Re: Fix uninitialized xl_running_xacts padding

Alexander Kuzmenkov <akuzmenkov@tigerdata.com>

From: Alexander Kuzmenkov <akuzmenkov@tigerdata.com>

To: Heikki Linnakangas <hlinnaka@iki.fi>

Cc: Andres Freund <andres@anarazel.de>, Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>, Bertrand Drouvot <bertranddrouvot.pg@gmail.com>, Michael Paquier <michael@paquier.xyz>, Thomas Munro <thomas.munro@gmail.com>, PostgreSQL Hackers <pgsql-hackers@postgresql.org>

Date: 2026-03-16T16:14:10Z

Lists: pgsql-hackers

Attachments

initialize-wal-structs-with-padding-only.patch (text/x-patch) patch
hash-vacuum-one-page-test.patch (text/x-patch) patch

I have removed the unnecessary memsets (for structs with no padding). With
these changes, and removing the two WAL-related suppressions, the make
installcheck under Valgrind passes. The second patch is a small addition to
the hash index test that exercises the "vacuum one page" path we discussed
above.

Commits

Add test for single-page VACUUM of hash index on INSERT
- 1f7947a48d0c 19 (unreleased) landed