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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 F2EEAC2D0A3 for ; Thu, 29 Oct 2020 19:35:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 44E142087E for ; Thu, 29 Oct 2020 19:34:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Iw/i9Ycu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44E142087E 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 D5D816B006E; Thu, 29 Oct 2020 15:34:12 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CE7C16B0070; Thu, 29 Oct 2020 15:34:12 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AEF5F6B0071; Thu, 29 Oct 2020 15:34:12 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 659CD6B006E for ; Thu, 29 Oct 2020 15:34:12 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 167FC3624 for ; Thu, 29 Oct 2020 19:34:12 +0000 (UTC) X-FDA: 77425963944.13.smoke67_5d0a85e27290 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id E4F1918140B60 for ; Thu, 29 Oct 2020 19:34:11 +0000 (UTC) X-HE-Tag: smoke67_5d0a85e27290 X-Filterd-Recvd-Size: 2350 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf31.hostedemail.com (Postfix) with ESMTP for ; Thu, 29 Oct 2020 19:34:11 +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=lGF4HW3xTcYw5c4m1uJQR09qdQYmGLF0sDqvoEBnKwc=; b=Iw/i9Ycuo/RjVb7jovRKBRt3Eu g5R4Efdp+GOX3ielnOCclp45qFbW3YsCuCrbikcdZBo3L6W9xy2O7WMI2m6xI1yrLNj3WXyUTXt1v hfz6I58c39cVYrMCL9WNP3yvrbX4IwNUMlU2y5XltGV8eOr/9msH86oD/qNhhDh29Tt5mNLnKYccE tFViHnnDwYtNpmrJalI3BpozUl1m7VgOp29aNTh575wdE9KC2TCaP5rdiMZEsPFpC+iId6uw2YQp4 fQOiqw35i7gmozKL7dSg3jwil7aQKBY1HzIloSTksrEjwQWlIQ+a9FJFt21eiyaIMpiyXVOXl5ih/ gGNDLNWw==; Received: from willy by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYDgY-0007c6-3K; Thu, 29 Oct 2020 19:34:10 +0000 From: "Matthew Wilcox (Oracle)" To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" Subject: [PATCH 10/19] mm/vmscan: Optimise shrink_page_list for smaller THPs Date: Thu, 29 Oct 2020 19:33:56 +0000 Message-Id: <20201029193405.29125-11-willy@infradead.org> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20201029193405.29125-1-willy@infradead.org> References: <20201029193405.29125-1-willy@infradead.org> MIME-Version: 1.0 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 1c2e6ca92a45..9e140d19611a 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1300,7 +1300,8 @@ static unsigned int shrink_page_list(struct list_he= ad *page_list, enum ttu_flags flags =3D ttu_flags | 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 if (!try_to_unmap(page, flags)) { --=20 2.28.0