BMC/Intel-BMC/linux.git/fs/f2fs/super.c, branch dev-4.4

f2fs: export ra_nid_pages to sysfs

2015-10-12T21:03:43+00:00

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

f2fs: introduce a periodic checkpoint flow

2015-10-09T23:20:57+00:00

This patch introduces a periodic checkpoint feature. Note that, this is not enforcing to conduct checkpoints very strictly in terms of trigger timing, instead just hope to help user experiences. The default value is 60 seconds. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: introduce background_gc=sync mount option

2015-10-09T23:20:57+00:00

This patch introduce background_gc=sync enabling synchronous cleaning in background. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: disallow switch extent_cache option dynamically

2015-10-09T23:20:53+00:00

Swith extent_cache option dynamically when remount may casue consistency issue between extent cache and dnode page. Fix in this patch to avoid that condition. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: upset segment_info repair

2015-09-01T21:45:27+00:00

upset segment_info like this: 276000|161 0|0 4|70 3|0 3|0 0|0 0|91 4|0 4|232 4|39 276104|0 4|0 4|1 4|0 4|0 4|280 4|0 4|42 4|262 4|38 276204|179 4|89 4|39 4|24 4|0 4|96 4|3 4|428 4|0 4|118 276304|112 4|97 4|0 4|0 4|0 4|68 4|0 4|0 4|86 4|138 276404|0 4|0 0|166 5|39 4|101 0|111 Signed-off-by: Yunlei He Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: do not write any node pages related to orphan inodes

2015-08-20T15:59:42+00:00

We should not write node pages when deleting orphan inodes. In order to do that, we can eaisly set POR_DOING flag earlier before entering orphan inode routine. Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: handle error of f2fs_iget correctly

2015-08-14T23:02:14+00:00

In recover_orphan_inode, whenever f2fs_iget fail, we will make kernel panic, but it's not reasonable, because f2fs_iget can fail due to a lot of reasons including out of memory. So we change error handling method as below: a) when finding no entry for the orphan inode, bug_on for catching bugs; b) for other reasons, report it to caller. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: remove inmem radix tree

2015-08-11T18:31:14+00:00

Previously, we use radix tree to index all registered page entries for atomic file, but now we only use radix tree to see whether current page is indexed or not, since the other user of radix tree is gone in commit 042b7816aaeb ("f2fs: remove unnecessary call to invalidate inmemory pages"). So in this patch, we try to use one more efficient way: Introducing a macro ATOMIC_WRITTEN_PAGE, and setting it as page private value to indicate page indexing status. By using this way, we can save memory and lookup time. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix double lock in handle_failed_inode

2015-08-05T15:08:09+00:00

In handle_failed_inode, there is a potential deadlock which can happen in below call path: - f2fs_create - f2fs_lock_op down_read(cp_rwsem) - f2fs_add_link - __f2fs_add_link - init_inode_metadata - f2fs_init_security failed - truncate_blocks failed - handle_failed_inode - f2fs_truncate - truncate_blocks(..,true) - write_checkpoint - block_operations - f2fs_lock_all down_write(cp_rwsem) - f2fs_lock_op down_read(cp_rwsem) So in this path, we pass parameter to f2fs_truncate to make sure cp_rwsem in truncate_blocks will not be locked again. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: use extent_cache by default

2015-08-04T21:09:56+00:00

We don't need to handle the duplicate extent information. The integrated rule is: - update on-disk extent with largest one tracked by in-memory extent_cache - destroy extent_tree for the truncation case - drop per-inode extent_cache by shrinker Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim