Feedback-ID: id4a34324:Fastmail
Date: Wed, 14 Jan 2026 10:20:02 -0500
From: Andres Freund <andres@anarazel.de>
To: Melanie Plageman <melanieplageman@gmail.com>
Cc: Kirill Reshke <reshkekirill@gmail.com>, 
	Heikki Linnakangas <hlinnaka@iki.fi>, Matthias van de Meent <boekewurm+postgres@gmail.com>, 
	pgsql-hackers@postgresql.org, Thomas Munro <thomas.munro@gmail.com>, 
	Noah Misch <noah@leadboat.com>, Robert Haas <robertmhaas@gmail.com>, 
	Michael Paquier <michael.paquier@gmail.com>
Subject: Re: Buffer locking is special (hints, checksums, AIO writes)
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Hi,

On 2026-01-14 09:17:22 -0500, Melanie Plageman wrote:
> On Tue, Jan 13, 2026 at 7:49 PM Andres Freund <andres@anarazel.de> wrote:
> > I also wonder if we could merge BufferIO into the private refcount
> > infrastructure, similar to how the patches store the lockmode in the private
> > refcount.  The separate resowner acquisition does show up in profiles when
> > reading from the kernel page cache, so that'd be a nice (but small)
> > improvement.
> 
> When you say "BufferIO", do you mean io_wref in the BufferDesc?

I was trying to refer to ResourceOwnerRememberBufferIO(),
ResourceOwnerForgetBufferIO(), ResOwnerReleaseBufferIO(), etc. That's
basically used to unset BM_IO_IN_PROGRESS when an error occurs while trying to
perform IO.

Greetings,

Andres Freund