user/sven/linux.git/fs/f2fs/node.h, branch v4.4.294

f2fs: use crc and cp version to determine roll-forward recovery

2019-01-26T08:42:46Z

commit a468f0ef516fda9c7d91bb550d458e853d76955e upstream. Previously, we used cp_version only to detect recoverable dnodes. In order to avoid same garbage cp_version, we needed to truncate the next dnode during checkpoint, resulting in additional discard or data write. If we can distinguish this by using crc in addition to cp_version, we can remove this overhead. There is backward compatibility concern where it changes node_footer layout. So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to detect new layout. New layout will be activated only when this flag is set. Signed-off-by: Jaegeuk Kim [bwh: Backported to 4.4: - Deleted code is slightly different - Adjust context] Signed-off-by: Ben Hutchings Signed-off-by: Greg Kroah-Hartman

f2fs: export ra_nid_pages to sysfs

2015-10-12T21:03:43Z

After finishing building free nid cache, we will try to readahead asynchronously 4 more pages for the next reloading, the count of readahead nid pages is fixed. In some case, like SMR drive, read less sectors with fixed count each time we trigger RA may be low efficient, since we will face high seeking overhead, so we'd better let user to configure this parameter from sysfs in specific workload. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

Revert "f2fs: do not skip dentry block writes"

2015-10-12T20:38:02Z

The periodic checkpoint can resolve the previous issue. So, now we can use this again to improve the reported performance regression: https://lkml.org/lkml/2015/10/8/20 This reverts commit 15bec0ff5a9ba6d203178fa8772259df6207942a.

f2fs: do not skip dentry block writes

2015-10-09T23:20:54Z

Previously, we skip dentry block writes when wbc is SYNC_NONE with no memory pressure and the number of dirty pages is pretty small. But, we didn't skip for normal data writes, which gives us not much big impact on overall performance. Moreover, by skipping some data writes, kworker falls into infinite loop to try to write blocks, when many dir inodes have only one dentry block. So, this patch removes skipping data writes. Signed-off-by: Jaegeuk Kim

f2fs: move existing definitions into f2fs.h

2015-05-28T22:41:27Z

This patch moves some inode-related definitions from node.h to f2fs.h to add new features. Signed-off-by: Jaegeuk Kim

f2fs: introduce infra macro and data structure of rb-tree extent cache

2015-03-03T17:58:46Z

Introduce infra macro and data structure for rb-tree based extent cache: Macros: * EXT_TREE_VEC_SIZE: indicate vector size for gang lookup in extent tree. * F2FS_MIN_EXTENT_LEN: indicate minimum length of extent managed in cache. * EXTENT_CACHE_SHRINK_NUMBER: indicate number of extent in cache will be shrunk. Basic data structures for extent cache: * struct extent_tree: extent tree entry per inode. * struct extent_node: extent info node linked in extent tree. Besides, adding new extent cache related fields in f2fs_sb_info. Signed-off-by: Chao Yu Signed-off-by: Changman Lee Signed-off-by: Jaegeuk Kim

f2fs: free radix_tree_nodes used by nat_set entries

2015-01-10T01:02:28Z

In the normal case, the radix_tree_nodes are freed successfully. But, when cp_error was detected, we should destroy them forcefully. Signed-off-by: Jaegeuk Kim

f2fs: fix missing cold bit during recovery

2015-01-10T01:02:25Z

In do_recover_data, we find and update previous node pages after updating its new block addresses. After then, we call fill_node_footer without reset field, we erase its cold bit so that this new cold node block is written to wrong log area. This patch fixes not to miss its old flag. Signed-off-by: Jaegeuk Kim

f2fs: merge two uchar variable in struct node_info to reduce memory cost

2015-01-10T01:02:23Z

This patch moves one member of struct nat_entry: _flag_ to struct node_info, so _version_ in struct node_info and _flag_ which are unsigned char type will merge to one 32-bit space in register/memory. So the size of nat_entry will be reduced from 28 bytes to 24 bytes (for 64-bit machine, reduce its size from 40 bytes to 32 bytes) and then slab memory using by f2fs will be reduced. changes from v2: o update description of memory usage gain for 64-bit machine suggested by Changman Lee. changes from v1: o introduce inline copy_node_info() to copy valid data from node info suggested by Jaegeuk Kim, it can avoid bug. Reviewed-by: Changman Lee Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: change atomic and volatile write policies

2015-01-10T01:02:22Z

This patch adds two new ioctls to release inmemory pages grabbed by atomic writes. o f2fs_ioc_abort_volatile_write - If transaction was failed, all the grabbed pages and data should be written. o f2fs_ioc_release_volatile_write - This is to enhance the performance of PERSIST mode in sqlite. In order to avoid huge memory consumption which causes OOM, this patch changes volatile writes to use normal dirty pages, instead blocked flushing to the disk as long as system does not suffer from memory pressure. Signed-off-by: Jaegeuk Kim