From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f200.google.com (mail-pf0-f200.google.com [209.85.192.200]) by kanga.kvack.org (Postfix) with ESMTP id 2C2146B0353 for ; Wed, 9 May 2018 03:49:21 -0400 (EDT) Received: by mail-pf0-f200.google.com with SMTP id r63so23961154pfl.12 for ; Wed, 09 May 2018 00:49:21 -0700 (PDT) Received: from bombadil.infradead.org (bombadil.infradead.org. [2607:7c80:54:e::133]) by mx.google.com with ESMTPS id p66si26602565pfg.329.2018.05.09.00.49.20 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 09 May 2018 00:49:20 -0700 (PDT) From: Christoph Hellwig 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> In-Reply-To: <20180509074830.16196-1-hch@lst.de> References: <20180509074830.16196-1-hch@lst.de> Sender: owner-linux-mm@kvack.org List-ID: To: linux-xfs@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-mm@kvack.org 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); } -- 2.17.0