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2015-08-21f2fs: adjust showing of extent cache statChao Yu1-6/+12
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 <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-08-21f2fs: add largest/cached stat in extent cacheChao Yu1-2/+7
This patch adds to stat the hit count of largest/cached node for showing in debugfs. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-08-05f2fs: use atomic_t to record hit ratio info of extent cacheChao Yu1-2/+5
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 <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-08-05f2fs: stat inline xattr inode numberChao Yu1-0/+4
This patch adds to stat the number of inline xattr inode for showing in debugfs. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-06-01f2fs: fix building on 32-bit architecturesArnd Bergmann1-3/+3
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 <[email protected]> Fixes: d1f85bd38db19 ("f2fs: avoid value overflow in showing current status") Signed-off-by: Jaegeuk Kim <[email protected]>
2015-05-28f2fs: avoid value overflow in showing current statusJaegeuk Kim1-1/+2
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 <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-05-28f2fs: introduce discard_map for f2fs_trim_fsJaegeuk Kim1-1/+1
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 <[email protected]>
2015-04-10f2fs: add stat info for moved blocks by background gcChangman Lee1-5/+10
This patch is for looking into gc performance of f2fs in detail. Signed-off-by: Changman Lee <[email protected]> [Jaegeuk Kim: fix build errors] Signed-off-by: Jaegeuk Kim <[email protected]>
2015-03-03f2fs: show extent tree, node stat info in debugfsChao Yu1-0/+7
This patch add and show stat info of total memory footprint for extent tree,node in debugfs. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-02-11f2fs: avoid variable length arrayJaegeuk Kim1-0/+1
Instead of using variable length array, this patch let preallocate memory for them. Signed-off-by: Jaegeuk Kim <[email protected]>
2015-02-11f2fs: show the number of writeback pages in statJaegeuk Kim1-2/+3
This patch adds the # of writeback pages in stat info. Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-02-11f2fs: update memory footprint informationJaegeuk Kim1-7/+17
This patch adds missing memory usages, and splits them in detail. Signed-off-by: Jaegeuk Kim <[email protected]>
2015-02-11f2fs: fix wrong memory footprint statistics in debugfsChao Yu1-4/+11
Our value of memory footprint statistics showed in debugfs is not calculated correctly. Fix it in this patch. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-01-09f2fs: add nat/sit entries into statusJaegeuk Kim1-3/+5
This patch adds NAT/SIT entry informations. Signed-off-by: Jaegeuk Kim <[email protected]>
2015-01-09f2fs: reuse inode_entry_slab in gc procedure for using slab more effectivelyChao Yu1-1/+1
There are two slab cache inode_entry_slab and winode_slab using the same structure as below: struct dir_inode_entry { struct list_head list; /* list head */ struct inode *inode; /* vfs inode pointer */ }; struct inode_entry { struct list_head list; struct inode *inode; }; It's a little waste that the two cache can not share their memory space for each other. So in this patch we remove one redundant winode_slab slab cache, then use more universal name struct inode_entry as remaining data structure name of slab, finally we reuse the inode_entry_slab to store dirty dir item and gc item for more effective. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2015-01-09f2fs: add block count by in-place-update in stat infoChangman Lee1-0/+4
This patch adds block count by in-place-update in stat. Signed-off-by: Changman Lee <[email protected]> Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-12-08f2fs: use atomic for counting inode with inline_{dir,inode} flagChao Yu1-2/+5
As inline_{dir,inode} stat is increased/decreased concurrently by multi threads, so the value is not so accurate, let's use atomic type for counting accurately. Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-12-08f2fs: count the number of inmemory pagesJaegeuk Kim1-0/+3
This patch adds counting # of inmemory pages in the page cache. Signed-off-by: Jaegeuk Kim <[email protected]>
2014-11-19f2fs: introduce struct inode_management to wrap inner fieldsChao Yu1-1/+1
Now in f2fs, we have three inode cache: ORPHAN_INO, APPEND_INO, UPDATE_INO, and we manage fields related to inode cache separately in struct f2fs_sb_info for each inode cache type. This makes codes a bit messy, so that this patch intorduce a new struct inode_management to wrap inner fields as following which make codes more neat. /* for inner inode cache management */ struct inode_management { struct radix_tree_root ino_root; /* ino entry array */ spinlock_t ino_lock; /* for ino entry lock */ struct list_head ino_list; /* inode list head */ unsigned long ino_num; /* number of entries */ }; struct f2fs_sb_info { ... struct inode_management im[MAX_INO_ENTRY]; /* manage inode cache */ ... } Signed-off-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-11-06f2fs: introduce the number of inode entriesJaegeuk Kim1-1/+3
