kernel_optimize_test/fs/ext4
Mingming Cao 525f4ed8dc ext4: journal credit fix for the delayed allocation's writepages() function
Previous delalloc writepages implementation started a new transaction
outside of a loop which called get_block() to do the block allocation.
Since we didn't know exactly how many blocks would need to be allocated,
the estimated journal credits required was very conservative and caused
many issues.

With the reworked delayed allocation, a new transaction is created for
each get_block(), thus we don't need to guess how many credits for the
multiple chunk of allocation.  We start every transaction with enough
credits for inserting a single exent.  When estimate the credits for
indirect blocks to allocate a chunk of blocks, we need to know the
number of data blocks to allocate.  We use the total number of reserved
delalloc datablocks; if that is too big, for non-extent files, we need
to limit the number of blocks to EXT4_MAX_TRANS_BLOCKS.

Code cleanup from Aneesh.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Reviewed-off-by:  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2008-08-19 22:15:58 -04:00
..
acl.c [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
acl.h [PATCH] sanitize ->permission() prototype 2008-07-26 20:53:14 -04:00
balloc.c ext4: lock block groups when initializing 2008-08-02 21:21:08 -04:00
bitmap.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
dir.c ext4: Fix ext4_dx_readdir hash collision handling 2008-08-19 21:57:43 -04:00
ext4_extents.h ext4: journal credits reservation fixes for extent file writepage 2008-08-19 22:16:05 -04:00
ext4_i.h ext4: delayed allocation ENOSPC handling 2008-07-14 17:52:37 -04:00
ext4_jbd2.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
ext4_jbd2.h ext4: journal credits calulation cleanup and fix for non-extent writepage 2008-08-19 22:16:07 -04:00
ext4_sb.h ext4: New inode allocation for FLEX_BG meta-data groups. 2008-07-11 19:27:31 -04:00
ext4.h ext4: journal credits reservation fixes for DIO, fallocate 2008-08-19 22:16:03 -04:00
extents.c ext4: journal credit fix for the delayed allocation's writepages() function 2008-08-19 22:15:58 -04:00
file.c ext4: delayed allocation i_blocks fix for stat 2008-07-11 19:27:31 -04:00
fsync.c ext4: call blkdev_issue_flush on fsync 2008-07-11 19:27:31 -04:00
group.h ext4: Rename read_block_bitmap() to ext4_read_block_bitmap() 2008-07-11 19:27:31 -04:00
hash.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
ialloc.c ext4: Fix bug where we return ENOSPC even though we have plenty of inodes 2008-08-19 22:19:50 -04:00
inode.c ext4: journal credit fix for the delayed allocation's writepages() function 2008-08-19 22:15:58 -04:00
ioctl.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
Makefile ext4: Add multi block allocator for ext4 2008-01-29 00:19:52 -05:00
mballoc.c ext4: Don't allow lg prealloc list to be grow large. 2008-07-23 14:14:05 -04:00
mballoc.h ext4: Don't allow lg prealloc list to be grow large. 2008-07-23 14:14:05 -04:00
migrate.c ext4: journal credits reservation fixes for extent file writepage 2008-08-19 22:16:05 -04:00
namei.c ext4: cleanup never-used magic numbers from htree code 2008-07-11 19:27:31 -04:00
namei.h
resize.c ext4: don't try to resize if there are no reserved gdt blocks left 2008-08-19 22:13:41 -04:00
super.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 2008-08-03 10:50:44 -07:00
symlink.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
xattr_security.c ext4: move headers out of include/linux 2008-04-29 18:13:32 -04:00
xattr_trusted.c ext4: remove double definitions of xattr macros 2008-07-11 19:27:31 -04:00
xattr_user.c ext4: remove double definitions of xattr macros 2008-07-11 19:27:31 -04:00
xattr.c ext4: Cleanup whitespace and other miscellaneous style issues 2008-07-26 16:15:44 -04:00
xattr.h ext4: make ext4_xattr_list() static 2008-04-17 10:38:59 -04:00