Commit 1bec6b33 authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds
Browse files

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: default avatarJohannes Weiner <hannes@cmpxchg.org>
Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 59d1d256
......@@ -3887,20 +3887,21 @@ 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);
......@@ -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);
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
......@@ -4047,9 +4037,11 @@ 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)
......
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