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mm: memcg: inline mem_cgroup_charge_common() 

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 <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2014-04-07 15:37:41 -07:00 committed by Linus Torvalds
parent 59d1d256e1
commit 1bec6b333e
1 changed files with 16 additions and 24 deletions
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40
mm/memcontrol.c
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@ -3887,20 +3887,21 @@ static int mem_cgroup_move_parent(struct page *page,
return ret; return ret;
} }
/* int mem_cgroup_newpage_charge(struct page *page,
* Charge the memory controller for page usage. struct mm_struct *mm, gfp_t gfp_mask)
* 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)
{ {
struct mem_cgroup *memcg = NULL; struct mem_cgroup *memcg = NULL;
unsigned int nr_pages = 1; unsigned int nr_pages = 1;
bool oom = true; bool oom = true;
int ret; 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)) { if (PageTransHuge(page)) {
nr_pages <<= compound_order(page); nr_pages <<= compound_order(page);
VM_BUG_ON_PAGE(!PageTransHuge(page), page); VM_BUG_ON_PAGE(!PageTransHuge(page), page);
@ -3914,22 +3915,11 @@ 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); ret = __mem_cgroup_try_charge(mm, gfp_mask, nr_pages, &memcg, oom);
if (ret == -ENOMEM) if (ret == -ENOMEM)
return ret; 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; 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. * While swap-in, try_charge -> commit or cancel, the page is locked.
* And when try_charge() successfully returns, one refcnt to memcg without * And when try_charge() successfully returns, one refcnt to memcg without
@ -4047,9 +4037,11 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
if (PageCompound(page)) if (PageCompound(page))
return 0; return 0;
if (!PageSwapCache(page)) if (!PageSwapCache(page)) {
ret = mem_cgroup_charge_common(page, mm, gfp_mask, type); ret = __mem_cgroup_try_charge(mm, gfp_mask, 1, &memcg, true);
else { /* page is swapcache/shmem */ 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, ret = __mem_cgroup_try_charge_swapin(mm, page,
gfp_mask, &memcg); gfp_mask, &memcg);
if (!ret) if (!ret)