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From: Michael Paquier <[email protected]>
To: Andres Freund <[email protected]>
Cc: Ashutosh Bapat <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: GetBufferDescriptor() being called for local buffers from MarkBufferDirtyHint()
Date: Thu, 11 Jun 2026 07:14:33 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <hfz3gif4frhxacjsqjjxhcxs4uacgbtrvjwyjzzhejvtj75v65@wq6xllusmmqn>
References: <CAExHW5uzRMYVZsXXS3HXXT0fG_sNrpUhUqwP4NorhaCqH9JDhA@mail.gmail.com>
	<[email protected]>
	<hfz3gif4frhxacjsqjjxhcxs4uacgbtrvjwyjzzhejvtj75v65@wq6xllusmmqn>

On Wed, Jun 10, 2026 at 10:36:22AM -0400, Andres Freund wrote:
> I think it *should* blow up. It doesn't because we're lacking assertions in
> GetBufferDescriptor(). But I don't think the assertions added in the patch are
> quite right.
> 
> We can't trivially add the correct assertions, because somebody though it was
> a good idea to give GetBufferDescriptor() a uint32 parameter, which seems
> completely wrong to me.

This one is not as old as I expected: 3ac88fddd92c.  You're right that
switching that to be signed would be a correct first step forward.
--
Michael


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