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android_kernel_oneplus_msm8998/Documentation/ABI/testing/sysfs-fs-f2fs
Jaegeuk Kim 56ee1e8179 f2fs: updates on v4.16-rc1 
Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've followed up to support some generic features such
  as cgroup, block reservation, linking fscrypt_ops, delivering
  write_hints, and some ioctls. And, we could fix some corner cases in
  terms of power-cut recovery and subtle deadlocks.

  Enhancements:
   - bitmap operations to handle NAT blocks
   - readahead to improve readdir speed
   - switch to use fscrypt_*
   - apply write hints for direct IO
   - add reserve_root=%u,resuid=%u,resgid=%u to reserve blocks for root/uid/gid
   - modify b_avail and b_free to consider root reserved blocks
   - support cgroup writeback
   - support FIEMAP_FLAG_XATTR for fibmap
   - add F2FS_IOC_PRECACHE_EXTENTS to pre-cache extents
   - add F2FS_IOC_{GET/SET}_PIN_FILE to pin LBAs for data blocks
   - support inode creation time

  Bug fixs:
   - sysfile-based quota operations
   - memory footprint accounting
   - allow to write data on partial preallocation case
   - fix deadlock case on fallocate
   - fix to handle fill_super errors
   - fix missing inode updates of fsync'ed file
   - recover renamed file which was fsycn'ed before
   - drop inmemory pages in corner error case
   - keep last_disk_size correctly
   - recover missing i_inline flags during roll-forward

  Various clean-up patches were added as well"

Cherry-pick from origin/upstream-f2fs-stable-linux-4.4.y:

5f9b3abb91 f2fs: support inode creation time
9fb0de1751 f2fs: rebuild sit page from sit info in mem
1062a0c018 f2fs: stop issuing discard if fs is readonly
fa043fae90 f2fs: clean up duplicated assignment in init_discard_policy
b007190234 f2fs: use GFP_F2FS_ZERO for cleanup
35b11839a1 f2fs: allow to recover node blocks given updated checkpoint
e56500860b f2fs: recover some i_inline flags
64aa9569a1 f2fs: correct removexattr behavior for null valued extended attribute
70b3a923da f2fs: drop page cache after fs shutdown
8069a0e983 f2fs: stop gc/discard thread after fs shutdown
bb924f7777 f2fs: hanlde error case in f2fs_ioc_shutdown
700b53f21e f2fs: split need_inplace_update
f31d52811c f2fs: fix to update last_disk_size correctly
eeb0118b83 f2fs: kill F2FS_INLINE_XATTR_ADDRS for cleanup
c1b74c9670 f2fs: clean up error path of fill_super
d5efd57e01 f2fs: avoid hungtask when GC encrypted block if io_bits is set
c4027d0843 f2fs: allow quota to use reserved blocks
18d267c273 f2fs: fix to drop all inmem pages correctly
4dca47531e f2fs: speed up defragment on sparse file
999f806a7c f2fs: support F2FS_IOC_PRECACHE_EXTENTS
84960fca96 f2fs: add an ioctl to disable GC for specific file
292c8e1cfd f2fs: prevent newly created inode from being dirtied incorrectly
58b1f5b0fc f2fs: support FIEMAP_FLAG_XATTR
6afa9a94d0 f2fs: fix to cover f2fs_inline_data_fiemap with inode_lock
10f4a4140b f2fs: check node page again in write end io
b203c58dfd f2fs: fix to caclulate required free section correctly
d49132d45c f2fs: handle newly created page when revoking inmem pages
2ce6b9d816 f2fs: add resgid and resuid to reserve root blocks
f53dcf6799 f2fs: implement cgroup writeback support
1338f376d5 f2fs: remove unused pend_list_tag
d4f19f6266 f2fs: avoid high cpu usage in discard thread
b78e9302e2 f2fs: make local functions static
62438ba87b f2fs: add reserved blocks for root user
06a366757f f2fs: check segment type in __f2fs_replace_block
4c6bc4be37 f2fs: update inode info to inode page for new file
591b336387 f2fs: show precise # of blocks that user/root can use
b242d7edc5 f2fs: clean up unneeded declaration
87b8168e9e f2fs: continue to do direct IO if we only preallocate partial blocks
2b4d859bd9 f2fs: enable quota at remount from r to w
54bf13a0ad f2fs: skip stop_checkpoint for user data writes
25ef3006ba f2fs: fix missing error number for xattr operation
cff2c7fe41 f2fs: recover directory operations by fsync
e2bb618a0a f2fs: return error during fill_super
8a2c11d865 f2fs: fix an error case of missing update inode page
cd38d5ada5 f2fs: fix potential hangtask in f2fs_trace_pid
e81cafbeba f2fs: no need return value in restore summary process
04d44000d6 f2fs: use unlikely for release case
925d0933d8 f2fs: don't return value in truncate_data_blocks_range
f7986c416d f2fs: clean up f2fs_map_blocks
e4f5e26cda f2fs: clean up hash codes
1f994d4708 f2fs: fix error handling in fill_super
e7db649b5f f2fs: spread f2fs_k{m,z}alloc
5d4e487b99 f2fs: inject fault to kvmalloc
8b33886c37 f2fs: inject fault to kzalloc
d946807987 f2fs: remove a redundant conditional expression
3bc01114a3 f2fs: apply write hints to select the type of segment for direct write
c80f019591 f2fs: switch to fscrypt_prepare_setattr()
bb8b850365 f2fs: switch to fscrypt_prepare_lookup()
9ab470eaf8 f2fs: switch to fscrypt_prepare_rename()
aeaac517a1 f2fs: switch to fscrypt_prepare_link()
101c6a96ad f2fs: switch to fscrypt_file_open()
6d025237a1 f2fs: remove repeated f2fs_bug_on
b01e03d724 f2fs: remove an excess variable
e1f9be2f7c f2fs: fix lock dependency in between dio_rwsem & i_mmap_sem
e5c7c86010 f2fs: remove unused parameter
f130dbb98a f2fs: still write data if preallocate only partial blocks
47ee9b2598 f2fs: introduce sysfs readdir_ra to readahead inode block in readdir
55e2f89181 f2fs: fix concurrent problem for updating free bitmap
e1398f6554 f2fs: remove unneeded memory footprint accounting
2d69561135 f2fs: no need to read nat block if nat_block_bitmap is set
4dd2d07338 f2fs: reserve nid resource for quota sysfile

Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
2018-02-22 19:19:42 +00:00

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What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the maximun sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the minimum sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the default sleep time for gc_thread. Time
is in milliseconds.
What: /sys/fs/f2fs/<disk>/gc_idle
Date: July 2013
Contact: "Namjae Jeon" <namjae.jeon@samsung.com>
Description:
Controls the victim selection policy for garbage collection.
What: /sys/fs/f2fs/<disk>/reclaim_segments
Date: October 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of segment discard commands.
What: /sys/fs/f2fs/<disk>/ipu_policy
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the in-place-update policy.
What: /sys/fs/f2fs/<disk>/min_ipu_util
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the FS utilization condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/min_fsync_blocks
Date: September 2014
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the dirty page count condition for the in-place-update
policies.
What: /sys/fs/f2fs/<disk>/min_hot_blocks
Date: March 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the dirty page count condition for redefining hot data.
What: /sys/fs/f2fs/<disk>/min_ssr_sections
Date: October 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls the fee section threshold to trigger SSR allocation.
What: /sys/fs/f2fs/<disk>/max_small_discards
Date: November 2013
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the issue rate of small discard commands.
What: /sys/fs/f2fs/<disk>/discard_granularity
Date: July 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls discard granularity of inner discard thread, inner thread
will not issue discards with size that is smaller than granularity.
The unit size is one block, now only support configuring in range
of [1, 512].
What: /sys/fs/f2fs/<disk>/max_victim_search
Date: January 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the number of trials to find a victim segment.
What: /sys/fs/f2fs/<disk>/dir_level
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the directory level for large directory.
What: /sys/fs/f2fs/<disk>/ram_thresh
Date: March 2014
Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com>
Description:
Controls the memory footprint used by f2fs.
What: /sys/fs/f2fs/<disk>/trim_sections
Date: February 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the trimming rate in batch mode.
What: /sys/fs/f2fs/<disk>/cp_interval
Date: October 2015
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the checkpoint timing.
What: /sys/fs/f2fs/<disk>/idle_interval
Date: January 2016
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls the idle timing.
What: /sys/fs/f2fs/<disk>/iostat_enable
Date: August 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls to enable/disable IO stat.
What: /sys/fs/f2fs/<disk>/ra_nid_pages
Date: October 2015
Contact: "Chao Yu" <chao2.yu@samsung.com>
Description:
Controls the count of nid pages to be readaheaded.
What: /sys/fs/f2fs/<disk>/dirty_nats_ratio
Date: January 2016
Contact: "Chao Yu" <chao2.yu@samsung.com>
Description:
Controls dirty nat entries ratio threshold, if current
ratio exceeds configured threshold, checkpoint will
be triggered for flushing dirty nat entries.
What: /sys/fs/f2fs/<disk>/lifetime_write_kbytes
Date: January 2016
Contact: "Shuoran Liu" <liushuoran@huawei.com>
Description:
Shows total written kbytes issued to disk.
What: /sys/fs/f2fs/<disk>/feature
Date: July 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Shows all enabled features in current device.
What: /sys/fs/f2fs/<disk>/inject_rate
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection rate.
What: /sys/fs/f2fs/<disk>/inject_type
Date: May 2016
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls the injection type.
What: /sys/fs/f2fs/<disk>/reserved_blocks
Date: June 2017
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Controls target reserved blocks in system, the threshold
is soft, it could exceed current available user space.
What: /sys/fs/f2fs/<disk>/current_reserved_blocks
Date: October 2017
Contact: "Yunlong Song" <yunlong.song@huawei.com>
Contact: "Chao Yu" <yuchao0@huawei.com>
Description:
Shows current reserved blocks in system, it may be temporarily
smaller than target_reserved_blocks, but will gradually
increase to target_reserved_blocks when more free blocks are
freed by user later.
What: /sys/fs/f2fs/<disk>/gc_urgent
Date: August 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Do background GC agressively
What: /sys/fs/f2fs/<disk>/gc_urgent_sleep_time
Date: August 2017
Contact: "Jaegeuk Kim" <jaegeuk@kernel.org>
Description:
Controls sleep time of GC urgent mode
What: /sys/fs/f2fs/<disk>/readdir_ra
Date: November 2017
Contact: "Sheng Yong" <shengyong1@huawei.com>
Description:
Controls readahead inode block in readdir.
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