Received: by 2002:a25:683:0:0:0:0:0 with SMTP id 125csp845957ybg; Wed, 10 Jun 2020 15:35:57 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyIHjGuo4jEGIMDlxJCX9BipO6/l5nAnK4pK2BgqgjvAgLi+FkgtwlCzsKVSRfF+Ec+PZl5 X-Received: by 2002:a17:906:b293:: with SMTP id q19mr5849204ejz.412.1591828557674; Wed, 10 Jun 2020 15:35:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1591828557; cv=none; d=google.com; s=arc-20160816; b=DsBbZlAZXZHoNkpzhnPFYfX6SmWqB3ZXKyNpPLK1ecbTRaJGPAKGHm/oWw5l4fOVvV aED1ahUtP6QuppiqWe0yXiwSZ/6iJdrLCAccAK+wdmtqoFD168D8Ye0wNcblcL2+Ss88 snymUPHnbHRR+6OIXFktrqU7YgUDqIyT5dE+ykq53991tk2/Jfdi+dW5FLXTCb6NSlPY GwZaIaird/7n4hfhHGVhy+xU6zEPPe1e1t5a4+67btxhnIu04TR+amUTkNXnjK0hE/5D VCjKG+t+3F1jcNMf4yxscju9YO40nENNJ7JzzdkIISylrNvC7b35mJdzkpCDz+SkLLGx iZAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=hjtxBqocMNhYkpp8Xg/ALyMhtyMIq4PqDFO3IKqKJpw=; b=w18DlWl3/m2g36HUFo7JfSXUl7aVewTB+bUddZitzXnQGf49+xx59fQd477aMzK95R RJ0cly6bLulVLeNeIvinoyj0Dn62W+/mb9V2Cn3ETKXGne8mWBje8TjAJ5lStVZ+tQ62 5u9X7lMgkJO+kXBZ1i4VDiXisabefI9sOJ2ksNRHjNrO4mlwmoWrKWzUsVIoERw4kQmn usyV7qMgQukLnhZNEiwMI83LfH6fi4e5heSabq6M6fKzU9RSWK9vIEO8QmSGGlJ5TmSy hLOgtpAUFCO5Hq0lMFim7P/gJEjePhiXlc5kVl2BR7faqmTsvzX5QjMbkgXFKMBhp90H 0Zbw== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=oDy2sEk0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id p20si872160ejg.263.2020.06.10.15.35.33; Wed, 10 Jun 2020 15:35:57 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=oDy2sEk0; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730743AbgFJUPF (ORCPT + 99 others); Wed, 10 Jun 2020 16:15:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60524 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730583AbgFJUNw (ORCPT ); Wed, 10 Jun 2020 16:13:52 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3BE77C00863E; Wed, 10 Jun 2020 13:13:49 -0700 (PDT) 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=hjtxBqocMNhYkpp8Xg/ALyMhtyMIq4PqDFO3IKqKJpw=; b=oDy2sEk0C4TA1UDvwaLLIZI1pR JOfaoKJP5U4cmw6dzVSzyT3+5dHoqA5/I+266eum7s4YMxumC41j4BEMSKdVFxg0rqbQ8EbzxBcW0 tmcsUU+gXd4itwdzOvXJ5v/MZm8kd3gIKt+aNO9QygBxeQtig1m/7iTG4ECvpESE77noHDK+IW6z/ RWTDg2rHeESxtEQ+zT5ERB5MxcdUm10gFtU4uXzT6dJeOzmjFm7ALjQgKjbnjA3BIGOttq2nL0j8H Ol3SEWEzBDX1QHTfee6yb1WHMFl6UnuTzt1vzj5CoH3AmzGf6wiJnf5AqBFcKttjctcP7bhSRSrfN QhauW/9Q==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jj76b-0003Xr-3g; Wed, 10 Jun 2020 20:13:49 +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 v6 45/51] mm: Support tail pages in wait_for_stable_page Date: Wed, 10 Jun 2020 13:13:39 -0700 Message-Id: <20200610201345.13273-46-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200610201345.13273-1-willy@infradead.org> References: <20200610201345.13273-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 28b3e7a67565..1b358aac065f 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2851,6 +2851,7 @@ EXPORT_SYMBOL_GPL(wait_on_page_writeback); */ void wait_for_stable_page(struct page *page) { + page = thp_head(page); if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host))) wait_on_page_writeback(page); } -- 2.26.2