[lxc-devel] [lxc/master] cgroups: ignore legacy limits on pure cgroup2 systems

[brauner on Github]

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From b96aa96fe29df6a24ed9e84961cfc8febd50d781 Mon Sep 17 00:00:00 2001
From: Christian Brauner <christian.brauner at ubuntu.com>
Date: Sun, 12 Apr 2020 10:19:40 +0200
Subject: [PATCH] cgroups: ignore legacy limits on pure cgroup2 systems

Link: https://github.com/lxc/lxc/issues/3183#issuecomment-612462322
Signed-off-by: Christian Brauner <christian.brauner at ubuntu.com>
---
 src/lxc/cgroups/cgfsng.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 4dad9e4263..522eb412d7 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -2847,6 +2847,9 @@ __cgfsng_ops static bool cgfsng_setup_limits_legacy(struct cgroup_ops *ops,
 	if (!ops->hierarchies)
 		return ret_set_errno(false, EINVAL);
 
+	if (!pure_unified_layout(ops))
+		return log_warn_errno(true, EINVAL, "Ignoring legacy cgroup limits on pure cgroup2 system");
+
 	sorted_cgroup_settings = sort_cgroup_settings(cgroup_settings);
 	if (!sorted_cgroup_settings)
 		return false;