linux/fs/f2fs
Chao Yu 46008c6d42 f2fs: support in batch multi blocks preallocation
This patch introduces reserve_new_blocks to make preallocation of multi
blocks as in batch operation, so it can avoid lots of redundant
operation, result in better performance.

In virtual machine, with rotational device:

time fallocate -l 32G /mnt/f2fs/file

Before:
real	0m4.584s
user	0m0.000s
sys	0m4.580s

After:
real	0m0.292s
user	0m0.000s
sys	0m0.272s

In x86, with SSD:

time fallocate -l 500G $MNT/testfile

Before : 24.758 s
After  :  1.604 s

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: fix bugs and add performance numbers measured in x86.]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2016-05-11 09:56:35 -07:00
..
acl.c f2fs: introduce f2fs_kmalloc to wrap kmalloc 2016-05-07 10:32:20 -07:00
acl.h f2fs: avoid deadlock on init_inode_metadata 2014-11-03 16:07:33 -08:00
checkpoint.c f2fs: fix inode cache leak 2016-05-07 10:44:54 -07:00
data.c f2fs: support in batch multi blocks preallocation 2016-05-11 09:56:35 -07:00
debug.c f2fs: show current mount status 2016-04-15 08:49:47 -07:00
dir.c f2fs: revisit error handling flows 2016-05-07 10:32:25 -07:00
extent_cache.c f2fs: reuse get_extent_info 2016-05-07 10:32:29 -07:00
f2fs.h f2fs: support in batch multi blocks preallocation 2016-05-11 09:56:35 -07:00
file.c f2fs: make atomic/volatile operation exclusive 2016-05-11 09:56:34 -07:00
gc.c f2fs: introduce f2fs_kmalloc to wrap kmalloc 2016-05-07 10:32:20 -07:00
gc.h f2fs: detect idle time depending on user behavior 2016-01-11 15:56:37 -08:00
hash.c f2fs: introduce dot and dotdot name check 2015-05-28 15:41:34 -07:00
inline.c f2fs: use f2fs_grab_cache_page instead of grab_cache_page 2016-05-07 10:32:21 -07:00
inode.c f2fs: don't worry about inode leak in evict_inode 2016-05-07 10:32:30 -07:00
Kconfig f2fs: add mount option to select fault injection ratio 2016-05-07 10:32:22 -07:00
Makefile fs crypto: move per-file encryption from f2fs tree to fs/crypto 2016-03-17 21:19:33 -07:00
namei.c Merge tag 'f2fs-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs 2016-04-04 13:00:39 -07:00
node.c f2fs: read node blocks ahead when truncating blocks 2016-05-07 10:44:56 -07:00
node.h f2fs: use wait_for_stable_page to avoid contention 2016-02-22 16:07:23 -08:00
recovery.c f2fs: fix inode cache leak 2016-05-07 10:44:54 -07:00
segment.c f2fs: fix to clear page private flag 2016-05-03 11:20:06 -07:00
segment.h f2fs: shrink size of struct seg_entry 2016-05-07 10:32:29 -07:00
shrinker.c f2fs: speed up shrinking extent tree entries 2015-12-30 10:13:00 -08:00
super.c fscrypto/f2fs: allow fs-specific key prefix for fs encryption 2016-05-07 10:32:33 -07:00
trace.c f2fs: trace old block address for CoWed page 2016-02-22 21:40:02 -08:00
trace.h f2fs: add sbi and page pointer in f2fs_io_info 2015-05-28 15:41:32 -07:00
xattr.c f2fs: remove unneeded memset when updating xattr 2016-05-07 10:32:28 -07:00
xattr.h f2fs: add missing argument to f2fs_setxattr stub 2016-03-17 21:19:47 -07:00