linux-kernel - [PATCH RESEND 2/3] docs: cgroup: Note about sibling relative reclaim protection

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Message-ID: <20251110193638.623208-3-mkoutny@suse.com>
Date: Mon, 10 Nov 2025 20:36:34 +0100
From: Michal Koutný <mkoutny@...e.com>
To: cgroups@...r.kernel.org,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Natalie Vock <natalie.vock@....de>,
	Maarten Lankhorst <dev@...khorst.se>,
	Michal Koutný <mkoutny@...e.com>,
	Tejun Heo <tj@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Jonathan Corbet <corbet@....net>
Subject: [PATCH RESEND 2/3] docs: cgroup: Note about sibling relative reclaim protection

Signed-off-by: Michal Koutný <mkoutny@...e.com>
---
 Documentation/admin-guide/cgroup-v2.rst | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index a6def773a3072..be3d805a929ef 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1952,6 +1952,10 @@ targets ancestors of A, the effective protection of B is capped by the
 protection value configured for A (and any other intermediate ancestors between
 A and the target).
 
+To express indifference about relative sibling protection, it is suggested to
+use memory_recursiveprot. Configuring all descendants of a parent with finite
+protection to "max" works but it may unnecessarily skew memory.events:low
+field.
 
 Memory Ownership
 ~~~~~~~~~~~~~~~~
-- 
2.51.1