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=unavailable 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 A023BC433DF for ; Fri, 15 May 2020 13:18:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7A4EB20709 for ; Fri, 15 May 2020 13:18:15 +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="o4xNijdi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727831AbgEONSI (ORCPT ); Fri, 15 May 2020 09:18:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51270 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726585AbgEONRD (ORCPT ); Fri, 15 May 2020 09:17:03 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94DC3C05BD19; Fri, 15 May 2020 06:17:02 -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=aYJkiZGtapS3EI3nSaAZcijPUCj2H7jj4UUNli9ipQA=; b=o4xNijdiMl41kDuFLB3H7T+TfA ACNPaBxZh46ndjsZiHyYF3dDxXndNhMFBUhJqvCMnfBteuYm+BEfeAJIul5qFc+AS9zwJZ4YAHjty rmoD9yQE518yqJBXyMG6+M5mUj0txhwYqPBT1hDhK49s3rYGZiltF9giu+fLqchQRh/sAXz2jBwMt 1AbQEcqW+lcCKGgkMN5+s9hOs0DQxMWqO/AhiBHQb78C+oZKlwKCCHSRQ4Zz9WJC0Ug21UmeG0KOZ cmcpY9zzaFhYhTguPZAZrROFHS2QEkgoyg17db6hydV0l/96HS1CC6q00yEjQkxoNJ9oAGtH2Jylt etBt+Y4g==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jZaD0-0005kq-B3; 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 27/36] mm: Fix truncation for pages of arbitrary size Date: Fri, 15 May 2020 06:16:47 -0700 Message-Id: <20200515131656.12890-28-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: 8bit Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: "Matthew Wilcox (Oracle)" Remove the assumption that a compound page is HPAGE_PMD_SIZE, and the assumption that any page is PAGE_SIZE. Signed-off-by: Matthew Wilcox (Oracle) --- mm/truncate.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/mm/truncate.c b/mm/truncate.c index dd9ebc1da356..dad384a4dc6d 100644 --- a/mm/truncate.c +++ b/mm/truncate.c @@ -168,7 +168,7 @@ void do_invalidatepage(struct page *page, unsigned int offset, * becomes orphaned. It will be left on the LRU and may even be mapped into * user pagetables if we're racing with filemap_fault(). * - * We need to bale out if page->mapping is no longer equal to the original + * We need to bail out if page->mapping is no longer equal to the original * mapping. This happens a) when the VM reclaimed the page while we waited on * its lock, b) when a concurrent invalidate_mapping_pages got there first and * c) when tmpfs swizzles a page between a tmpfs inode and swapper_space. @@ -177,12 +177,12 @@ static void truncate_cleanup_page(struct address_space *mapping, struct page *page) { if (page_mapped(page)) { - pgoff_t nr = PageTransHuge(page) ? HPAGE_PMD_NR : 1; + unsigned int nr = hpage_nr_pages(page); unmap_mapping_pages(mapping, page->index, nr, false); } if (page_has_private(page)) - do_invalidatepage(page, 0, PAGE_SIZE); + do_invalidatepage(page, 0, thp_size(page)); /* * Some filesystems seem to re-dirty the page even after -- 2.26.2