Zheng Liu 4bd809dbbf 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 <tm@tao.ma>
CC: Eric Sandeen <sandeen@redhat.com>
CC: Robin Dong <hao.bigrat@gmail.com>
Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>

2012-07-22 20:19:31 -04:00

..

acl.c

switch posix_acl_equiv_mode() to umode_t *

2011-08-01 02:10:06 -04:00

acl.h

fs: take the ACL checks to common code

2011-07-25 14:30:23 -04:00

balloc.c

ext4: pass a char * to ext4_count_free() instead of a buffer_head ptr

2012-06-30 19:14:57 -04:00

bitmap.c

ext4: fix overhead calculation used by ext4_statfs()

2012-07-09 16:27:05 -04:00

block_validity.c

ext2/3/4: delete unneeded includes of module.h

2012-01-09 13:52:10 +01:00

dir.c

ext4: calculate and verify checksums of directory leaf blocks

2012-04-29 18:41:10 -04:00

ext4_extents.h

ext4: verify and calculate checksums for extent tree blocks

2012-04-29 18:37:10 -04:00

ext4_jbd2.c

ext4: calculate and verify superblock checksum

2012-04-29 18:29:10 -04:00

ext4_jbd2.h

ext4: calculate and verify superblock checksum

2012-04-29 18:29:10 -04:00

ext4.h

ext4: add a new nolock flag in ext4_map_blocks

2012-07-09 16:29:29 -04:00

extents.c

ext4: fix out-of-date comments in extents.c

2012-07-09 16:29:28 -04:00

file.c

ext4: don't take the i_mutex lock when doing DIO overwrites

2012-07-22 20:19:31 -04:00

fsync.c

ext4: fix race between sync and completed io work

2012-03-05 10:29:52 -05:00

hash.c

ext4: return 32/64-bit dir name hash according to usage type

2012-03-18 22:44:40 -04:00

ialloc.c

ext4: pass a char * to ext4_count_free() instead of a buffer_head ptr

2012-06-30 19:14:57 -04:00

indirect.c

ext2/3/4: delete unneeded includes of module.h

2012-01-09 13:52:10 +01:00

inode.c

ext4: don't take the i_mutex lock when doing DIO overwrites

2012-07-22 20:19:31 -04:00

ioctl.c

ext4: don't set i_flags in EXT4_IOC_SETFLAGS

2012-06-07 19:04:19 -04:00

Kconfig

ext4: load the crc32c driver if necessary

2012-04-29 18:27:10 -04:00

Makefile

ext4: move ext4_ind_* functions from inode.c to indirect.c

2011-06-27 19:40:50 -04:00

mballoc.c

ext4: remove an unused statement in ext4_mb_get_buddy_page_lock()

2012-07-09 16:29:28 -04:00

mballoc.h

ext4: remove EXT4_MB_{BITMAP,BUDDY} macros

2012-02-20 17:54:06 -05:00

migrate.c

userns: Convert ext4 to user kuid/kgid where appropriate

2012-05-15 14:59:27 -07:00

mmp.c

ext4: add checksums to the MMP block

2012-04-29 18:47:10 -04:00

move_extent.c

ext4: add some tracepoints in ext4/extents.c

2011-09-09 19:18:51 -04:00

namei.c

ext4: use proper csum calculation in ext4_rename

2012-07-09 16:29:05 -04:00

page-io.c

Revert "ext4: don't release page refs in ext4_end_bio()"

2012-03-29 17:00:56 -07:00

resize.c

ext4: fix overhead calculation used by ext4_statfs()

2012-07-09 16:27:05 -04:00

super.c

ext4: fix overhead calculation used by ext4_statfs()

2012-07-09 16:27:05 -04:00

symlink.c

ext4: symlink must be handled via filesystem specific operation

2010-05-16 02:00:00 -04:00

truncate.h

ext4: move common truncate functions to header file

2011-06-27 19:16:04 -04:00

xattr_security.c

Merge branch 'for_linus' into for_linus_merged

2012-01-10 11:54:07 -05:00

xattr_trusted.c

ext2/3/4: delete unneeded includes of module.h

2012-01-09 13:52:10 +01:00

xattr_user.c

ext2/3/4: delete unneeded includes of module.h

2012-01-09 13:52:10 +01:00

xattr.c

ext4: use s_csum_seed instead of i_csum_seed for xattr block

2012-07-09 16:29:27 -04:00

xattr.h

ext4: change on-disk layout to support extended metadata checksumming

2012-04-29 18:23:10 -04:00