This patch adds to monitor the number of ino entries. Signed-off-by: Jaegeuk Kim <[email protected]>
2014-11-03f2fs: add stat info for inline_dentry inodesJaegeuk Kim1-0/+3
This patch adds status information for inline_dentry inodes. Signed-off-by: Jaegeuk Kim <[email protected]>
2014-09-30f2fs: check the use of macros on block counts and addressesJaegeuk Kim1-10/+10
This patch cleans up the existing and new macros for readability. Rule is like this. ,-----------------------------------------> MAX_BLKADDR -, | ,------------- TOTAL_BLKS ----------------------------, | | | | ,- seg0_blkaddr ,----- sit/nat/ssa/main blkaddress | block | | (SEG0_BLKADDR) | | | | (e.g., MAIN_BLKADDR) | address 0..x................ a b c d ............................. | | global seg# 0...................... m ............................. | | | | `------- MAIN_SEGS -----------' `-------------- TOTAL_SEGS ---------------------------' | | seg# 0..........xx.................. = Note = o GET_SEGNO_FROM_SEG0 : blk address -> global segno o GET_SEGNO : blk address -> segno o START_BLOCK : segno -> starting block address Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-08-19f2fs: fix typoarter971-2/+2
Fix typo and some grammatical errors. The words "filesystem" and "readahead" are being used without the space treewide. Signed-off-by: Park Ju Hyung <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-07-29f2fs: add infra for ino managementJaegeuk Kim1-1/+1
This patch changes the naming of orphan-related data structures to use as inode numbers managed globally. Later, we can use this facility for managing any inode number lists. Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-07-11f2fs: cleanup the needless return of f2fs_create_root_statsGu Zheng1-12/+5
Signed-off-by: Gu Zheng <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-03-20f2fs: remove unnecessary thresholdJaegeuk Kim1-4/+4
The NM_WOUT_THRESHOLD is now obsolete since f2fs starts to control on a basis of the memory footprint. Signed-off-by: Jaegeuk Kim <[email protected]>
2014-02-24f2fs: implement a lock-free stat_showJaegeuk Kim1-3/+0
The stat_show is just to show the current status of f2fs. So, we can remove all the there-in locks. Signed-off-by: Jaegeuk Kim <[email protected]>
2014-02-17f2fs: show counts of checkpoint in statusChangman Lee1-0/+1
This patch shows the counts of checkpoint in f2fs' status. Signed-off-by: Changman Lee <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-01-22f2fs: introduce NODE_MAPPING for code consistencyJaegeuk Kim1-2/+2
This patch adds NODE_MAPPING which is similar as META_MAPPING introduced by Gu Zheng. Cc: Gu Zheng <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-01-22f2fs: add help function META_MAPPINGGu Zheng1-2/+2
Introduce help function META_MAPPING() to get the cache meta blocks' address space. Signed-off-by: Gu Zheng <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-01-20f2fs: clean checkpatch warningsChris Fries1-1/+1
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 <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-01-14f2fs: add delimiter to seperate name and value in debug phraseChangman Lee1-4/+4
Support for f2fs-tools/tools/f2stat to monitor /sys/kernel/debug/f2fs/status Signed-off-by: Changman Lee <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2014-01-06f2fs: add the number of inline_data files to status infoJaegeuk Kim1-0/+3
This patch adds the number of inline_data files into the status information. Note that the number is reset whenever the filesystem is newly mounted. Signed-off-by: Jaegeuk Kim <[email protected]>
2013-12-23f2fs: replace the debugfs_root with f2fs_debugfs_rootYounger Liu1-9/+9
This minor change for the naming conventions of debugfs_root to avoid any possible conflicts to the other filesystem. Signed-off-by: Younger Liu <[email protected]> Cc: Younger Liu <[email protected]> Cc: Jaegeuk Kim <[email protected]> [Jaegeuk Kim: change the patch name] Signed-off-by: Jaegeuk Kim <[email protected]>
2013-12-23f2fs: remove debufs dir if debugfs_create_file() failedYounger Liu1-3/+21
When debugfs_create_file() failed in f2fs_create_root_stats(), debugfs_root should be remove. Signed-off-by: Younger Liu <[email protected]> Cc: Younger Liu <[email protected]> Cc: Jaegeuk Kim <[email protected]> Reviewed-by: Chao Yu <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-07-30f2fs: use seq_puts()/seq_putc() rather than seq_printf() where possibleGu Zheng1-9/+9
For string without format specifiers, using seq_puts()/seq_putc() instead of seq_printf(). Signed-off-by: Gu Zheng <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-07-30f2fs: add a help func F2FS_STAT() to get the f2fs_stat_infoGu Zheng1-8/+8
Add a help func F2FS_STAT() to get the f2fs_stat_info. Signed-off-by: Gu Zheng <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-05-28f2fs: use list_for_each_entry rather than list_for_each_entry_safemajianpeng1-2/+2
