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378b8e1ad1
kernel-ark/fs/udf
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Namjae Jeon 378b8e1ad1 udf: add writepages support for udf 
Use mpage_writepages() instead of multiple calls to udf_writepage()
to make performance higher.

*Write Speed with writepage() =
 RecSize     ReadSpeed    WriteSpeed  RanReadSpeed RanWriteSpeed
10485760    0.00MB/sec    8.56MB/sec    0.00MB/sec    8.20MB/sec
 1048576    0.00MB/sec    8.57MB/sec    0.00MB/sec    6.42MB/sec
  524288    0.00MB/sec    8.59MB/sec    0.00MB/sec    5.24MB/sec
  262144    0.00MB/sec    8.59MB/sec    0.00MB/sec    4.17MB/sec
  131072    0.00MB/sec    8.53MB/sec    0.00MB/sec    3.32MB/sec
   65536    0.00MB/sec    8.49MB/sec    0.00MB/sec    2.31MB/sec

*Write Speed with writepages()
RecSize     ReadSpeed    WriteSpeed  RanReadSpeed RanWriteSpeed
10485760    0.00MB/sec    9.88MB/sec    0.00MB/sec    9.60MB/sec
 1048576    0.00MB/sec    9.95MB/sec    0.00MB/sec    7.52MB/sec
  524288    0.00MB/sec    9.98MB/sec    0.00MB/sec    6.16MB/sec
  262144    0.00MB/sec    9.90MB/sec    0.00MB/sec    4.98MB/sec
  131072    0.00MB/sec    9.89MB/sec    0.00MB/sec    3.78MB/sec
   65536    0.00MB/sec    9.81MB/sec    0.00MB/sec    2.50MB/sec

There is about 1.4MB/sec speed improvement over 8.5MB/sec,
which comes out around 16% improvement.

Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Ashish Sangwan <ashish.sangwan2@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2012-09-04 00:06:26 +02:00
..
balloc.c udf: Fix handling of i_blocks 2012-02-29 21:53:47 +01:00
dir.c udf: Remove unnecessary bkl usages 2011-01-06 17:03:57 +01:00
directory.c udf: Neaten udf_debug uses 2011-10-31 23:43:58 +01:00
ecma_167.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
file.c udf: remove the second argument of k[un]map_atomic() 2012-03-20 21:48:26 +08:00
ialloc.c udf: Init/maintain file entry checkpoint field 2012-02-29 21:53:46 +01:00
inode.c udf: add writepages support for udf 2012-09-04 00:06:26 +02:00
Kconfig Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6 2011-01-11 14:45:52 -08:00
lowlevel.c udf: Neaten udf_debug uses 2011-10-31 23:43:58 +01:00
Makefile switch udf to simple_fsync() 2009-06-11 21:36:13 -04:00
misc.c udf: Rename udf_error to udf_err 2011-10-10 19:29:01 +02:00
namei.c Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs 2012-07-24 17:40:44 -07:00
osta_udf.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
partition.c udf: Cleanup metadata flags handling 2011-10-31 23:49:48 +01:00
super.c udf: fix retun value on error path in udf_load_logicalvol 2012-08-15 14:23:23 +02:00
symlink.c udf: Treat symlink component of type 2 as / 2012-01-09 13:52:08 +01:00
truncate.c udf: Do not decrement i_blocks when freeing indirect extent block 2012-07-09 13:24:21 +02:00
udf_i.h udf: Init/maintain file entry checkpoint field 2012-02-29 21:53:46 +01:00
udf_sb.h udf: propagate umode_t 2012-01-03 22:55:08 -05:00
udfdecl.h udf: stop using s_dirt 2012-07-09 12:03:11 +02:00
udfend.h Remove struct typedefs from fs/udf/ecma_167.h et al. 2009-04-02 12:29:47 +02:00
udftime.c udf: Convert printks to pr_<level> 2011-10-31 23:43:52 +01:00
unicode.c udf: Convert printks to pr_<level> 2011-10-31 23:43:52 +01:00