with Linux 6.14.0-37-generic and
liburing 2.5 and the tests pass fine for me.

--
Best regards,
Aleksander Alekseev

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