From patchwork Fri May 18 16:48:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 10411313 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 17C73601F9 for ; Fri, 18 May 2018 16:49:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04FB628619 for ; Fri, 18 May 2018 16:49:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EDFCB288BD; Fri, 18 May 2018 16:49:48 +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 977DB28619 for ; Fri, 18 May 2018 16:49:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752438AbeERQtq (ORCPT ); Fri, 18 May 2018 12:49:46 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:50018 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752339AbeERQt0 (ORCPT ); Fri, 18 May 2018 12:49:26 -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=eMAldgieaTfmuyiT4prrdJxDyFkWwZT9XIapZ/7tnbY=; b=c6FgBKvRqlLf/8dkxu3f3rPlk 2ROpvzxUXiSlK283MwP83Mwo8ihhV47uI+yOGaKyh0ABOTk0GDrmavv3WrRbrEYaleJ3FqMhJjPRO HhKNhG+vRgaJTmJ61ZOfVbAZ2UXuaX7v2NL4unosd60tSjqf6dwzRixZVTev4a2J4q5S4G1Zq8Ds1 w2QREOlsAx9o011LulQw9IOA+0s02nZ6iCXrG+Ya9/oW8SA/Ztg7CvmB56HO4QcxMR6LgDxA3KXcM WW2ahK74nJREhMEkDHt2sPHiOheeJoB4yGGHSNXIiszwSllaJ9WC7H6fXOUWJnW7L5XxRaHl+/X7Q uOX/Z2wRg==; Received: from 80-109-164-210.cable.dynamic.surfer.at ([80.109.164.210] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fJiZJ-0006b2-AC; Fri, 18 May 2018 16:49:25 +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 18/34] xfs: use iomap for blocksize == PAGE_SIZE readpage and readpages Date: Fri, 18 May 2018 18:48:14 +0200 Message-Id: <20180518164830.1552-19-hch@lst.de> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180518164830.1552-1-hch@lst.de> References: <20180518164830.1552-1-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 56e405572909..c631c457b444 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); }