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authorMichal Hocko <mhocko@suse.cz>2013-02-22 16:34:45 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-23 17:50:17 -0800
commit6acc8b02517d7063b25490b26215834bd2f363c8 (patch)
tree41838cd43aaae8b75cee1ccb073a4d8620104018 /mm
parent2d11085e404f7b45ac4de60db2c9685e349c172d (diff)
memcg: clean up swap accounting initialization code
Memcg swap accounting is currently enabled by enable_swap_cgroup when the root cgroup is created. mem_cgroup_init acts as a memcg subsystem initializer which sounds like a much better place for enable_swap_cgroup as well. We already register memsw files from there so it makes a lot of sense to merge those two into a single enable_swap_cgroup function. This patch doesn't introduce any semantic changes. Signed-off-by: Michal Hocko <mhocko@suse.cz> Cc: Zhouping Liu <zliu@redhat.com> Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: David Rientjes <rientjes@google.com> Cc: Li Zefan <lizefan@huawei.com> Cc: CAI Qian <caiqian@redhat.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c30
1 files changed, 12 insertions, 18 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 00ce03e8a277..972f822b142b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6046,18 +6046,6 @@ struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
}
EXPORT_SYMBOL(parent_mem_cgroup);
-#ifdef CONFIG_MEMCG_SWAP
-static void __init enable_swap_cgroup(void)
-{
- if (!mem_cgroup_disabled() && really_do_swap_account)
- do_swap_account = 1;
-}
-#else
-static void __init enable_swap_cgroup(void)
-{
-}
-#endif
-
static int mem_cgroup_soft_limit_tree_init(void)
{
struct mem_cgroup_tree_per_node *rtpn;
@@ -6111,7 +6099,6 @@ mem_cgroup_css_alloc(struct cgroup *cont)
/* root ? */
if (cont->parent == NULL) {
int cpu;
- enable_swap_cgroup();
parent = NULL;
if (mem_cgroup_soft_limit_tree_init())
goto free_out;
@@ -6800,12 +6787,19 @@ __setup("swapaccount=", enable_swap_account);
static void __init memsw_file_init(void)
{
- if (really_do_swap_account)
- WARN_ON(cgroup_add_cftypes(&mem_cgroup_subsys,
- memsw_cgroup_files));
+ WARN_ON(cgroup_add_cftypes(&mem_cgroup_subsys, memsw_cgroup_files));
+}
+
+static void __init enable_swap_cgroup(void)
+{
+ if (!mem_cgroup_disabled() && really_do_swap_account) {
+ do_swap_account = 1;
+ memsw_file_init();
+ }
}
+
#else
-static void __init memsw_file_init(void)
+static void __init enable_swap_cgroup(void)
{
}
#endif
@@ -6819,7 +6813,7 @@ static void __init memsw_file_init(void)
static int __init mem_cgroup_init(void)
{
hotcpu_notifier(memcg_cpu_hotplug_callback, 0);
- memsw_file_init();
+ enable_swap_cgroup();
return 0;
}
subsys_initcall(mem_cgroup_init);