openwrt/target/linux/bcm27xx/patches-5.4/950-0089-cgroup-Disable-cgroup-memory-by-default.patch
Petr Štetiar 5ecc0cfd6f kernel: bump 5.4 to 5.4.28
Changelog since 5.4.24 mentions CVE-2019-19769, CVE-2020-8648,
CVE-2020-8649 and CVE-2020-8647.

Removed upstreamed:

 generic: 507-v5.6-iio-chemical-sps30-fix-missing-triggered-buffer-depe.patch
 generic: 600-ipv6-addrconf-call-ipv6_mc_up-for-non-Ethernet-inter.patch
 bcm27xx: 950-0435-ASoC-pcm512x-Fix-unbalanced-regulator-enable-call-in.patch
 ipq806x: 701-stmmac-fix-notifier-registration.patch
 lantiq: 002-pinctrl-falcon-fix-syntax-error.patch
 octeontx: 0002-net-thunderx-workaround-BGX-TX-Underflow-issue.patch

Run tested: apu2, qemu-x86-64, apalis, a64-olinuxino, nbg6617
Build tested: sunxi/a53, imx6, x86/64, ipq40xx

Tested-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> [apu2]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
2020-03-28 13:03:02 +01:00

71 lines
1.8 KiB
Diff

From 0f95a2f2688ff44dc7080beaa2076741a0bdf510 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 | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5720,6 +5720,8 @@ int __init cgroup_init_early(void)
}
static u16 cgroup_disable_mask __initdata;
+static u16 cgroup_enable_mask __initdata;
+static int __init cgroup_disable(char *str);
/**
* cgroup_init - cgroup initialization
@@ -5759,6 +5761,12 @@ int __init cgroup_init(void)
mutex_unlock(&cgroup_mutex);
+ /* Apply an implicit disable... */
+ 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 =
@@ -6178,6 +6186,28 @@ 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;
+ }
+ }
+ return 1;
+}
+__setup("cgroup_enable=", cgroup_enable);
+
void __init __weak enable_debug_cgroup(void) { }
static int __init enable_cgroup_debug(char *str)