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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 C290AC07E96 for ; Thu, 15 Jul 2021 05:28:04 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 746E6610C7 for ; Thu, 15 Jul 2021 05:28:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 746E6610C7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C743F8D008F; Thu, 15 Jul 2021 01:28:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BFC358D0065; Thu, 15 Jul 2021 01:28:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A9CB78D008F; Thu, 15 Jul 2021 01:28:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0008.hostedemail.com [216.40.44.8]) by kanga.kvack.org (Postfix) with ESMTP id 7DEE78D0065 for ; Thu, 15 Jul 2021 01:28:04 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 73B6D18046DB4 for ; Thu, 15 Jul 2021 05:28:03 +0000 (UTC) X-FDA: 78363690846.04.F4AF888 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf25.hostedemail.com (Postfix) with ESMTP id 39314B0002A9 for ; Thu, 15 Jul 2021 05:28:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=5ILLJtmg4y7//Nl5cqO6Dt5oKOASFCS0mS2xCX9QyaA=; b=rssLRkif3t/tSVMHXk5c7aqrPF tmQzfdg5A7AVrJdCKgh6hqc3VrLK5+CXT/LRghngVX1rUsJvmB3sCMEXBrczqRSQ3UVQ/oboWCUlW O+v3hWasBVRHwszi7py/QLZ2F642acp6xDEL/WOiZvf/MrYaB26iPSdfSx1jkbGmez1q/v+reqoW1 +n00MTXt0Wfeodco8WSHQ+ijBd94fFdDGSX7O/gxAcauUcyJS6SZrILn+4i1HsDQAzJsQKkz6JhXe LmvIMAK8Mmb5sluf4xgp/VdtsNZ0/v4pGyYqPw9Vp0k8XmfB7srRXdrDdf2exrmol83pWZ2j87k/y YQ0Il39g==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m3ttl-0031BC-3m; Thu, 15 Jul 2021 05:27:10 +0000 From: "Matthew Wilcox (Oracle)" To: linux-kernel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v14 136/138] mm/vmscan: Optimise shrink_page_list for smaller THPs Date: Thu, 15 Jul 2021 04:37:02 +0100 Message-Id: <20210715033704.692967-137-willy@infradead.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210715033704.692967-1-willy@infradead.org> References: <20210715033704.692967-1-willy@infradead.org> MIME-Version: 1.0 Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=rssLRkif; spf=none (imf25.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Rspamd-Server: rspam05 X-Stat-Signature: atwdhwkwmbpsf19f6ebozafb4p5b1qhy X-Rspamd-Queue-Id: 39314B0002A9 X-HE-Tag: 1626326883-1521 Content-Transfer-Encoding: quoted-printable 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: A THP which is smaller than a PMD does not need to do the extra work in try_to_unmap() of trying to split a PMD entry. Signed-off-by: Matthew Wilcox (Oracle) --- mm/vmscan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 8b17e46dbf32..433956675107 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1496,7 +1496,8 @@ static unsigned int shrink_page_list(struct list_he= ad *page_list, enum ttu_flags flags =3D TTU_BATCH_FLUSH; bool was_swapbacked =3D PageSwapBacked(page); =20 - if (unlikely(PageTransHuge(page))) + if (PageTransHuge(page) && + thp_order(page) >=3D HPAGE_PMD_ORDER) flags |=3D TTU_SPLIT_HUGE_PMD; =20 try_to_unmap(page, flags); --=20 2.30.2