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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 5D3A9C433ED for ; Sat, 8 May 2021 22:41:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4103E6100C for ; Sat, 8 May 2021 22:41:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229522AbhEHWmj (ORCPT ); Sat, 8 May 2021 18:42:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:46886 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229644AbhEHWmc (ORCPT ); Sat, 8 May 2021 18:42:32 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 7A0576141D; Sat, 8 May 2021 22:41:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1620513690; bh=JLkIp7tWRAaGI2ewFMoEZfha4ZB3NxQIJ1KmxwIfoHg=; h=Date:From:To:Subject:From; b=RpPH3oXOy+3cSAd9yDHPbOkAyDgsydgPjxTplq89tEY+mKCswEjdgFOHs/dMIvxRa QJu47UW92IJ3fviz4+Z+Gmx++WzIoMKokksIZ1KmF1633xHUet6i0D9WoqTi/z1YhN lxMvyub96EWczjhvUAjSjXbIHYMN348j4SbR69Ww= Date: Sat, 08 May 2021 15:41:30 -0700 From: akpm@linux-foundation.org To: duanxiongchun@bytedance.com, guro@fb.com, hannes@cmpxchg.org, mhocko@kernel.org, mm-commits@vger.kernel.org, shakeelb@google.com, songmuchun@bytedance.com, vdavydov.dev@gmail.com Subject: [merged] mm-memcontrol-change-ug-dummy_page-only-if-memcg-changed.patch removed from -mm tree Message-ID: <20210508224130.eRC8B138B%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: mm: memcontrol: change ug->dummy_page only if memcg changed has been removed from the -mm tree. Its filename was mm-memcontrol-change-ug-dummy_page-only-if-memcg-changed.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Muchun Song Subject: mm: memcontrol: change ug->dummy_page only if memcg changed Just like assignment to ug->memcg, we only need to update ug->dummy_page if memcg changed. So move it to there. This is a very small optimization. Link: https://lkml.kernel.org/r/20210319163821.20704-5-songmuchun@bytedance.com Signed-off-by: Muchun Song Acked-by: Johannes Weiner Reviewed-by: Shakeel Butt Cc: Michal Hocko Cc: Roman Gushchin Cc: Vladimir Davydov Cc: Xiongchun Duan Signed-off-by: Andrew Morton --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memcontrol.c~mm-memcontrol-change-ug-dummy_page-only-if-memcg-changed +++ a/mm/memcontrol.c @@ -6843,6 +6843,7 @@ static void uncharge_page(struct page *p uncharge_gather_clear(ug); } ug->memcg = page_memcg(page); + ug->dummy_page = page; /* pairs with css_put in uncharge_batch */ css_get(&ug->memcg->css); @@ -6856,7 +6857,6 @@ static void uncharge_page(struct page *p else ug->pgpgout++; - ug->dummy_page = page; page->memcg_data = 0; css_put(&ug->memcg->css); } _ Patches currently in -mm which might be from songmuchun@bytedance.com are