Feedback-ID: id4a34324:Fastmail
Date: Tue, 13 Jan 2026 11:59:59 -0500
From: Andres Freund <andres@anarazel.de>
To: "Si, Evan" <evsi@amazon.com>
Cc: surya poondla <suryapoondla4@gmail.com>, 
	"pgsql-bugs@lists.postgresql.org" <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #19369: Not documented that io_uring on kernel versions
 between 5.1 and below 5.6 does not work
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Hi,

On 2026-01-12 21:16:48 +0000, Si, Evan wrote:
> Hi Surya,
> 
> Sure, thanks for the interest. Mainly I think it’d be nice to for the engine
> to behave similarly as it does pre-5.1 and point out that the kernel version
> is too old. Or at least for the README to reflect the minimum kernel version
> (5.6) accurately.

Yea, this clearly is just an oversight. I had forgotten that those operations
weren't available in earlier kernel versions.

While it would be possible to make things work on the older kernel, by
always using the vectorized op on old kernels, I'm doubtful it's worth the
increase in test matrix.

Any chance you want to provide a patch?


Greetings,

Andres Freund