We can do this, since now we use a global mutex, f2fs_stat_mutex to protect its list operations. Signed-off-by: Jianpeng Ma <[email protected]> [Jaegeuk Kim: add description] Signed-off-by: Jaegeuk Kim <[email protected]>
2013-04-30f2fs: remove useless #include <linux/proc_fs.h> as we're now using sysfs as ↵Haicheng Li1-1/+0
debug entry. Signed-off-by: Haicheng Li <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-04-03f2fs: change GC bitmaps to apply the section granularityJaegeuk Kim1-1/+1
This patch removes a bitmap for victim segments selected by foreground GC, and modifies the other bitmap for victim segments selected by background GC. 1) foreground GC bitmap : We don't need to manage this, since we just only one previous victim section number instead of the whole victim history. The f2fs uses the victim section number in order not to allocate currently GC'ed section to current active logs. 2) background GC bitmap : This bitmap is used to avoid selecting victims repeatedly by background GCs. In addition, the victims are able to be selected by foreground GCs, since there is no need to read victim blocks during foreground GCs. By the fact that the foreground GC reclaims segments in a section unit, it'd be better to manage this bitmap based on the section granularity. Reviewed-by: Namjae Jeon <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-04-03f2fs: introduce TOTAL_SECS macroJaegeuk Kim1-4/+3
Let's use a macro to get the total number of sections. Reviewed-by: Namjae Jeon <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-02-12f2fs: add device name in debugfsmajianpeng1-1/+3
In file status, it can't distinguish between different devices. So add device name to do this function. Signed-off-by: Jianpeng Ma <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-01-15f2fs: fix the debugfs entry creation pathNamjae Jeon1-17/+10
As the "status" debugfs entry will be maintained for entire F2FS filesystem irrespective of the number of partitions. So, we can move the initialization to the init part of the f2fs and destroy will be done from exit part. After making changes, for individual partition mount - entry creation code will not be executed. Signed-off-by: Jianpeng Ma <[email protected]> Signed-off-by: Namjae Jeon <[email protected]> Signed-off-by: Amit Sahrawat <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2013-01-15f2fs: add global mutex_lock to protect f2fs_stat_listmajianpeng1-12/+11
There is an race condition between umounting f2fs and reading f2fs/status, which results in oops. Fox example: Thread A Thread B umount f2fs cat f2fs/status f2fs_destroy_stats() { stat_show() { list_for_each_entry_safe(&f2fs_stat_list) list_del(&si->stat_list); mutex_lock(&si->stat_lock); si->sbi = NULL; mutex_unlock(&si->stat_lock); kfree(sbi->stat_info); } mutex_lock(&si->stat_lock) <- si is gone. ... } Solution with a global lock: f2fs_stat_mutex: Thread A Thread B umount f2fs cat f2fs/status f2fs_destroy_stats() { stat_show() { mutex_lock(&f2fs_stat_mutex); list_del(&si->stat_list); mutex_unlock(&f2fs_stat_mutex); kfree(sbi->stat_info); mutex_lock(&f2fs_stat_mutex); } list_for_each_entry_safe(&f2fs_stat_list) ... mutex_unlock(&f2fs_stat_mutex); } Signed-off-by: Jianpeng Ma <[email protected]> [[email protected]: fix typos, description, and remove the existing lock] Signed-off-by: Jaegeuk Kim <[email protected]>
2013-01-04f2fs: update f2fs partition info about SIT/NAT layoutHuajun Li1-2/+2
Update partition info output under debug FS to reflect segment layout correctly. Signed-off-by: Huajun Li <[email protected]> Signed-off-by: Jaegeuk Kim <[email protected]>
2012-12-11f2fs: adjust kernel coding styleJaegeuk Kim1-3/+3
As pointed out by Randy Dunlap, this patch removes all usage of "/**" for comment blocks. Instead, just use "/*". Signed-off-by: Jaegeuk Kim <[email protected]>
2012-12-11f2fs: fix endian conversion bugs reported by sparseJaegeuk Kim1-1/+1
This patch should resolve the bugs reported by the sparse tool. Initial reports were written by "kbuild test robot" managed by fengguang.wu. In my local machines, I've tested also by running: > make C=2 CF="-D__CHECK_ENDIAN__" Accordingly, I've found lots of warnings and bugs related to the endian conversion. And I've fixed all at this moment. Signed-off-by: Jaegeuk Kim <[email protected]>
2012-12-11f2fs: move proc files to debugfsGreg Kroah-Hartman1-0/+361
This moves all of the f2fs debugging files into debugfs. The files are located in /sys/kernel/debug/f2fs/ Note, I think we are generating all of the same information in each of the files for every unique f2fs filesystem in the machine. This copies the functionality that was present in the proc files, but this should be fixed up in the future. Signed-off-by: Greg Kroah-Hartman <[email protected]> [[email protected]: merged 3 debugfs entries into a *status* entry] Signed-off-by: Jaegeuk Kim <[email protected]>
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