diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0102-cgroup-Disable-cgroup-memory-by-default.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0102-cgroup-Disable-cgroup-memory-by-default.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0102-cgroup-Disable-cgroup-memory-by-default.patch b/target/linux/brcm2708/patches-4.19/950-0102-cgroup-Disable-cgroup-memory-by-default.patch new file mode 100644 index 0000000000..f08cbebc47 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0102-cgroup-Disable-cgroup-memory-by-default.patch @@ -0,0 +1,70 @@ +From 7ae6ba03434344f90403936ae79bfd7ba005b49c 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 +@@ -5334,6 +5334,8 @@ 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 +@@ -5374,6 +5376,12 @@ 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 = +@@ -5765,6 +5773,28 @@ 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); ++ + /** + * css_tryget_online_from_dir - get corresponding css from a cgroup dentry + * @dentry: directory dentry of interest |