512d3e8919
b46e1e54d0 pinned the VM after acquiring a cleanup lock on the heap
page when on-access pruning. This was not correct, as pinning the VM may
require I/O. Pin the VM before acquiring the lock. This could mean
occasional unneeded pinning when the buffer is under contention, but
that should be rare.
Reported-by: Melanie Plageman <melanieplageman@gmail.com>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://postgr.es/m/CAAKRu_aR6e2mNVo-DNHDUfBE5i0cbE4%3Du%3D_Qi9%2Bv573qiGtBig%40mail.gmail.com
Backpatch-through: 19PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.