From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 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> In-Reply-To: <20180518164830.1552-1-hch@lst.de> References: <20180518164830.1552-1-hch@lst.de> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.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 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); } -- 2.17.0