linux.git/fs/f2fs/segment.c, branch v3.13

f2fs: issue more large discard command

2013-11-11T00:36:32+00:00

o Changes from v1
  Use find_next(_zero)_bit suggested by jg.kim

When f2fs issues discard command, if segment is contiguous,
let's issue more large segment to gather adjacent segments.

** blktrace **
179,1    0     5859    42.619023770   971  C   D 131072 + 2097152 [0]
179,1    0    33665   108.840475468   971  C   D 2228224 + 2494464 [0]
179,1    0    33671   109.131616427   971  C   D 14909440 + 344064 [0]
179,1    0    33677   109.137100677   971  C   D 15261696 + 4096 [0]

Signed-off-by: Changman Lee 
Signed-off-by: Jaegeuk Kim

f2fs: cleanup waiting routine for writeback pages in cp

2013-11-08T05:10:29+00:00

use genernal method supported by kernel

 o changes from v1
   If any waiter exists at end io, wake up it.

Signed-off-by: Changman Lee 
Signed-off-by: Jaegeuk Kim

f2fs: avoid to use a NULL point in destroy_segment_manager

2013-11-06T07:37:44+00:00

A NULL point should avoid to be used in destroy_segment_manager after allocating
memory fail for f2fs_sm_info.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: change the method of calculating the number summary blocks

2013-10-30T03:17:58+00:00

npages_for_summary_flush uses (SUMMARY_SIZE + 1) as the size of a f2fs_summary
while its actual size is  SUMMARY_SIZE. So the result sometimes is bigger than
actual number by one, which causes checkpoint can't be written into disk
contiguously, and sometimes summary blocks can't be compacted like they should.
Besides, when writing summary blocks into pages, if remain space in a page
isn't big enough for one f2fs_summary, it will be left unused, current code
seems not to take it into account.

Signed-off-by: Fan Li 
Signed-off-by: Jaegeuk Kim

f2fs: add an option to avoid unnecessary BUG_ONs

2013-10-29T06:44:38+00:00

If you want to remove unnecessary BUG_ONs, you can just turn off F2FS_CHECK_FS
in your kernel config.

Signed-off-by: Jaegeuk Kim

f2fs: remove unnecessary segment bitmap updates

2013-10-28T04:38:16+00:00

Only one dirty type is set in __locate_dirty_segment and we can know
dirty type of segment. So we don't need to check other dirty types.

Signed-off-by: Changman Lee 
Signed-off-by: Jaegeuk Kim

f2fs: remove redundant set_page_dirty from write_compacted_summaries

2013-10-25T07:54:39+00:00

Previously, set_page_dirty is called every time after writting one summary info
into compacted summary page,
To avoid redundant set_page_dirty, we only call set_page_dirty before release
page.

Signed-off-by: Yu Chao 
Signed-off-by: Jaegeuk Kim

f2fs: introduce f2fs_balance_fs_bg for some background jobs

2013-10-25T07:54:38+00:00

This patch merges some background jobs into this new function.

Signed-off-by: Changman Lee 
Signed-off-by: Jaegeuk Kim

f2fs: reclaim prefree segments periodically

2013-10-25T07:54:37+00:00

Previously, f2fs postpones reclaiming prefree segments into free segments
as much as possible.
However, if user writes and deletes a bunch of data without any sync or fsync
calls, some flash storages can suffer from garbage collections.

So, this patch adds the reclaiming codes to f2fs_write_node_pages and background
GC thread.

If there are a lot of prefree segments, let's do checkpoint so that f2fs
submits discard commands for the prefree regions to the flash storage.

Signed-off-by: Changman Lee 
Signed-off-by: Jaegeuk Kim

f2fs: clean up several status-related operations

2013-10-25T07:54:08+00:00

This patch cleans up improper definitions that update some status information.

Signed-off-by: Jaegeuk Kim