diff options
| author | Phil Elwell <phil@raspberrypi.org> | 2017-09-18 12:01:46 +0100 |
|---|---|---|
| committer | popcornmix <popcornmix@gmail.com> | 2017-09-19 12:01:03 +0100 |
| commit | ba742b52e5099b3ed964e78f227dc96460b5cdc0 (patch) | |
| tree | 1f1dddfc87cac9ccbb202bb56dd5576d67a6436d | |
| parent | 95b592469ab55bf730ac0c6433077f53a11b5551 (diff) | |
cgroup: Add kernel param to enable memory grouplinaro-20170919-001linaro-17.09-rpi3
cgroup support is useful, but enabling the "memory" cgroup has a 32-byte
overhead per page. Arrange that "memory" cgroup is disabled by default
unless the "cgroup_memory" parameter is set to a true value.
See: https://github.com/raspberrypi/issues/1950
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
| -rw-r--r-- | kernel/cgroup.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 2c785f957024..c3f5abf0fd7a 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -5638,6 +5638,8 @@ int __init cgroup_init_early(void) } static u16 cgroup_disable_mask __initdata; +static bool cgroup_enable_memory; +static int __init cgroup_disable(char *str); /** * cgroup_init - cgroup initialization @@ -5676,6 +5678,9 @@ int __init cgroup_init(void) mutex_unlock(&cgroup_mutex); + if (!cgroup_enable_memory) + cgroup_disable("memory"); + for_each_subsys(ss, ssid) { if (ss->early_init) { struct cgroup_subsys_state *css = @@ -6151,6 +6156,13 @@ static int __init cgroup_disable(char *str) } __setup("cgroup_disable=", cgroup_disable); +static int __init cgroup_memory(char *str) +{ + kstrtobool(str, &cgroup_enable_memory); + return 1; +} +__setup("cgroup_memory=", cgroup_memory); + static int __init cgroup_no_v1(char *str) { struct cgroup_subsys *ss; |