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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 2B972C3A5A7 for ; Wed, 4 Sep 2019 13:53:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03A8A23401 for ; Wed, 4 Sep 2019 13:53:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="Z4jm5Q2L" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730511AbfIDNxa (ORCPT ); Wed, 4 Sep 2019 09:53:30 -0400 Received: from forwardcorp1o.mail.yandex.net ([95.108.205.193]:59498 "EHLO forwardcorp1o.mail.yandex.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730457AbfIDNxZ (ORCPT ); Wed, 4 Sep 2019 09:53:25 -0400 Received: from mxbackcorp1g.mail.yandex.net (mxbackcorp1g.mail.yandex.net [IPv6:2a02:6b8:0:1402::301]) by forwardcorp1o.mail.yandex.net (Yandex) with ESMTP id 182CE2E1AF9; Wed, 4 Sep 2019 16:53:23 +0300 (MSK) Received: from smtpcorp1p.mail.yandex.net (smtpcorp1p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:10]) by mxbackcorp1g.mail.yandex.net (nwsmtp/Yandex) with ESMTP id aEmyyOzLzc-rMC8F2bH; Wed, 04 Sep 2019 16:53:23 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1567605203; bh=tOkluSvMOilQtaQgeVN/jbLnmLXdvX3Fp9s5Z6P8s1g=; h=In-Reply-To:Message-ID:References:Date:To:From:Subject:Cc; b=Z4jm5Q2LTUYVSo8olrY0Quoi7AQsTBhZjF73yqtYmYod1nau/phdgy6bQwtVIC7rj 788ePHQp13uvQW1vUeIf1xWUaY30sg+qS9qy1od1dkNufOcq1HIh0Z6xLrECdoAQoF GlBmDVdNCEbC2tjP/Z03EJTXlxSojcqYxr6uTv9Y= Authentication-Results: mxbackcorp1g.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from dynamic-red.dhcp.yndx.net (dynamic-red.dhcp.yndx.net [2a02:6b8:0:40c:c142:79c2:9d86:677a]) by smtpcorp1p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id wlKkVkryLz-rMDao1Sr; Wed, 04 Sep 2019 16:53:22 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client certificate not present) Subject: [PATCH v1 7/7] mm/mlock: recharge mlocked pages at culling by vmscan From: Konstantin Khlebnikov To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org Cc: Michal Hocko , Roman Gushchin , Johannes Weiner Date: Wed, 04 Sep 2019 16:53:22 +0300 Message-ID: <156760520240.6560.4933207338618527335.stgit@buzz> In-Reply-To: <156760509382.6560.17364256340940314860.stgit@buzz> References: <156760509382.6560.17364256340940314860.stgit@buzz> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If mlock cannot catch page in LRU then it isn't moved into unevictable lru. These pages are 'culled' by reclaimer and moved into unevictable lru. It seems pages locked with MLOCK_ONFAULT always go through this path. Reclaimer calls try_to_unmap for already isolated pages, thus on this path we could freely change page to owner of any mlock vma we found in rmap. This patch passes flag TTU_LRU_ISOLATED into try_to_ummap to move pages in mmlock_vma_page(). Signed-off-by: Konstantin Khlebnikov --- mm/vmscan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index bf7a05e8a717..2060f254dd6b 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1345,7 +1345,8 @@ static unsigned long shrink_page_list(struct list_head *page_list, * processes. Try to unmap it here. */ if (page_mapped(page)) { - enum ttu_flags flags = ttu_flags | TTU_BATCH_FLUSH; + enum ttu_flags flags = ttu_flags | TTU_BATCH_FLUSH | + TTU_LRU_ISOLATED; if (unlikely(PageTransHuge(page))) flags |= TTU_SPLIT_HUGE_PMD;