mem_cgroup_charge_common() is used by both cache and anon pages, but
most of its body only applies to anon pages and the remainder is not
worth having in a separate function.
Signed-off-by: Johannes Weiner <han...@cmpxchg.org>
---
mm/memcontrol.c | 40 ++++++++++++++++------------------------
1 file changed, 16 insertions(+), 24 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5abdfab957ad..cfdb9c385d8d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3919,20 +3919,21 @@ out:
return ret;
}
-/*
- * Charge the memory controller for page usage.
- * Return
- * 0 if the charge was successful
- * < 0 if the cgroup is over its limit
- */
-static int mem_cgroup_charge_common(struct page *page, struct mm_struct *mm,
- gfp_t gfp_mask, enum charge_type ctype)
+int mem_cgroup_newpage_charge(struct page *page,
+ struct mm_struct *mm, gfp_t gfp_mask)
{
struct mem_cgroup *memcg = NULL;
unsigned int nr_pages = 1;
bool oom = true;
int ret;
+ if (mem_cgroup_disabled())
+ return 0;
+
+ VM_BUG_ON_PAGE(page_mapped(page), page);
+ VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
+ VM_BUG_ON(!mm);
+
if (PageTransHuge(page)) {
nr_pages <<= compound_order(page);
VM_BUG_ON_PAGE(!PageTransHuge(page), page);
@@ -3946,22 +3947,11 @@ static int mem_cgroup_charge_common(struct page *page,
struct mm_struct *mm,
ret = __mem_cgroup_try_charge(mm, gfp_mask, nr_pages, &memcg, oom);
if (ret == -ENOMEM)
return ret;
- __mem_cgroup_commit_charge(memcg, page, nr_pages, ctype, false);
+ __mem_cgroup_commit_charge(memcg, page, nr_pages,
+ MEM_CGROUP_CHARGE_TYPE_ANON, false);
return 0;
}
-int mem_cgroup_newpage_charge(struct page *page,
- struct mm_struct *mm, gfp_t gfp_mask)
-{
- if (mem_cgroup_disabled())
- return 0;
- VM_BUG_ON_PAGE(page_mapped(page), page);
- VM_BUG_ON_PAGE(page->mapping && !PageAnon(page), page);
- VM_BUG_ON(!mm);
- return mem_cgroup_charge_common(page, mm, gfp_mask,
- MEM_CGROUP_CHARGE_TYPE_ANON);
-}
-
/*
* While swap-in, try_charge -> commit or cancel, the page is locked.
* And when try_charge() successfully returns, one refcnt to memcg without
@@ -4079,9 +4069,11 @@ int mem_cgroup_cache_charge(struct page *page, struct
mm_struct *mm,
if (PageCompound(page))
return 0;
- if (!PageSwapCache(page))
- ret = mem_cgroup_charge_common(page, mm, gfp_mask, type);
- else { /* page is swapcache/shmem */
+ if (!PageSwapCache(page)) {
+ ret = __mem_cgroup_try_charge(mm, gfp_mask, 1, &memcg, true);
+ if (ret != -ENOMEM)
+ __mem_cgroup_commit_charge(memcg, page, 1, type, false);
+ } else { /* page is swapcache/shmem */
ret = __mem_cgroup_try_charge_swapin(mm, page,
gfp_mask, &memcg);
if (!ret)
--
1.9.0
--
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