From 04198f7933af57f9b417dadb27a7df6d306e598d Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 25 Jul 2021 21:35:46 +0200
Subject: [PATCH 099/158] mm/memcontrol: Disable on PREEMPT_RT

559271146efc ("mm/memcg: optimize user context object stock access") is a
classic example of optimizing for the cpu local BKL serialization without a
clear protection scope.

Disable MEMCG on RT for now.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 init/Kconfig |    1 +
 1 file changed, 1 insertion(+)

Index: linux-5.15/init/Kconfig
===================================================================
--- linux-5.15.orig/init/Kconfig
+++ linux-5.15/init/Kconfig
@@ -938,6 +938,7 @@ config PAGE_COUNTER
 
 config MEMCG
 	bool "Memory controller"
+	depends on !PREEMPT_RT
 	select PAGE_COUNTER
 	select EVENTFD
 	help