linux-stable.git/fs/f2fs/node.c, branch v3.9

f2fs: avoid build warning

2013-02-11T22:28:55+00:00

This patch removes the following build warning:
fs/f2fs/node.c: warning: 'nofs' may be used uninitialized in this function
[-Wuninitialized]:  => 738:8

Note that this is a false alarm.

Signed-off-by: Jaegeuk Kim

Merge branch 'f2fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into dev

2013-02-11T22:17:20+00:00

Pull f2fs cleanup patches from Al Viro:

f2fs: get rid of fake on-stack dentries
f2fs: switch init_inode_metadata() to passing parent and name separately
f2fs: switch new_inode_page() from dentry to qstr
f2fs: init_dent_inode() should take qstr

Signed-off-by: Jaegeuk Kim 

Conflicts:
	fs/f2fs/recovery.c

f2fs: clarify and enhance the f2fs_gc flow

2013-02-11T22:15:02+00:00

This patch makes clearer the ambiguous f2fs_gc flow as follows.

1. Remove intermediate checkpoint condition during f2fs_gc
 (i.e., should_do_checkpoint() and GC_BLOCKED)

2. Remove unnecessary return values of f2fs_gc because of #1.
 (i.e., GC_NODE, GC_OK, etc)

3. Simplify write_checkpoint() because of #2.

4. Clarify the main f2fs_gc flow.
 o monitor how many freed sections during one iteration of do_garbage_collect().
 o do GC more without checkpoints if we can't get enough free sections.
 o do checkpoint once we've got enough free sections through forground GCs.

5. Adopt thread-logging (Slack-Space-Recycle) scheme more aggressively on data
  log types. See. get_ssr_segement()

Signed-off-by: Jaegeuk Kim

f2fs: remove the use of page_cache_release

2013-02-11T22:15:01+00:00

Let's remove the use of page_cache_release() in f2fs, and instead, use
f2fs_put_page(page, 0) which is exactly same but for code readability.

Signed-off-by: Jaegeuk Kim

f2fs: reorganize code for ra_node_page

2013-02-11T22:15:01+00:00

We can remove unneeded label unlock_out, avoid unnecessary jump
and reorganize the returning conditions in this function.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Signed-off-by: Jaegeuk Kim

f2fs: switch new_inode_page() from dentry to qstr

2013-02-08T07:55:03+00:00

Signed-off-by: Al Viro

f2fs: init_dent_inode() should take qstr

2013-02-08T07:55:03+00:00

for one thing, it doesn't (and shouldn't) use anything else from dentry;
for another, on some call chains the dentry is fake and should
be eliminated completely.

Signed-off-by: Al Viro

f2fs: avoid issuing small bios due to several dirty node pages

2013-01-22T01:48:59+00:00

If some small bios of dirty node pages are supposed to be issued during the
sequential data writes, there-in well-produced consecutive data bios are able
to be split by the small node bios, resulting in performance degradation.
So, let's collect a number of dirty node pages until reaching a threshold.
And, by default, I set the threshold as 2MB, a segment size.

This improves sequential write performance on i5, 512GB SSD (830 w/ SATA2) as
follows.
Before: 231 MB/s -> After: 255 MB/s

Signed-off-by: Jaegeuk Kim 
Reviewed-by: Namjae Jeon

f2fs: add __init to functions in init_f2fs_fs

2013-01-22T01:48:38+00:00

Add __init to functions in init_f2fs_fs for code consistency.

Signed-off-by: Namjae Jeon 
Signed-off-by: Amit Sahrawat 
Signed-off-by: Jaegeuk Kim

f2fs: clean up unused variables and return values

2012-12-28T02:27:52+00:00

This patch cleans up a couple of unnecessary codes related to unused variables
and return values.

Signed-off-by: Jaegeuk Kim