mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
fe209fa47d
All patches automatically rebased Build system: x86_64 Build-tested: bcm2711/RPi4B, mt7622/RT3200 Run-tested: bcm2711/RPi4B, mt7622/RT3200 Signed-off-by: John Audia <therealgraysky@proton.me>
86 lines
2.2 KiB
Diff
86 lines
2.2 KiB
Diff
From e2494e8c48c510ccefc889393f5d776b5e3824ac 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
|
|
|
|
Some Raspberry Pis have limited RAM and most users won't use the
|
|
cgroup memory support so it is disabled by default. Enable with:
|
|
|
|
cgroup_enable=memory
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/1950
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
---
|
|
kernel/cgroup/cgroup.c | 38 ++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 38 insertions(+)
|
|
|
|
--- a/kernel/cgroup/cgroup.c
|
|
+++ b/kernel/cgroup/cgroup.c
|
|
@@ -5875,6 +5875,9 @@ int __init cgroup_init_early(void)
|
|
return 0;
|
|
}
|
|
|
|
+static u16 cgroup_enable_mask __initdata;
|
|
+static int __init cgroup_disable(char *str);
|
|
+
|
|
/**
|
|
* cgroup_init - cgroup initialization
|
|
*
|
|
@@ -5913,6 +5916,12 @@ int __init cgroup_init(void)
|
|
|
|
mutex_unlock(&cgroup_mutex);
|
|
|
|
+ /*
|
|
+ * Apply an implicit disable, knowing that an explicit enable will
|
|
+ * prevent if from doing anything.
|
|
+ */
|
|
+ cgroup_disable("memory");
|
|
+
|
|
for_each_subsys(ss, ssid) {
|
|
if (ss->early_init) {
|
|
struct cgroup_subsys_state *css =
|
|
@@ -6497,6 +6506,10 @@ 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);
|
|
@@ -6515,6 +6528,31 @@ static int __init cgroup_disable(char *s
|
|
}
|
|
__setup("cgroup_disable=", cgroup_disable);
|
|
|
|
+static int __init cgroup_enable(char *str)
|
|
+{
|
|
+ struct cgroup_subsys *ss;
|
|
+ char *token;
|
|
+ int i;
|
|
+
|
|
+ while ((token = strsep(&str, ",")) != NULL) {
|
|
+ if (!*token)
|
|
+ continue;
|
|
+
|
|
+ for_each_subsys(ss, i) {
|
|
+ if (strcmp(token, ss->name) &&
|
|
+ strcmp(token, ss->legacy_name))
|
|
+ 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;
|
|
+}
|
|
+__setup("cgroup_enable=", cgroup_enable);
|
|
+
|
|
void __init __weak enable_debug_cgroup(void) { }
|
|
|
|
static int __init enable_cgroup_debug(char *str)
|