diff options
| author | Zheng Liu <[email protected]> | 2012-07-22 20:19:31 -0400 |
|---|---|---|
| committer | Theodore Ts'o <[email protected]> | 2012-07-22 20:19:31 -0400 |
| commit | 4bd809dbbf177ad0c450d702466b1da63e1b4b7e (patch) | |
| tree | 80493da203ac42a448489bc8e589207b9f735c2b /lib/mpi/mpi-add.c | |
| parent | 729f52c6be51013c9268e5fc85acbc1091286fdb (diff) | |
ext4: don't take the i_mutex lock when doing DIO overwrites
Aligned and overwrite direct I/O can be parallelized. In
ext4_file_dio_write, we first check whether these conditions are
satisfied or not. If so, we take i_data_sem and release i_mutex lock
directly. Meanwhile iocb->private is set to indicate that this is a
dio overwrite, and it will be handled in ext4_ext_direct_IO.
[ Added fix from Dan Carpenter to fix locking bug on the error path. ]
CC: Tao Ma <[email protected]>
CC: Eric Sandeen <[email protected]>
CC: Robin Dong <[email protected]>
Signed-off-by: Zheng Liu <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
Signed-off-by: Dan Carpenter <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-add.c')
0 files changed, 0 insertions, 0 deletions