Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757919Ab3HAV6S (ORCPT ); Thu, 1 Aug 2013 17:58:18 -0400 Received: from mail-qc0-f170.google.com ([209.85.216.170]:38352 "EHLO mail-qc0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757655Ab3HAVuO (ORCPT ); Thu, 1 Aug 2013 17:50:14 -0400 From: Tejun Heo To: lizefan@huawei.com Cc: containers@lists.linux-foundation.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Tejun Heo , "Aneesh Kumar K.V" , KAMEZAWA Hiroyuki , Michal Hocko , Johannes Weiner Subject: [PATCH 04/23] hugetlb_cgroup: pass around @hugetlb_cgroup instead of @cgroup Date: Thu, 1 Aug 2013 17:49:42 -0400 Message-Id: <1375393801-4817-5-git-send-email-tj@kernel.org> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1375393801-4817-1-git-send-email-tj@kernel.org> References: <1375393801-4817-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3308 Lines: 95 cgroup controller API will be converted to primarily use struct cgroup_subsys_state instead of struct cgroup. In preparation, make hugetlb_cgroup functions pass around struct hugetlb_cgroup instead of struct cgroup. This patch shouldn't cause any behavior differences. Signed-off-by: Tejun Heo Cc: Aneesh Kumar K.V Cc: KAMEZAWA Hiroyuki Cc: Michal Hocko Cc: Johannes Weiner --- mm/hugetlb_cgroup.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c index 50f213f..d2f9fc0 100644 --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -56,17 +56,19 @@ static inline bool hugetlb_cgroup_is_root(struct hugetlb_cgroup *h_cg) return (h_cg == root_h_cgroup); } -static inline struct hugetlb_cgroup *parent_hugetlb_cgroup(struct cgroup *cg) +static inline struct hugetlb_cgroup * +parent_hugetlb_cgroup(struct hugetlb_cgroup *h_cg) { - if (!cg->parent) + struct cgroup *parent = h_cg->css.cgroup->parent; + + if (!parent) return NULL; - return hugetlb_cgroup_from_cgroup(cg->parent); + return hugetlb_cgroup_from_cgroup(parent); } -static inline bool hugetlb_cgroup_have_usage(struct cgroup *cg) +static inline bool hugetlb_cgroup_have_usage(struct hugetlb_cgroup *h_cg) { int idx; - struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cg); for (idx = 0; idx < hugetlb_max_hstate; idx++) { if ((res_counter_read_u64(&h_cg->hugepage[idx], RES_USAGE)) > 0) @@ -115,15 +117,14 @@ static void hugetlb_cgroup_css_free(struct cgroup *cgroup) * page reference and test for page active here. This function * cannot fail. */ -static void hugetlb_cgroup_move_parent(int idx, struct cgroup *cgroup, +static void hugetlb_cgroup_move_parent(int idx, struct hugetlb_cgroup *h_cg, struct page *page) { int csize; struct res_counter *counter; struct res_counter *fail_res; struct hugetlb_cgroup *page_hcg; - struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup); - struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(cgroup); + struct hugetlb_cgroup *parent = parent_hugetlb_cgroup(h_cg); page_hcg = hugetlb_cgroup_from_page(page); /* @@ -155,6 +156,7 @@ out: */ static void hugetlb_cgroup_css_offline(struct cgroup *cgroup) { + struct hugetlb_cgroup *h_cg = hugetlb_cgroup_from_cgroup(cgroup); struct hstate *h; struct page *page; int idx = 0; @@ -163,13 +165,13 @@ static void hugetlb_cgroup_css_offline(struct cgroup *cgroup) for_each_hstate(h) { spin_lock(&hugetlb_lock); list_for_each_entry(page, &h->hugepage_activelist, lru) - hugetlb_cgroup_move_parent(idx, cgroup, page); + hugetlb_cgroup_move_parent(idx, h_cg, page); spin_unlock(&hugetlb_lock); idx++; } cond_resched(); - } while (hugetlb_cgroup_have_usage(cgroup)); + } while (hugetlb_cgroup_have_usage(h_cg)); } int hugetlb_cgroup_charge_cgroup(int idx, unsigned long nr_pages, -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/