AcoSail/kernel_optimize_test
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ext4: Use direct_IO_no_locking in ext4 dio read

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Signed-off-by: Jiaying Zhang <jiayingz@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Jiaying Zhang 2010-03-02 13:26:36 -05:00 committed by Theodore Ts'o
parent 744692dc05
commit b7adc1f363
1 changed files with 8 additions and 1 deletions
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9
fs/ext4/inode.c
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@ -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))