Thread

[PATCH] numa: Catch "Operation not permitted" error

Christoph Berg <myon@debian.org> — 2025-10-16T11:24:56Z

On older (before 2.0.19) libnuma versions, the error thrown when the
NUMA status cannot be inquired is different.
---
 .../expected/pg_buffercache_numa_2.out        | 21 +++++++++++++++++++
 src/test/regress/expected/numa_2.out          |  9 ++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 contrib/pg_buffercache/expected/pg_buffercache_numa_2.out
 create mode 100644 src/test/regress/expected/numa_2.out

diff --git a/contrib/pg_buffercache/expected/pg_buffercache_numa_2.out b/contrib/pg_buffercache/expected/pg_buffercache_numa_2.out
new file mode 100644
index 00000000000..b970dd2eaf9
--- /dev/null
+++ b/contrib/pg_buffercache/expected/pg_buffercache_numa_2.out
@@ -0,0 +1,21 @@
+SELECT NOT(pg_numa_available()) AS skip_test \gset
+\if :skip_test
+\quit
+\endif
+-- We expect at least one entry for each buffer
+select count(*) >= (select setting::bigint
+                    from pg_settings
+                    where name = 'shared_buffers')
+from pg_buffercache_numa;
+ERROR:  failed NUMA pages inquiry: Operation not permitted
+-- Check that the functions / views can't be accessed by default. To avoid
+-- having to create a dedicated user, use the pg_database_owner pseudo-role.
+SET ROLE pg_database_owner;
+SELECT count(*) > 0 FROM pg_buffercache_numa;
+ERROR:  permission denied for view pg_buffercache_numa
+RESET role;
+-- Check that pg_monitor is allowed to query view / function
+SET ROLE pg_monitor;
+SELECT count(*) > 0 FROM pg_buffercache_numa;
+ERROR:  failed NUMA pages inquiry: Operation not permitted
+RESET role;
diff --git a/src/test/regress/expected/numa_2.out b/src/test/regress/expected/numa_2.out
new file mode 100644
index 00000000000..b4c19f01f59
--- /dev/null
+++ b/src/test/regress/expected/numa_2.out
@@ -0,0 +1,9 @@
+SELECT NOT(pg_numa_available()) AS skip_test \gset
+\if :skip_test
+SELECT COUNT(*) = 0 AS ok FROM pg_shmem_allocations_numa;
+\quit
+\endif
+-- switch to superuser
+\c -
+SELECT COUNT(*) >= 0 AS ok FROM pg_shmem_allocations_numa;
+ERROR:  failed NUMA pages inquiry status: Operation not permitted
-- 
2.51.0


--dtTMMoFAaZ2xgutH--