kernel_optimize_test/fs/ocfs2
jiangyiwen 4e357b932a ocfs2: fill in the unused portion of the block with zeros by dio_zero_block()
A simplified test case is (this case from Ryan):
1) dd if=/dev/zero of=/mnt/hello bs=512 count=1 oflag=direct;
2) truncate /mnt/hello -s 2097152
file 'hello' is not exist before test. After this command,
file 'hello' should be all zero. But 512~4096 is some random data.

Setting bh state to new when get a new block, if so,
direct_io_worker()->dio_zero_block() will fill-in the unused portion
of the block with zero.

Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-11-05 19:34:48 -08:00
..
cluster ocfs2: use 64bit variables to track heartbeat time 2015-09-04 16:54:41 -07:00
dlm ocfs2/dlm: unlock lockres spinlock before dlm_lockres_put 2015-10-23 17:55:10 +09:00
dlmfs VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
acl.c ocfs2: take inode lock in ocfs2_iop_set/get_acl() 2015-09-04 16:54:41 -07:00
acl.h
alloc.c ocfs2: clean up redundant NULL checks before kfree 2015-09-04 16:54:41 -07:00
alloc.h
aops.c ocfs2: fill in the unused portion of the block with zeros by dio_zero_block() 2015-11-05 19:34:48 -08:00
aops.h ocfs2: remove OCFS2_IOCB_SEM lock type in direct io 2015-06-24 17:49:39 -07:00
blockcheck.c
blockcheck.h
buffer_head_io.c ocfs2: clear the rest of the buffers on error 2015-09-04 16:54:41 -07:00
buffer_head_io.h
dcache.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
dcache.h
dir.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
dir.h VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
dlmglue.c ocfs2: remove unneeded code in ocfs2_dlm_init 2015-09-04 16:54:41 -07:00
dlmglue.h
export.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
export.h
extent_map.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
extent_map.h
file.c ocfs2: fix BUG_ON() in ocfs2_ci_checkpointed() 2015-09-04 16:54:41 -07:00
file.h ocfs2: prepare some interfaces used in append direct io 2015-02-16 17:56:04 -08:00
heartbeat.c
heartbeat.h
inode.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
inode.h ocfs2: fix race between dio and recover orphan 2015-09-04 16:54:41 -07:00
ioctl.c ioctl_compat: handle FITRIM 2015-07-09 11:42:21 -07:00
ioctl.h
journal.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
journal.h ocfs2: add functions to add and remove inode in orphan dir 2015-02-16 17:56:04 -08:00
Kconfig
localalloc.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
localalloc.h
locks.c
locks.h
Makefile
mmap.c mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub 2015-02-10 14:30:30 -08:00
mmap.h
move_extents.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
move_extents.h
namei.c ocfs2: fix a tiny case that inode can not removed 2015-09-04 16:54:41 -07:00
namei.h ocfs2: fix a tiny race when truncate dio orohaned entry 2015-06-24 17:49:39 -07:00
ocfs1_fs_compat.h
ocfs2_fs.h treewide: fix typos in comment blocks 2015-08-07 14:46:24 +02:00
ocfs2_ioctl.h
ocfs2_lockid.h
ocfs2_lockingver.h
ocfs2_trace.h
ocfs2.h ocfs2: add errors=continue 2015-09-04 16:54:41 -07:00
quota_global.c
quota_local.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
quota.h
refcounttree.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
refcounttree.h
reservations.c ocfs2: make resv_lock spinlock static 2015-02-10 14:30:29 -08:00
reservations.h
resize.c
resize.h
slot_map.c ocfs2: one function call less in ocfs2_init_slot_info() after error detection 2015-04-14 16:48:57 -07:00
slot_map.h
stack_o2cb.c ocfs2: avoid a pointless delay in o2cb_cluster_check() 2015-04-14 16:48:57 -07:00
stack_user.c char: make misc_deregister a void function 2015-08-05 10:35:49 -07:00
stackglue.c
stackglue.h
suballoc.c ocfs2: clean up redundant NULL checks before kfree 2015-09-04 16:54:41 -07:00
suballoc.h
super.c fs: create and use seq_show_option for escaping 2015-09-04 16:54:41 -07:00
super.h ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
symlink.c
symlink.h
sysfile.c
sysfile.h
uptodate.c
uptodate.h
xattr.c ocfs2: neaten do_error, ocfs2_error and ocfs2_abort 2015-09-04 16:54:41 -07:00
xattr.h