From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id C2BE07D048 for ; Fri, 18 May 2018 04:37:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751304AbeEREhs (ORCPT ); Fri, 18 May 2018 00:37:48 -0400 Received: from ext-host0001.ascade.co.jp ([218.224.228.194]:61283 "EHLO ns.ascade.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750959AbeEREhq (ORCPT ); Fri, 18 May 2018 00:37:46 -0400 Received: from server0001.ascade.co.jp (server0001.ascade.co.jp [10.1.1.63]) by ns.ascade.co.jp (Postfix) with ESMTP id 58340993BD; Fri, 18 May 2018 13:37:45 +0900 (JST) Received: from [IPv6:::1] (server0001.ascade.co.jp [10.1.1.63]) by server0001.ascade.co.jp (Postfix) with ESMTP id 1080010050E; Fri, 18 May 2018 13:37:43 +0900 (JST) Subject: [PATCH v2 5/7] hugetlb: add charge_surplus_hugepages attribute To: Johannes Weiner , Michal Hocko , Vladimir Davydov , Jonathan Corbet , "Luis R. Rodriguez" , Kees Cook Cc: Andrew Morton , Roman Gushchin , David Rientjes , Mike Kravetz , "Aneesh Kumar K.V" , Naoya Horiguchi , Anshuman Khandual , Marc-Andre Lureau , Punit Agrawal , Dan Williams , Vlastimil Babka , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, tsukada@ascade.co.jp References: From: TSUKADA Koutaro Message-ID: <2e8b5907-36e1-094b-ec87-149e1f0b7f69@ascade.co.jp> Date: Fri, 18 May 2018 13:37:37 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Add an entry for charge_surplus_hugepages to sysfs. Signed-off-by: TSUKADA Koutaro --- hugetlb.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 9a9549c..2f9bdbc 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2662,6 +2662,30 @@ static ssize_t surplus_hugepages_show(struct kobject *kobj, } HSTATE_ATTR_RO(surplus_hugepages); +static ssize_t charge_surplus_hugepages_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct hstate *h = kobj_to_hstate(kobj, NULL); + return sprintf(buf, "%d\n", h->charge_surplus_huge_pages); +} + +static ssize_t charge_surplus_hugepages_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t len) +{ + int err; + unsigned long input; + struct hstate *h = kobj_to_hstate(kobj, NULL); + + err = kstrtoul(buf, 10, &input); + if (err) + return err; + + h->charge_surplus_huge_pages = input ? true : false; + + return len; +} +HSTATE_ATTR(charge_surplus_hugepages); + static struct attribute *hstate_attrs[] = { &nr_hugepages_attr.attr, &nr_overcommit_hugepages_attr.attr, @@ -2671,6 +2695,7 @@ static ssize_t surplus_hugepages_show(struct kobject *kobj, #ifdef CONFIG_NUMA &nr_hugepages_mempolicy_attr.attr, #endif + &charge_surplus_hugepages_attr.attr, NULL, }; -- Tsukada -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html