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From: Christoph Berg <myon@debian.org>
To: Tomas Vondra <tomas.vondra@postgresql.org>
Cc: pgsql-hackers@lists.postgresql.org
Subject: Re: pgsql: Introduce pg_shmem_allocations_numa view
Date: Thu, 12 Jun 2025 23:16:19 +0200
Message-ID: <aEtDozLmtZddARdB@msg.df7cb.de> (raw)
In-Reply-To: <E1u1tr8-003BbN-2E@gemulon.postgresql.org>
References: <E1u1tr8-003BbN-2E@gemulon.postgresql.org>

Re: Tomas Vondra
> Introduce pg_shmem_allocations_numa view

This is acting up on Debian's 32-bit architectures, namely i386, armel
and armhf:


inline patch 1: /build/reproducible-path/postgresql-18-18~beta1+20250612/build/src/test/regress/results/numa.out (+1/-5 lines) download inline-1.patch--- /build/reproducible-path/postgresql-18-18~beta1+20250612/src/test/regress/expected/numa.out	2025-06-12 12:21:21.000000000 +0000
+++ /build/reproducible-path/postgresql-18-18~beta1+20250612/build/src/test/regress/results/numa.out	2025-06-12 20:20:33.124292694 +0000
@@ -6,8 +6,4 @@
 -- switch to superuser
 \c -
 SELECT COUNT(*) >= 0 AS ok FROM pg_shmem_allocations_numa;
- ok
-----
- t
-(1 row)
-
+ERROR:  invalid NUMA node id outside of allowed range [0, 0]: -14


The diff is the same on all architectures.

-14 seems to be -EFAULT, and move_pages(2) says:

   Page states in the status array
       The following values can be returned in each element of the status array.

       -EFAULT
              This is a zero page or the memory area is not mapped by the process.

https://buildd.debian.org/status/logs.php?pkg=postgresql-18&ver=18%7Ebeta1%2B20250612-1
https://buildd.debian.org/status/fetch.php?pkg=postgresql-18&arch=armel&ver=18%7Ebeta1%2B202...

Christoph





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