Re: Old BufferDesc refcount in PrintBufferDescs and PrintPinnedBufs

From: Jacob Brazeal <jacob(dot)brazeal(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, Andres Freund <andres(at)anarazel(dot)de>
Subject: Re: Old BufferDesc refcount in PrintBufferDescs and PrintPinnedBufs
Date: 2025-01-18 07:14:02
Message-ID: CA+COZaAf6QPB+zaEeY9V3uHmHVu9+qYN_V8XVo5_+2EsWZQf+g@mail.gmail.com
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On Fri, Jan 17, 2025 at 9:53 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Jacob Brazeal <jacob(dot)brazeal(at)gmail(dot)com> writes:
> > In bufmgr.c we have the debugging functions PrintBufferDescs
> > and PrintPinnedBufs, which are typically hidden behind the flag
> > #ifdef NOT_USED. These functions reference the old buf->refcount and
> > buf->flags fields, and so they no longer compile. I attached a patch to
> > use BUF_STATE_GET_REFCOUNT instead and removed the reference to
> buf->flags.
>
> Hmm. So those functions have not compiled since 48354581a of
> 2016-04-10, and nobody's noticed. Moreover, whatever use-case
> they do have would be reduced a good deal by taking a buffer
> lock (which might not be available, or our own process might
> hold it already).
>
> I'd vote for just removing them...
>
> regards, tom lane
>

Sounds good! v3 attached.

Attachment Content-Type Size
v3-buf-helper-compile-err.patch application/octet-stream 2.3 KB

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