linux-stable.git/fs/f2fs/debug.c, branch v4.3

f2fs: adjust showing of extent cache stat

2015-08-22T05:45:16+00:00

This patch alters to replace total hit stat with rbtree hit stat,
and then adjust showing of extent cache stat:

Hit Count:
L1-1: for largest node hit count;
L1-2: for last cached node hit count;
L2: for extent node hit after lookuping in rbtree.

Hit Ratio:
ratio (hit count / total lookup count)

Inner Struct Count:
tree count, node count.

Before:
Extent Hit Ratio: 0 / 2

Extent Tree Count: 3

Extent Node Count: 2

Patched:
Exten Cacache:
  - Hit Count: L1-1:4871 L1-2:2074 L2:208
  - Hit Ratio: 1% (7153 / 550751)
  - Inner Struct Count: tree: 26560, node: 11824

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

f2fs: add largest/cached stat in extent cache

2015-08-22T05:45:15+00:00

This patch adds to stat the hit count of largest/cached node for showing
in debugfs.

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

f2fs: use atomic_t to record hit ratio info of extent cache

2015-08-05T15:08:06+00:00

Variables for recording extent cache ratio info were updated without
protection, this patch tries to alter them to atomic_t type for more
accurate stat.

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

f2fs: stat inline xattr inode number

2015-08-05T15:08:05+00:00

This patch adds to stat the number of inline xattr inode for
showing in debugfs.

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

f2fs: fix building on 32-bit architectures

2015-06-01T23:20:53+00:00

A bug fix to the debug output extended the type of some local
variables to 64-bit, which now causes the kernel to fail building
because of missing 64-bit division functions:

ERROR: "__aeabi_uldivmod" [fs/f2fs/f2fs.ko] undefined!

In the kernel, we have to use div_u64 or do_div to do this,
in order to annotate that this is an expensive operation.

As the function is only called for debug out, we know this
is not performance critical, so it is safe to use div_u64.

Signed-off-by: Arnd Bergmann 
Fixes: d1f85bd38db19 ("f2fs: avoid value overflow in showing current status")
Signed-off-by: Jaegeuk Kim

f2fs: avoid value overflow in showing current status

2015-05-28T22:41:44+00:00

This patch fixes overflow when do cat /sys/kernel/debug/f2fs/status.
If a section is relatively large, dist value can be overflowed.

Reported-by: Yossi Goldfill 
Signed-off-by: Jaegeuk Kim

f2fs: introduce discard_map for f2fs_trim_fs

2015-05-28T22:41:39+00:00

This patch adds a bitmap for discard issues from f2fs_trim_fs.
There-in rule is to issue discard commands only for invalidated blocks
after mount.
Once mount is done, f2fs_trim_fs trims out whole invalid area.
After ehn, it will not issue and discrads redundantly.

Signed-off-by: Jaegeuk Kim

f2fs: add stat info for moved blocks by background gc

2015-04-10T22:08:32+00:00

This patch is for looking into gc performance of f2fs in detail.

Signed-off-by: Changman Lee 
[Jaegeuk Kim: fix build errors]
Signed-off-by: Jaegeuk Kim

f2fs: show extent tree, node stat info in debugfs

2015-03-03T17:58:47+00:00

This patch add and show stat info of total memory footprint for extent tree,node
in debugfs.

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

f2fs: avoid variable length array

2015-02-12T01:04:50+00:00

Instead of using variable length array, this patch let preallocate memory for
them.

Signed-off-by: Jaegeuk Kim