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=-6.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,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 0A1BAC433DF for ; Fri, 15 May 2020 13:40:11 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BD9BA20657 for ; Fri, 15 May 2020 13:40:10 +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="ET9GLrmZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD9BA20657 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 7039080053; Fri, 15 May 2020 09:40:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6E35990000C; Fri, 15 May 2020 09:40:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6177280053; Fri, 15 May 2020 09:40:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0078.hostedemail.com [216.40.44.78]) by kanga.kvack.org (Postfix) with ESMTP id 4AD3890000C for ; Fri, 15 May 2020 09:40:10 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 06EF72478 for ; Fri, 15 May 2020 13:40:10 +0000 (UTC) X-FDA: 76819062180.01.ray92_15a4d3af1a52 X-HE-Tag: ray92_15a4d3af1a52 X-Filterd-Recvd-Size: 2444 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf29.hostedemail.com (Postfix) with ESMTP for ; Fri, 15 May 2020 13:40:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=9r9vORbOytoazW3UXAiDTCw79E+Sm2pnv9qrsCelaEs=; b=ET9GLrmZusiuGd8+w8wbCKtksq dHQouvGiIMBcgTOT5pbeue0pK+qjSdB4XU53P5KZf+KkVyWWMLGd/5A7XSv+hk8gMvOSOzRbA/CBS zpROQ0FzI6PUN9sdNnMI64kAIza+LuDxMTcwDacw5xYVpT1GmY6vfRWQIljHVlR726StSb3Bq3E1E ABUqKezeRQBX1+lpFso9xn4dngqpoIJNBOS4xFWiojxiVRA/ui30BwtXQBry49aSljgMHIU7sNmqE 5DWE0n/jlkooNQ9JbFG5QRNiXeQFyKJM+YNLO84ZMqhdtACVIY/aaGrFsm8CstM34BdFES1qrnpt5 p/9GiqWg==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaD0-0005kH-8J; Fri, 15 May 2020 13:17:02 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 26/36] mm: Avoid splitting large pages Date: Fri, 15 May 2020 06:16:46 -0700 Message-Id: <20200515131656.12890-27-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200515131656.12890-1-willy@infradead.org> References: <20200515131656.12890-1-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: From: "Matthew Wilcox (Oracle)" If the filesystem supports large pages, then do not split them before removing them from the page cache; remove them as a unit. --- mm/vmscan.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index b06868fc4926..51e6c135575d 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1271,9 +1271,10 @@ static unsigned long shrink_page_list(struct list_= head *page_list, /* Adding to swap updated mapping */ mapping =3D page_mapping(page); } - } else if (unlikely(PageTransHuge(page))) { + } else if (PageTransHuge(page)) { /* Split file THP */ - if (split_huge_page_to_list(page, page_list)) + if (!mapping_large_pages(mapping) && + split_huge_page_to_list(page, page_list)) goto keep_locked; } =20 --=20 2.26.2