From: Theodore Ts'o Subject: [PATCH v4 3/3] ext4: Use direct_IO_no_locking in ext4 dio read. Date: Fri, 15 Jan 2010 14:30:12 -0500 Message-ID: <1263583812-21355-4-git-send-email-tytso@mit.edu> References: <1263583812-21355-1-git-send-email-tytso@mit.edu> Cc: Theodore Ts'o , Jiaying Zhang To: Ext4 Developers List Return-path: Received: from THUNK.ORG ([69.25.196.29]:60040 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754052Ab0AOTaS (ORCPT ); Fri, 15 Jan 2010 14:30:18 -0500 In-Reply-To: <1263583812-21355-1-git-send-email-tytso@mit.edu> Sender: linux-ext4-owner@vger.kernel.org List-ID: Signed-off-by: Jiaying Zhang Signed-off-by: "Theodore Ts'o" --- fs/ext4/inode.c | 9 ++++++++- 1 files changed, 8 insertions(+), 1 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 1f56484..ec0bbdd 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3419,7 +3419,14 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb, } retry: - ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov, + if (rw == READ && ext4_should_dioread_nolock(inode)) + ret = blockdev_direct_IO_no_locking(rw, iocb, inode, + inode->i_sb->s_bdev, iov, + offset, nr_segs, + ext4_get_block, NULL); + else + ret = blockdev_direct_IO(rw, iocb, inode, + inode->i_sb->s_bdev, iov, offset, nr_segs, ext4_get_block, NULL); if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) -- 1.6.5.216.g5288a.dirty