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help / color / mirror / Atom feedFrom: Heikki Linnakangas <heikki.linnakangas@iki.fi>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Add a test module to test after-startup shmem allocations
Date: Sun, 05 Apr 2026 23:27:43 +0000
Message-ID: <E1w9WsZ-00399u-0A@gemulon.postgresql.org> (raw)
Add a test module to test after-startup shmem allocations
The old ShmemInit{Struct/Hash}() functions could be used after
postmaster statup, as long as the allocation is small enough to fit in
spare shmem reserved at startup. I believe some extensions do that,
although we hadn't really documented it and had not coverage for it.
The new test module covers that after-startup usage with the new
ShmemRequestStruct() functions.
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Reviewed-by: Matthias van de Meent <boekewurm+postgres@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://www.postgresql.org/message-id/CAExHW5vM1bneLYfg0wGeAa=52UiJ3z4vKd3AJ72X8Fw6k3KKrg@mail.gmail...
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/6409994c7dd8cc8c06c00882880e04cc895c28bd
Modified Files
--------------
src/test/modules/Makefile | 1 +
src/test/modules/meson.build | 1 +
src/test/modules/test_shmem/Makefile | 24 +++++
src/test/modules/test_shmem/meson.build | 33 +++++++
.../modules/test_shmem/t/001_late_shmem_alloc.pl | 49 ++++++++++
src/test/modules/test_shmem/test_shmem--1.0.sql | 9 ++
src/test/modules/test_shmem/test_shmem.c | 101 +++++++++++++++++++++
src/test/modules/test_shmem/test_shmem.control | 3 +
src/tools/pgindent/typedefs.list | 1 +
9 files changed, 222 insertions(+)
Message-ID: <E1w9WsZ-00399u-0A@gemulon.postgresql.org>
Permalink: ../E1w9WsZ-00399u-0A@gemulon.postgresql.org/
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To: pgsql-committers@postgresql.org
Cc: heikki.linnakangas@iki.fi, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Add a test module to test after-startup shmem allocations
In-Reply-To: <E1w9WsZ-00399u-0A@gemulon.postgresql.org>
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