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=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 4DC0BC3A5A7 for ; Wed, 4 Sep 2019 13:53:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 10D0E23401 for ; Wed, 4 Sep 2019 13:53:30 +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" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 10D0E23401 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=yandex-team.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3426F6B000E; Wed, 4 Sep 2019 09:53:27 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2F25C6B0010; Wed, 4 Sep 2019 09:53:27 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 084096B0266; Wed, 4 Sep 2019 09:53:27 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0027.hostedemail.com [216.40.44.27]) by kanga.kvack.org (Postfix) with ESMTP id D904D6B000E for ; Wed, 4 Sep 2019 09:53:26 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 7DC73180AD802 for ; Wed, 4 Sep 2019 13:53:26 +0000 (UTC) X-FDA: 75897380412.18.mouth01_1dfcd9e79b751 X-HE-Tag: mouth01_1dfcd9e79b751 X-Filterd-Recvd-Size: 3282 Received: from forwardcorp1o.mail.yandex.net (forwardcorp1o.mail.yandex.net [95.108.205.193]) by imf07.hostedemail.com (Postfix) with ESMTP for ; Wed, 4 Sep 2019 13:53:25 +0000 (UTC) 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 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: 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;