Oops, this should be [PATCHv2 3/3]. Jiaying On Tue, Jan 12, 2010 at 11:42 AM, Jiaying Zhang <jiayingz@xxxxxxxxxx> wrote: > > ext4: Use direct_IO_no_locking in ext4 dio read. > > Signed-off-by: Jiaying Zhang <jiayingz@xxxxxxxxxx> > > diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c > index 9ee3550..44d2e19 100644 > --- a/fs/ext4/inode.c > +++ b/fs/ext4/inode.c > @@ -3395,7 +3395,15 @@ 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 && test_opt(inode->i_sb, DIOREAD_NOLOCK) > + && (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)) > + 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)) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
