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help / color / mirror / Atom feedFrom: Andrew Dunstan <[email protected]>
To: Tom Lane <[email protected]>
Cc: Thomas Munro <[email protected]>
Cc: Jakub Wartak <[email protected]>
Cc: Bruce Momjian <[email protected]>
Cc: Dimitrios Apostolou <[email protected]>
Cc: Magnus Hagander <[email protected]>
Cc: Tomas Vondra <[email protected]>
Cc: [email protected]
Cc: Andres Freund <[email protected]>
Cc: Melanie Plageman <[email protected]>
Cc: Heikki Linnakangas <[email protected]>
Cc: Kyotaro Horiguchi <[email protected]>
Cc: David Rowley <[email protected]>
Subject: Re: [PING] fallocate() causes btrfs to never compress postgresql files
Date: Fri, 6 Feb 2026 15:16:25 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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On 2026-02-06 Fr 1:31 PM, Tom Lane wrote:
> Andrew Dunstan <[email protected]> writes:
>> On 2026-02-06 Fr 10:11 AM, Tom Lane wrote:
>>> The message is complaining that sizeof(ConfigureNamesEnum) changed,
>>> which it did, but I don't see how that value would be visible to
>>> external modules. So maybe a bug in libabigail?
>> I guess because of this in guc_tables.h:
>> extern PGDLLIMPORT struct config_generic ConfigureNames[];
> Evidently, but I don't see how that provides a sizeof() value to
> onlookers. Just to be sure, I tried to compile a use of that,
> and got
>
> test.c:43:53: error: invalid application of ‘sizeof’ to incomplete type ‘struct config_generic[]’
> elog(NOTICE, "sizeof(ConfigureNames) = %zu", sizeof(ConfigureNames));
> ^
>
> So if this isn't an outright bug, it's at least unhelpful behavior.
>
Fair enough. I agree it's not terribly helpful. In any case, maybe we
need to look at my earlier suggestion of adding a suppression file.
cheers
andrew
--
Andrew Dunstan
EDB: https://www.enterprisedb.com
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Subject: Re: [PING] fallocate() causes btrfs to never compress postgresql files
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