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authorJiaying Zhang <jiayingz@google.com>2010-03-02 13:26:36 -0500
committerTheodore Ts'o <tytso@mit.edu>2010-03-02 13:26:36 -0500
commitb7adc1f363e72e9131a582cc2cb00eaf83f51a39 (patch)
tree9316acb7855ef64f051b4ee4c01f431c15cb4c1e /fs/ext4
parent744692dc059845b2a3022119871846e74d4f6e11 (diff)
downloadblackbird-op-linux-b7adc1f363e72e9131a582cc2cb00eaf83f51a39.tar.gz
blackbird-op-linux-b7adc1f363e72e9131a582cc2cb00eaf83f51a39.zip
ext4: Use direct_IO_no_locking in ext4 dio read
Signed-off-by: Jiaying Zhang <jiayingz@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/inode.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d291310aef6b..92214d4e5afa 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3474,7 +3474,14 @@ 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))
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