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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch39
1 files changed, 27 insertions, 12 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch b/target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch
index 86f60e7052..d4818b2239 100644
--- a/target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch
+++ b/target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch
@@ -1,4 +1,4 @@
-From 0f95a2f2688ff44dc7080beaa2076741a0bdf510 Mon Sep 17 00:00:00 2001
+From 2b13c54592135b6fab269517ed687fa9f80bf8e5 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Mon, 27 Nov 2017 17:14:54 +0000
Subject: [PATCH] cgroup: Disable cgroup "memory" by default
@@ -12,34 +12,46 @@ See: https://github.com/raspberrypi/linux/issues/1950
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
- kernel/cgroup/cgroup.c | 30 ++++++++++++++++++++++++++++++
- 1 file changed, 30 insertions(+)
+ kernel/cgroup/cgroup.c | 38 ++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 38 insertions(+)
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
-@@ -5722,6 +5722,8 @@ int __init cgroup_init_early(void)
+@@ -5721,6 +5721,9 @@ int __init cgroup_init_early(void)
+ return 0;
}
- static u16 cgroup_disable_mask __initdata;
+static u16 cgroup_enable_mask __initdata;
+static int __init cgroup_disable(char *str);
-
++
/**
* cgroup_init - cgroup initialization
-@@ -5761,6 +5763,12 @@ int __init cgroup_init(void)
+ *
+@@ -5759,6 +5762,12 @@ int __init cgroup_init(void)
mutex_unlock(&cgroup_mutex);
-+ /* Apply an implicit disable... */
++ /*
++ * Apply an implicit disable, knowing that an explicit enable will
++ * prevent if from doing anything.
++ */
+ cgroup_disable("memory");
+
-+ /* ...knowing that an explicit enable will override it. */
-+ cgroup_disable_mask &= ~cgroup_enable_mask;
-+
for_each_subsys(ss, ssid) {
if (ss->early_init) {
struct cgroup_subsys_state *css =
-@@ -6180,6 +6188,28 @@ static int __init cgroup_disable(char *s
+@@ -6168,6 +6177,10 @@ static int __init cgroup_disable(char *s
+ strcmp(token, ss->legacy_name))
+ continue;
+
++ /* An explicit cgroup_enable overrides a disable */
++ if (cgroup_enable_mask & (1 << i))
++ continue;
++
+ static_branch_disable(cgroup_subsys_enabled_key[i]);
+ pr_info("Disabling %s control group subsystem\n",
+ ss->name);
+@@ -6177,6 +6190,31 @@ static int __init cgroup_disable(char *s
}
__setup("cgroup_disable=", cgroup_disable);
@@ -59,6 +71,9 @@ Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+ continue;
+
+ cgroup_enable_mask |= 1 << i;
++ static_branch_enable(cgroup_subsys_enabled_key[i]);
++ pr_info("Enabling %s control group subsystem\n",
++ ss->name);
+ }
+ }
+ return 1;