From: Andreas Karlsson <andreas@proxel.se>
Sent: Wednesday, January 14, 2026 15:27
To: Steven Niu <niushiji@gmail.com>; Pierre <pierre.forstmann@gmail.com>; pgsql-hackers@lists.postgresql.org
<pgsql-hackers@lists.postgresql.org>
Subject: Re: [PATCH] check kernel version for io_method
On 1/14/26 8:22 AM, Steven Niu wrote:
> I agree that you are correct for now. But in future, the IoMethod may have new member. Then we have to process it.
>
> How about change to like this:
> + #else
> + if (*newval == IOMETHOD_IO_URING)
> + {
> + GUC_check_errdetail("io_uring not enabled.");
> + return false;
> + }
No, that would be incorrect. It would not even compile.
IOMETHOD_IO_URING is not even defined if we do not compile with liburing
enabled. You can try it out yourself by compiling PostgreSQL without
io_uring support and then try to enable it. You will get an error and
that code will never be reached.
Andreas
________________________________________
Yes, you are definitely correct.
I'd like to withdwar my proposal.
