memory controller: make memory resource control aware of boot options

[net-next-2.6.git] / mm / memcontrol.c

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 9b648bd63451dd81026649f244a6f8ae0d4b0699..23b5fa4cabd8d7310b4adc3043f3c5232c47fa22 100644 (file)
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -533,6 +533,9 @@ static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
        unsigned long nr_retries = MEM_CGROUP_RECLAIM_RETRIES;
        struct mem_cgroup_per_zone *mz;
 
+       if (mem_cgroup_subsys.disabled)
+               return 0;
+
        /*
         * Should page_cgroup's go to their own slab?
         * One could optimize the performance of the charging routine
@@ -665,6 +668,9 @@ void mem_cgroup_uncharge_page(struct page *page)
        struct mem_cgroup_per_zone *mz;
        unsigned long flags;
 
+       if (mem_cgroup_subsys.disabled)
+               return;
+
        /*
         * Check if our page_cgroup is valid
         */
@@ -705,6 +711,9 @@ int mem_cgroup_prepare_migration(struct page *page)
 {
        struct page_cgroup *pc;
 
+       if (mem_cgroup_subsys.disabled)
+               return 0;
+
        lock_page_cgroup(page);
        pc = page_get_page_cgroup(page);
        if (pc)
@@ -803,6 +812,9 @@ static int mem_cgroup_force_empty(struct mem_cgroup *mem)
        int ret = -EBUSY;
        int node, zid;
 
+       if (mem_cgroup_subsys.disabled)
+               return 0;
+
        css_get(&mem->css);
        /*
         * page reclaim code (kswapd etc..) will move pages between
@@ -1053,6 +1065,8 @@ static void mem_cgroup_destroy(struct cgroup_subsys *ss,
 static int mem_cgroup_populate(struct cgroup_subsys *ss,
                                struct cgroup *cont)
 {
+       if (mem_cgroup_subsys.disabled)
+               return 0;
        return cgroup_add_files(cont, ss, mem_cgroup_files,
                                        ARRAY_SIZE(mem_cgroup_files));
 }
@@ -1065,6 +1079,9 @@ static void mem_cgroup_move_task(struct cgroup_subsys *ss,
        struct mm_struct *mm;
        struct mem_cgroup *mem, *old_mem;
 
+       if (mem_cgroup_subsys.disabled)
+               return;
+
        mm = get_task_mm(p);
        if (mm == NULL)
                return;