kernel.git/fs/f2fs/super.c, branch linux-3.14.y

f2fs: clean checkpatch warnings

2014-01-20T01:27:12Z

Fixed a variety of trivial checkpatch warnings. The only delta should be some minor formatting on log strings that were split / too long. Signed-off-by: Chris Fries Signed-off-by: Jaegeuk Kim

f2fs: add a sysfs entry to control max_victim_search

2014-01-08T04:45:08Z

Previously during SSR and GC, the maximum number of retrials to find a victim segment was hard-coded by MAX_VICTIM_SEARCH, 4096 by default. This number makes an effect on IO locality, when SSR mode is activated, which results in performance fluctuation on some low-end devices. If max_victim_search = 4, the victim will be searched like below. ("D" represents a dirty segment, and "*" indicates a selected victim segment.) D1 D2 D3 D4 D5 D6 D7 D8 D9 [ * ] [ * ] [ * ] [ ....] This patch adds a sysfs entry to control the number dynamically through: /sys/fs/f2fs/$dev/max_victim_search Signed-off-by: Jaegeuk Kim

f2fs: introduce sysfs entry to control in-place-update policy

2013-12-23T01:18:07Z

This patch introduces new sysfs entries for users to control the policy of in-place-updates, namely IPU, in f2fs. Sometimes f2fs suffers from performance degradation due to its out-of-place update policy that produces many additional node block writes. If the storage performance is very dependant on the amount of data writes instead of IO patterns, we'd better drop this out-of-place update policy. This patch suggests 5 polcies and their triggering conditions as follows. [sysfs entry name = ipu_policy] 0: F2FS_IPU_FORCE all the time, 1: F2FS_IPU_SSR if SSR mode is activated, 2: F2FS_IPU_UTIL if FS utilization is over threashold, 3: F2FS_IPU_SSR_UTIL if SSR mode is activated and FS utilization is over threashold, 4: F2FS_IPU_DISABLE disable IPU. (=default option) [sysfs entry name = min_ipu_util] This parameter controls the threshold to trigger in-place-updates. The number indicates percentage of the filesystem utilization, and used by F2FS_IPU_UTIL and F2FS_IPU_SSR_UTIL policies. For more details, see need_inplace_update() in segment.h. Signed-off-by: Jaegeuk Kim

f2fs: missing kmem_cache_destroy for discard_entry

2013-12-23T01:18:07Z

insmod f2fs.ko is failed after insmod and rmmod firstly. $ sudo insmod fs/f2fs/f2fs.ko insmod: error inserting 'fs/f2fs/f2fs.ko': -1 Cannot allocate memory -- dmesg -- kmem_cache_sanity_check (free_nid): Cache name already exists. Signed-off-by: Changman Lee Signed-off-by: Jaegeuk Kim

f2fs: refactor bio->rw handling

2013-12-23T01:18:06Z

This patch introduces f2fs_io_info to mitigate the complex parameter list. struct f2fs_io_info { enum page_type type; /* contains DATA/NODE/META/META_FLUSH */ int rw; /* contains R/RS/W/WS */ int rw_flag; /* contains REQ_META/REQ_PRIO */ } 1. f2fs_write_data_pages - DATA - WRITE_SYNC is set when wbc->WB_SYNC_ALL. 2. sync_node_pages - NODE - WRITE_SYNC all the time 3. sync_meta_pages - META - WRITE_SYNC all the time - REQ_META | REQ_PRIO all the time ** f2fs_submit_merged_bio() handles META_FLUSH. 4. ra_nat_pages, ra_sit_pages, ra_sum_pages - META - READ_SYNC Cc: Fan Li Cc: Changman Lee Signed-off-by: Jaegeuk Kim

f2fs: add unlikely() macro for compiler more aggressively

2013-12-23T01:18:06Z

This patch adds unlikely() macro into the most of codes. The basic rule is to add that when: - checking unusual errors, - checking page mappings, - and the other unlikely conditions. Change log from v1: - Don't add unlikely for the NULL test and error test: advised by Andi Kleen. Cc: Chao Yu Cc: Andi Kleen Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: use inner macro GFP_F2FS_ZERO for simplification

2013-12-23T01:18:05Z

Use inner macro GFP_F2FS_ZERO to instead of GFP_NOFS | __GFP_ZERO for simplification of code. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: convert recover_orphan_inodes to void

2013-12-23T01:18:05Z

The recover_orphan_inodes() returns no error all the time, so we don't need to check its errors. Signed-off-by: Chao Yu [Jaegeuk Kim: add description] Signed-off-by: Jaegeuk Kim

f2fs: add a new mount option: inline_data

2013-12-23T01:18:03Z

Add a mount option: inline_data. If the mount option is set, data of New created small files can be stored in their inode. Signed-off-by: Huajun Li Signed-off-by: Haicheng Li Signed-off-by: Weihong Xu Signed-off-by: Jaegeuk Kim

f2fs: add a new function to support for merging contiguous read

2013-12-23T01:18:02Z

For better read performance, we add a new function to support for merging contiguous read as the one for write. v1-->v2: o add declarations here as Gu Zheng suggested. o use new structure f2fs_bio_info introduced by Jaegeuk Kim. Signed-off-by: Chao Yu Acked-by: Gu Zheng