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| author |   Michal Hocko <mhocko@suse.cz> | 2013-02-22 16:34:45 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-23 17:50:17 -0800 |
| commit | 6acc8b02517d7063b25490b26215834bd2f363c8 (patch) | |
| tree | 41838cd43aaae8b75cee1ccb073a4d8620104018 /mm/memcontrol.c | |
| parent | memcg: do not create memsw files if swap accounting is disabled (diff) | |
| download | linux-dev-6acc8b02517d7063b25490b26215834bd2f363c8.tar.xz linux-dev-6acc8b02517d7063b25490b26215834bd2f363c8.zip | |
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 '')
| -rw-r--r-- | mm/memcontrol.c | 30 |
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); |