linux.git/fs/f2fs/node.h, branch v3.15

f2fs: skip unnecessary node writes during fsync

2014-03-20T13:10:11+00:00

If multiple redundant fsync calls are triggered, we don't need to write its
node pages with fsync mark continuously.

So, this patch adds FI_NEED_FSYNC to track whether the latest node block is
written with the fsync mark or not.
If the mark was set, a new fsync doesn't need to write a node block.
Otherwise, we should do a new node block with the mark for roll-forward
recovery.

Signed-off-by: Jaegeuk Kim

f2fs: remove unnecessary threshold

2014-03-20T13:10:09+00:00

The NM_WOUT_THRESHOLD is now obsolete since f2fs starts to control on a basis
of the memory footprint.

Signed-off-by: Jaegeuk Kim

f2fs: throttle the memory footprint with a sysfs entry

2014-03-20T13:10:09+00:00

This patch introduces ram_thresh, a sysfs entry, which controls the memory
footprint used by the free nid list and the nat cache.

Previously, the free nid list was controlled by MAX_FREE_NIDS, while the nat
cache was managed by NM_WOUT_THRESHOLD.
However, this approach cannot be applied dynamically according to the system.

So, this patch adds ram_thresh that users can specify the threshold, which is
in order of 1 / 1024.
For example, if the total ram size is 4GB and the value is set to 10 by default,
f2fs tries to control the number of free nids and nat caches not to consume over
10 * (4GB / 1024) = 10MB.

Signed-off-by: Jaegeuk Kim

f2fs: introduce f2fs_has_xattr_block for better readability

2014-03-18T00:29:46+00:00

This patch introduces a help function f2fs_has_xattr_block for better
readability.

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

f2fs: fix to mark the checkpointed nat entry correctly

2014-02-24T07:00:40+00:00

The nat cache entry maintains a status whether it is checkpointed or not.
So, if a new cache entry is loaded from the last checkpoint,
nat_entry->checkpointed should be true.
If the cache entry is modified as being dirty, nat_entry->checkpoint should
be false.

Signed-off-by: Jaegeuk Kim

f2fs: update several comments

2013-12-23T01:26:03+00:00

Update several comments:
1. use f2fs_{un}lock_op install of mutex_{un}lock_op.
2. update comment of get_data_block().
3. update description of node offset.

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

f2fs: fix the use of XATTR_NODE_OFFSET

2013-08-09T05:57:56+00:00

This patch fixes the use of XATTR_NODE_OFFSET.

o The offset should not use several MSB bits which are used by marking node
blocks.

o IS_DNODE should handle XATTR_NODE_OFFSET to avoid potential abnormality
during the fsync call.

Signed-off-by: Jaegeuk Kim

f2fs: introduce help function F2FS_NODE()

2013-07-30T06:17:02+00:00

Introduce help function F2FS_NODE() to simplify the conversion of node_page to
f2fs_node.

Signed-off-by: Gu Zheng 
Signed-off-by: Jaegeuk Kim

f2fs: recover wrong pino after checkpoint during fsync

2013-06-14T00:04:45+00:00

If a file is linked, f2fs loose its parent inode number so that fsync calls
for the linked file should do checkpoint all the time.
But, if we can recover its parent inode number after the checkpoint, we can
adjust roll-forward mechanism for the further fsync calls, which is able to
improve the fsync performance significatly.

Signed-off-by: Jaegeuk Kim

f2fs: optimize several routines in node.h

2013-05-28T06:03:05+00:00

There are various functions with common code which could be separated
out to make common routines. So, made new routines and in order to
retain the same call path and no major changes, written some macros
to access those routines.

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