From: Heikki Linnakangas <heikki.linnakangas@iki.fi>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Fix registering shmem callbacks in single-user mode
Date: Wed, 26 Aug 2026 10:01:07 +0000
Message-ID: <E1wzARO-00000002BGR-1ZlK@gemulon.postgresql.org> (raw)
Fix registering shmem callbacks in single-user mode
RegisterShmemCallbacks() should not be called from the postmaster
process after postmaster startup. Add an assertion for that, and fix
the check for whether it's being called for "after startup"
allocations to take single-user mode into account.
Author: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAJTYsWU7epjUL1-xrpYeOrmkmq20M2Q22Y_SRb8PWQG8KNQyDw@mail.gmail...
Backpatch-through: 19
Branch
------
REL_19_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/b259ece92a951e799d8ace7a865d6269cc1cdd71
Modified Files
--------------
src/backend/storage/ipc/shmem.c | 10 ++++++++--
.../modules/test_shmem/t/001_late_shmem_alloc.pl | 22 ++++++++++++++++++++++
2 files changed, 30 insertions(+), 2 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: heikki.linnakangas@iki.fi, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Fix registering shmem callbacks in single-user mode
In-Reply-To: <E1wzARO-00000002BGR-1ZlK@gemulon.postgresql.org>
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