From 7cd9e4f8a087caa38acb5c7b0c41d38e82cf4d80 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 14 May 2020 19:11:18 +0200
Subject: [PATCH] limit-util: quieten a very common debug message that is
 misleading

---
 src/basic/limits-util.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/basic/limits-util.c b/src/basic/limits-util.c
index 43f6b6f68a..9da767a570 100644
--- a/src/basic/limits-util.c
+++ b/src/basic/limits-util.c
@@ -41,6 +41,11 @@ uint64_t physical_memory(void) {
         }
         if (r > 0) {
                 r = cg_get_attribute("memory", root, "memory.max", &value);
+                if (r == -ENOENT) /* Field does not exist on the system's top-level cgroup, hence don't
+                                   * complain. (Note that it might exist on our own root though, if we live
+                                   * in a cgroup namespace, hence check anyway instead of not even
+                                   * trying.) */
+                        return mem;
                 if (r < 0) {
                         log_debug_errno(r, "Failed to read memory.max cgroup attribute, ignoring cgroup memory limit: %m");
                         return mem;