From 10d5ebf40ff09db03b97cb177f24b9c7c8b4bb52 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Mon, 8 Jul 2013 16:00:33 -0700 Subject: [PATCH] memcg: use css_get/put when charging/uncharging kmem Use css_get/put instead of mem_cgroup_get/put. We can't do a simple replacement, because here mem_cgroup_put() is called during mem_cgroup_css_free(), while mem_cgroup_css_free() won't be called until css refcnt goes down to 0. Instead we increment css refcnt in mem_cgroup_css_offline(), and then check if there's still kmem charges. If not, css refcnt will be decremented immediately, otherwise the refcnt will be released after the last kmem allocation is uncahred. [akpm@linux-foundation.org: tweak comment] Signed-off-by: Li Zefan Acked-by: Michal Hocko Acked-by: KAMEZAWA Hiroyuki Reviewed-by: Tejun Heo Cc: Michal Hocko Cc: Glauber Costa Cc: Johannes Weiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Reading git-format-patch failed