Horton

Re: race condition when writing pg_control

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Nathan Bossart <nathandbossart@gmail.com>, Melanie Plageman <melanieplageman@gmail.com>, Michael Paquier <michael@paquier.xyz>, Fujii Masao <masao.fujii@oss.nttdata.com>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Date: 2024-05-17T04:46:53Z
Lists: pgsql-hackers 
The specific problem here is that LocalProcessControlFile() runs in
every launched child for EXEC_BACKEND builds.  Windows uses
EXEC_BACKEND, and Windows' NTFS file system is one of the two file
systems known to this list to have the concurrent read/write data
mashing problem (the other being ext4).

Commits

  1. Fix locking bugs that could corrupt pg_control.