diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c867612d9c04..975e89935d52 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -83,7 +83,9 @@ struct page_cgroup { struct mem_cgroup *mem_cgroup; atomic_t ref_cnt; /* Helpful when pages move b/w */ /* mapped and cached states */ + int flags; }; +#define PAGE_CGROUP_FLAG_CACHE (0x1) /* charged as cache */ enum { MEM_CGROUP_TYPE_UNSPEC = 0, @@ -93,6 +95,11 @@ enum { MEM_CGROUP_TYPE_MAX, }; +enum charge_type { + MEM_CGROUP_CHARGE_TYPE_CACHE = 0, + MEM_CGROUP_CHARGE_TYPE_MAPPED, +}; + static struct mem_cgroup init_mem_cgroup; static inline @@ -306,8 +313,8 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, * 0 if the charge was successful * < 0 if the cgroup is over its limit */ -int mem_cgroup_charge(struct page *page, struct mm_struct *mm, - gfp_t gfp_mask) +static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask, enum charge_type ctype) { struct mem_cgroup *mem; struct page_cgroup *pc; @@ -409,6 +416,9 @@ noreclaim: atomic_set(&pc->ref_cnt, 1); pc->mem_cgroup = mem; pc->page = page; + pc->flags = 0; + if (ctype == MEM_CGROUP_CHARGE_TYPE_CACHE) + pc->flags |= PAGE_CGROUP_FLAG_CACHE; if (page_cgroup_assign_new_page_cgroup(page, pc)) { /* * an another charge is added to this page already. @@ -433,6 +443,13 @@ err: return -ENOMEM; } +int mem_cgroup_charge(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask) +{ + return mem_cgroup_charge_common(page, mm, gfp_mask, + MEM_CGROUP_CHARGE_TYPE_MAPPED); +} + /* * See if the cached pages should be charged at all? */ @@ -445,7 +462,8 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, mem = rcu_dereference(mm->mem_cgroup); if (mem->control_type == MEM_CGROUP_TYPE_ALL) - return mem_cgroup_charge(page, mm, gfp_mask); + return mem_cgroup_charge_common(page, mm, gfp_mask, + MEM_CGROUP_CHARGE_TYPE_CACHE); else return 0; } |