From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx167.postini.com [74.125.245.167]) by kanga.kvack.org (Postfix) with SMTP id 32A6F6B005C for ; Tue, 12 Jun 2012 05:40:31 -0400 (EDT) Received: from /spool/local by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 12 Jun 2012 15:10:28 +0530 Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay04.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q5C9eOXI5964182 for ; Tue, 12 Jun 2012 15:10:24 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q5CF9di8022141 for ; Wed, 13 Jun 2012 01:09:40 +1000 From: "Aneesh Kumar K.V" Subject: Re: [PATCH -V8 10/16] hugetlb/cgroup: Add the cgroup pointer to page lru In-Reply-To: <4FD6F530.6050603@jp.fujitsu.com> References: <1339232401-14392-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <1339232401-14392-11-git-send-email-aneesh.kumar@linux.vnet.ibm.com> <4FD6F530.6050603@jp.fujitsu.com> Date: Tue, 12 Jun 2012 15:10:20 +0530 Message-ID: <87mx48ool7.fsf@skywalker.in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain Sender: owner-linux-mm@kvack.org List-ID: To: Kamezawa Hiroyuki Cc: linux-mm@kvack.org, dhillf@gmail.com, rientjes@google.com, mhocko@suse.cz, akpm@linux-foundation.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Kamezawa Hiroyuki writes: > (2012/06/09 17:59), Aneesh Kumar K.V wrote: >> From: "Aneesh Kumar K.V" >> >> Add the hugetlb cgroup pointer to 3rd page lru.next. This limit >> the usage to hugetlb cgroup to only hugepages with 3 or more >> normal pages. I guess that is an acceptable limitation. >> >> Signed-off-by: Aneesh Kumar K.V >> --- >> include/linux/hugetlb_cgroup.h | 31 +++++++++++++++++++++++++++++++ >> mm/hugetlb.c | 4 ++++ >> 2 files changed, 35 insertions(+) >> >> diff --git a/include/linux/hugetlb_cgroup.h b/include/linux/hugetlb_cgroup.h >> index 5794be4..ceff1d5 100644 >> --- a/include/linux/hugetlb_cgroup.h >> +++ b/include/linux/hugetlb_cgroup.h >> @@ -26,6 +26,26 @@ struct hugetlb_cgroup { >> }; >> >> #ifdef CONFIG_CGROUP_HUGETLB_RES_CTLR >> +static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page) >> +{ >> + if (!PageHuge(page)) >> + return NULL; > > I'm not very sure but.... > > VM_BUG_ON(!PageHuge(page)) ?? > > > >> + if (compound_order(page)< 3) >> + return NULL; >> + return (struct hugetlb_cgroup *)page[2].lru.next; >> +} >> + >> +static inline >> +int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg) >> +{ >> + if (!PageHuge(page)) >> + return -1; > > ditto. > >> + if (compound_order(page)< 3) >> + return -1; >> + page[2].lru.next = (void *)h_cg; >> + return 0; >> +} >> + done -aneesh -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org