From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga09.intel.com ([134.134.136.24]:14275 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938977AbcJSTep (ORCPT ); Wed, 19 Oct 2016 15:34:45 -0400 From: Ross Zwisler Subject: [PATCH v8 01/16] ext4: tell DAX the size of allocation holes Date: Wed, 19 Oct 2016 13:34:20 -0600 Message-Id: <1476905675-32581-2-git-send-email-ross.zwisler@linux.intel.com> In-Reply-To: <1476905675-32581-1-git-send-email-ross.zwisler@linux.intel.com> References: <1476905675-32581-1-git-send-email-ross.zwisler@linux.intel.com> Sender: linux-xfs-owner@vger.kernel.org List-ID: List-Id: xfs To: linux-kernel@vger.kernel.org Cc: Ross Zwisler , Theodore Ts'o , Alexander Viro , Andreas Dilger , Andrew Morton , Christoph Hellwig , Dan Williams , Dave Chinner , Jan Kara , Matthew Wilcox , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-nvdimm@lists.01.org, linux-xfs@vger.kernel.org When DAX calls _ext4_get_block() and the file offset points to a hole we currently don't set bh->b_size. This is current worked around via buffer_size_valid() in fs/dax.c. _ext4_get_block() has the hole size information from ext4_map_blocks(), so populate bh->b_size so we can remove buffer_size_valid() in a later patch. Signed-off-by: Ross Zwisler Reviewed-by: Jan Kara --- fs/ext4/inode.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9c06472..3d58b2b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -767,6 +767,9 @@ static int _ext4_get_block(struct inode *inode, sector_t iblock, ext4_update_bh_state(bh, map.m_flags); bh->b_size = inode->i_sb->s_blocksize * map.m_len; ret = 0; + } else if (ret == 0) { + /* hole case, need to fill in bh->b_size */ + bh->b_size = inode->i_sb->s_blocksize * map.m_len; } return ret; } -- 2.7.4