| From | "Kirill A. Shutemov" <> | Subject | [PATCH 02/23] memcg, thp: charge huge cache pages | Date | Sun, 4 Aug 2013 05:17:04 +0300 |
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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
mem_cgroup_cache_charge() has check for PageCompound(). The check prevents charging huge cache pages.
I don't see a reason why the check is present. Looks like it's just legacy (introduced in 52d4b9a memcg: allocate all page_cgroup at boot).
Let's just drop it.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> --- mm/memcontrol.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index b6cd870..dc50c1a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3921,8 +3921,6 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, if (mem_cgroup_disabled()) return 0; - if (PageCompound(page)) - return 0; if (!PageSwapCache(page)) ret = mem_cgroup_charge_common(page, mm, gfp_mask, type); -- 1.8.3.2
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