From patchwork Wed May 5 00:30:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rick Edgecombe X-Patchwork-Id: 12238711 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2458DC43460 for ; Wed, 5 May 2021 00:32:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9D968613CB for ; Wed, 5 May 2021 00:32:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9D968613CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 034A16B0071; Tue, 4 May 2021 20:32:30 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F00A26B0073; Tue, 4 May 2021 20:32:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D4C436B0072; Tue, 4 May 2021 20:32:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0048.hostedemail.com [216.40.44.48]) by kanga.kvack.org (Postfix) with ESMTP id B48BB6B0071 for ; Tue, 4 May 2021 20:32:29 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 6A020181AEF39 for ; Wed, 5 May 2021 00:32:29 +0000 (UTC) X-FDA: 78105301218.28.93729A4 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by imf03.hostedemail.com (Postfix) with ESMTP id CB65AC0007C6 for ; Wed, 5 May 2021 00:32:21 +0000 (UTC) IronPort-SDR: PwhJ7oUoyaFTBxujc6zUdMKioyv01iT0SZPGD0LFBta7lK6rZUuwX5OcdKN7K+S9xwZFZZ+s9D SAcS5v0K3Neg== X-IronPort-AV: E=McAfee;i="6200,9189,9974"; a="197724338" X-IronPort-AV: E=Sophos;i="5.82,273,1613462400"; d="scan'208";a="197724338" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2021 17:32:26 -0700 IronPort-SDR: roaeflJUzMbIdPqfYu//snYPz/jcvlf7Iez+eWxjvAEdyulf3N7WL8xhAqP51GegBkjQy8tLea FkILiWT9I2SQ== X-IronPort-AV: E=Sophos;i="5.82,273,1613462400"; d="scan'208";a="429490764" Received: from rpedgeco-mobl3.amr.corp.intel.com (HELO localhost.intel.com) ([10.209.26.68]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2021 17:32:25 -0700 From: Rick Edgecombe To: dave.hansen@intel.com, luto@kernel.org, peterz@infradead.org, linux-mm@kvack.org, x86@kernel.org, akpm@linux-foundation.org, linux-hardening@vger.kernel.org, kernel-hardening@lists.openwall.com Cc: ira.weiny@intel.com, rppt@kernel.org, dan.j.williams@intel.com, linux-kernel@vger.kernel.org, Rick Edgecombe Subject: [PATCH RFC 2/9] list: Support list head not in object for list_lru Date: Tue, 4 May 2021 17:30:25 -0700 Message-Id: <20210505003032.489164-3-rick.p.edgecombe@intel.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210505003032.489164-1-rick.p.edgecombe@intel.com> References: <20210505003032.489164-1-rick.p.edgecombe@intel.com> MIME-Version: 1.0 Authentication-Results: imf03.hostedemail.com; dkim=none; spf=none (imf03.hostedemail.com: domain of rick.p.edgecombe@intel.com has no SPF policy when checking 192.55.52.115) smtp.mailfrom=rick.p.edgecombe@intel.com; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=intel.com (policy=none) X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: CB65AC0007C6 X-Stat-Signature: w34w4trmoj1zjfzhi3benctb8k34z4r4 Received-SPF: none (intel.com>: No applicable sender policy available) receiver=imf03; identity=mailfrom; envelope-from=""; helo=mga14.intel.com; client-ip=192.55.52.115 X-HE-DKIM-Result: none/none X-HE-Tag: 1620174741-49680 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In future patches, there will be a need to keep track of objects with list_lru where the list_head is not in the object (will be in struct page). Since list_lru automatically determines the node id from the list_head, this will fail when using struct page. So create a new function in list_lru, list_lru_add_node(), that allows the node id of the item to be passed in. Otherwise it behaves exactly like list_lru_add(). Signed-off-by: Rick Edgecombe --- include/linux/list_lru.h | 13 +++++++++++++ mm/list_lru.c | 10 ++++++++-- 2 files changed, 21 insertions(+), 2 deletions(-) diff --git a/include/linux/list_lru.h b/include/linux/list_lru.h index 4bde44a5024b..7ad149b22223 100644 --- a/include/linux/list_lru.h +++ b/include/linux/list_lru.h @@ -90,6 +90,19 @@ void memcg_drain_all_list_lrus(int src_idx, struct mem_cgroup *dst_memcg); */ bool list_lru_add(struct list_lru *lru, struct list_head *item); +/** + * list_lru_add_node: add an element to the lru list's tail + * @list_lru: the lru pointer + * @item: the item to be added. + * @nid: the node id of the item + * + * Like list_lru_add, but takes the node id as parameter instead of + * calculating it from the list_head passed in. + * + * Return value: true if the list was updated, false otherwise + */ +bool list_lru_add_node(struct list_lru *lru, struct list_head *item, int nid); + /** * list_lru_del: delete an element to the lru list * @list_lru: the lru pointer diff --git a/mm/list_lru.c b/mm/list_lru.c index fd5b19dcfc72..8e32a6fc1527 100644 --- a/mm/list_lru.c +++ b/mm/list_lru.c @@ -112,9 +112,8 @@ list_lru_from_kmem(struct list_lru_node *nlru, void *ptr, } #endif /* CONFIG_MEMCG_KMEM */ -bool list_lru_add(struct list_lru *lru, struct list_head *item) +bool list_lru_add_node(struct list_lru *lru, struct list_head *item, int nid) { - int nid = page_to_nid(virt_to_page(item)); struct list_lru_node *nlru = &lru->node[nid]; struct mem_cgroup *memcg; struct list_lru_one *l; @@ -134,6 +133,13 @@ bool list_lru_add(struct list_lru *lru, struct list_head *item) spin_unlock(&nlru->lock); return false; } + +bool list_lru_add(struct list_lru *lru, struct list_head *item) +{ + int nid = page_to_nid(virt_to_page(item)); + + return list_lru_add_node(lru, item, nid); +} EXPORT_SYMBOL_GPL(list_lru_add); bool list_lru_del(struct list_lru *lru, struct list_head *item)