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=-9.6 required=3.0 tests=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 DB2ADC433DF for ; Fri, 15 May 2020 13:40:28 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 96CE620657 for ; Fri, 15 May 2020 13:40:28 +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="Ouac5fKO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 96CE620657 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 09D7C80059; Fri, 15 May 2020 09:40:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F184880054; Fri, 15 May 2020 09:40:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E2E7C80059; Fri, 15 May 2020 09:40:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0131.hostedemail.com [216.40.44.131]) by kanga.kvack.org (Postfix) with ESMTP id CA58F80054 for ; Fri, 15 May 2020 09:40:21 -0400 (EDT) Received: from smtpin08.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 860E58248047 for ; Fri, 15 May 2020 13:40:21 +0000 (UTC) X-FDA: 76819062642.08.seat52_3187e79a632c X-HE-Tag: seat52_3187e79a632c X-Filterd-Recvd-Size: 2297 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf50.hostedemail.com (Postfix) with ESMTP for ; Fri, 15 May 2020 13:40:21 +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=EpnkLjZqk1S3DSmVdcLM12MdJ2sgIE4S7yU2k8eu7Iw=; b=Ouac5fKOcAvAmnZMVvgIPIulHz DBYXu8tRuuU2a1+ObC+C8BwL0TvJlGyVB2yuMmX+Yt5T2jW2NDuiC1XnYHtaW2rmMH15oyeWPkVDd uWHxTwHy06J+v1q+Z7YcZmhjqG+5wkRycaYFO6Td47uoQiauEsfZWpQJH/MOutPZmGXJt7AW20Nfq NZU/AQg9di4fKaqnG3jm/1CZ4gb0IFH/WgWCC2yb1Aw8MlUVSooBh2QbM+UrqLwZ2kGNSKXsN0qO1 F/QddNe1SrlYeEjhcgOYx2ZIpQmezI0VcBi2wn45FMUyqdG8I6/gQwedLDAzNeQUhpUCoCbspc1Tb slpHaFWA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaD0-0005nF-Jh; 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 30/36] mm: Support tail pages in wait_for_stable_page Date: Fri, 15 May 2020 06:16:50 -0700 Message-Id: <20200515131656.12890-31-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)" page->mapping is undefined for tail pages, so operate exclusively on the head page. Signed-off-by: Matthew Wilcox (Oracle) --- mm/page-writeback.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 7326b54ab728..e2da7d7e93b8 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2841,6 +2841,7 @@ EXPORT_SYMBOL_GPL(wait_on_page_writeback); */ void wait_for_stable_page(struct page *page) { + page =3D compound_head(page); if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host))) wait_on_page_writeback(page); } --=20 2.26.2