From patchwork Wed May 9 07:48:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10388373 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id CA84660170 for ; Wed, 9 May 2018 07:49:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BCD7028E05 for ; Wed, 9 May 2018 07:49:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B1AA628E2B; Wed, 9 May 2018 07:49:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 64D6128E05 for ; Wed, 9 May 2018 07:49:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933902AbeEIHtW (ORCPT ); Wed, 9 May 2018 03:49:22 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:51942 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933832AbeEIHtU (ORCPT ); Wed, 9 May 2018 03:49:20 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=c+n2pjwbxBxH/RCL8G1gxw+WLHPe+c9D/8QyHqwqdVo=; b=QG0aakvIMjsRGxzaFQEMq+omI xp1A2j/jlF+ibaB3fG/IGQxXsheEYUfhLSFS83aatPj7mmR39z8QSwavC1gaeGh+9bW9hHYBdcV0Q laQvxjrb+KhWvSG32sr5p2lDQuddCmmStr7o4ljO2b0LAQpkwt3m2nqw/qnaCJp+22Izry1FXUSDf A4/LwCn8Mm0x3QxVlFl2KwlodtzFYeaRxYVBgL0KqIYZIF5Awslu3Dnny2rRpU3SZvY0VDAANcytB z5xuLwuEvyaVA4i3pspbS6s4a4uPrnUKNysu4MU12uBN1HvS2pQ2dgAMuw0l++AqSMVY3wbFJx/9t KCdtII1qg==; Received: from 213-225-15-246.nat.highway.a1.net ([213.225.15.246] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fGJqh-0001Xd-1R; Wed, 09 May 2018 07:49:19 +0000 From: Christoph Hellwig To: linux-xfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 13/33] xfs: use iomap for blocksize == PAGE_SIZE readpage and readpages Date: Wed, 9 May 2018 09:48:10 +0200 Message-Id: <20180509074830.16196-14-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180509074830.16196-1-hch@lst.de> References: <20180509074830.16196-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For file systems with a block size that equals the page size we never do partial reads, so we can use the buffer_head-less iomap versions of readpage and readpages without conflicting with the buffer_head structures create later in write_begin. Signed-off-by: Christoph Hellwig --- fs/xfs/xfs_aops.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 8b06be0a80da..8e4d01e76fc8 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -1402,6 +1402,8 @@ xfs_vm_readpage( struct page *page) { trace_xfs_vm_readpage(page->mapping->host, 1); + if (i_blocksize(page->mapping->host) == PAGE_SIZE) + return iomap_readpage(page, &xfs_iomap_ops); return mpage_readpage(page, xfs_get_blocks); } @@ -1413,6 +1415,8 @@ xfs_vm_readpages( unsigned nr_pages) { trace_xfs_vm_readpages(mapping->host, nr_pages); + if (i_blocksize(mapping->host) == PAGE_SIZE) + return iomap_readpages(mapping, pages, nr_pages, &xfs_iomap_ops); return mpage_readpages(mapping, pages, nr_pages, xfs_get_blocks); }