From mboxrd@z Thu Jan 1 00:00:00 1970 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 8905EC433ED for ; Thu, 1 Apr 2021 21:24:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5046D60FED for ; Thu, 1 Apr 2021 21:24:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234791AbhDAVYw (ORCPT ); Thu, 1 Apr 2021 17:24:52 -0400 Received: from smtp.gentoo.org ([140.211.166.183]:58146 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234334AbhDAVYv (ORCPT ); Thu, 1 Apr 2021 17:24:51 -0400 Received: by sf.home (Postfix, from userid 1000) id 4C2B85A22061; Thu, 1 Apr 2021 22:24:47 +0100 (BST) From: Sergei Trofimovich To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Sergei Trofimovich , linux-mm@kvack.org Subject: [PATCH] mm: page_owner: fetch backtrace only for tracked pages Date: Thu, 1 Apr 2021 22:24:45 +0100 Message-Id: <20210401212445.3534721-1-slyfox@gentoo.org> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Very minor optimization. CC: Andrew Morton CC: linux-mm@kvack.org Signed-off-by: Sergei Trofimovich --- mm/page_owner.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/page_owner.c b/mm/page_owner.c index 63e4ecaba97b..7147fd34a948 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -140,14 +140,14 @@ void __reset_page_owner(struct page *page, unsigned int order) { int i; struct page_ext *page_ext; - depot_stack_handle_t handle = 0; + depot_stack_handle_t handle; struct page_owner *page_owner; - handle = save_stack(GFP_NOWAIT | __GFP_NOWARN); - page_ext = lookup_page_ext(page); if (unlikely(!page_ext)) return; + + handle = save_stack(GFP_NOWAIT | __GFP_NOWARN); for (i = 0; i < (1 << order); i++) { __clear_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags); page_owner = get_page_owner(page_ext); -- 2.31.1