Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) What:		/sys/fs/f2fs/<disk>/gc_max_sleep_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) Date:		July 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) Description:	Controls the maximum sleep time for gc_thread. Time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 		is in milliseconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) What:		/sys/fs/f2fs/<disk>/gc_min_sleep_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) Date:		July 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) Description:	Controls the minimum sleep time for gc_thread. Time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 		is in milliseconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) What:		/sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) Date:		July 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) Description:	Controls the default sleep time for gc_thread. Time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 		is in milliseconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) What:		/sys/fs/f2fs/<disk>/gc_idle
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) Date:		July 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) Contact:	"Namjae Jeon" <namjae.jeon@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) Description:	Controls the victim selection policy for garbage collection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		Setting gc_idle = 0(default) will disable this option. Setting:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 		===========  ===============================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		gc_idle = 1  will select the Cost Benefit approach & setting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		gc_idle = 2  will select the greedy approach & setting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		gc_idle = 3  will select the age-threshold based approach.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		===========  ===============================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) What:		/sys/fs/f2fs/<disk>/reclaim_segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) Date:		October 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) Description:	This parameter controls the number of prefree segments to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 		reclaimed. If the number of prefree segments is larger than
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		the number of segments in the proportion to the percentage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 		over total volume size, f2fs tries to conduct checkpoint to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		reclaim the prefree segments to free segments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		By default, 5% over total # of segments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) What:		/sys/fs/f2fs/<disk>/main_blkaddr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) Date:		November 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) Contact:	"Ramon Pantin" <pantin@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		 Shows first block address of MAIN area.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) What:		/sys/fs/f2fs/<disk>/ipu_policy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) Date:		November 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) Description:	Controls the in-place-update policy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		updates in f2fs. User can set:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		====  =================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		0x01  F2FS_IPU_FORCE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		0x02  F2FS_IPU_SSR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 		0x04  F2FS_IPU_UTIL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		0x08  F2FS_IPU_SSR_UTIL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		0x10  F2FS_IPU_FSYNC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		0x20  F2FS_IPU_ASYNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		0x40  F2FS_IPU_NOCACHE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		====  =================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		Refer segment.h for details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) What:		/sys/fs/f2fs/<disk>/min_ipu_util
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) Date:		November 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) Description:	Controls the FS utilization condition for the in-place-update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		policies. It is used by F2FS_IPU_UTIL and F2FS_IPU_SSR_UTIL policies.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) What:		/sys/fs/f2fs/<disk>/min_fsync_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) Date:		September 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) Description:	Controls the dirty page count condition for the in-place-update
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		policies.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) What:		/sys/fs/f2fs/<disk>/min_seq_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) Date:		August 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) Description:	Controls the dirty page count condition for batched sequential
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		writes in writepages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) What:		/sys/fs/f2fs/<disk>/min_hot_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) Date:		March 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) Description:	Controls the dirty page count condition for redefining hot data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) What:		/sys/fs/f2fs/<disk>/min_ssr_sections
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) Date:		October 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) Description:	Controls the free section threshold to trigger SSR allocation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		If this is large, SSR mode will be enabled early.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) What:		/sys/fs/f2fs/<disk>/max_small_discards
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) Date:		November 2013
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) Description:	Controls the issue rate of discard commands that consist of small
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		blocks less than 2MB. The candidates to be discarded are cached until
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		checkpoint is triggered, and issued during the checkpoint.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		By default, it is disabled with 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) What:		/sys/fs/f2fs/<disk>/discard_granularity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) Date:		July 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Description:	Controls discard granularity of inner discard thread. Inner thread
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		will not issue discards with size that is smaller than granularity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		The unit size is one block(4KB), now only support configuring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		in range of [1, 512]. Default value is 4(=16KB).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) What:		/sys/fs/f2fs/<disk>/umount_discard_timeout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) Date:		January 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) Description:	Set timeout to issue discard commands during umount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	        Default: 5 secs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) What:		/sys/fs/f2fs/<disk>/pending_discard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) Date:		November 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) Description:	Shows the number of pending discard commands in the queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) What:		/sys/fs/f2fs/<disk>/max_victim_search
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) Date:		January 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) Description:	Controls the number of trials to find a victim segment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		when conducting SSR and cleaning operations. The default value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		is 4096 which covers 8GB block address range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) What:		/sys/fs/f2fs/<disk>/migration_granularity
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) Date:		October 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) Description:	Controls migration granularity of garbage collection on large
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		section, it can let GC move partial segment{s} of one section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		in one GC cycle, so that dispersing heavy overhead GC to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		multiple lightweight one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) What:		/sys/fs/f2fs/<disk>/dir_level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) Date:		March 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) Description:	Controls the directory level for large directory. If a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		directory has a number of files, it can reduce the file lookup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		latency by increasing this dir_level value. Otherwise, it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		needs to decrease this value to reduce the space overhead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		The default value is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) What:		/sys/fs/f2fs/<disk>/ram_thresh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) Date:		March 2014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) Contact:	"Jaegeuk Kim" <jaegeuk.kim@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) Description:	Controls the memory footprint used by free nids and cached
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		nat entries. By default, 1 is set, which indicates
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		10 MB / 1 GB RAM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) What:		/sys/fs/f2fs/<disk>/batched_trim_sections
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) Date:		February 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) Description:	Controls the trimming rate in batch mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		<deprecated>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) What:		/sys/fs/f2fs/<disk>/cp_interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) Date:		October 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) Description:	Controls the checkpoint timing, set to 60 seconds by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) What:		/sys/fs/f2fs/<disk>/idle_interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) Date:		January 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) Description:	Controls the idle timing of system, if there is no FS operation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		during given interval.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		Set to 5 seconds by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) What:		/sys/fs/f2fs/<disk>/discard_idle_interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) Date:		September 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) Contact:	"Sahitya Tummala" <stummala@codeaurora.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) Description:	Controls the idle timing of discard thread given
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		this time interval.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		Default is 5 secs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) What:		/sys/fs/f2fs/<disk>/gc_idle_interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) Date:		September 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) Contact:	"Sahitya Tummala" <stummala@codeaurora.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) Description:    Controls the idle timing for gc path. Set to 5 seconds by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) What:		/sys/fs/f2fs/<disk>/iostat_enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) Date:		August 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) Description:	Controls to enable/disable IO stat.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) What:		/sys/fs/f2fs/<disk>/ra_nid_pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) Date:		October 2015
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) Contact:	"Chao Yu" <chao2.yu@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) Description:	Controls the count of nid pages to be readaheaded.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		When building free nids, F2FS reads NAT blocks ahead for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		speed up. Default is 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) What:		/sys/fs/f2fs/<disk>/dirty_nats_ratio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) Date:		January 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) Contact:	"Chao Yu" <chao2.yu@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) Description:	Controls dirty nat entries ratio threshold, if current
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		ratio exceeds configured threshold, checkpoint will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		be triggered for flushing dirty nat entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) What:		/sys/fs/f2fs/<disk>/lifetime_write_kbytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) Date:		January 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) Contact:	"Shuoran Liu" <liushuoran@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) Description:	Shows total written kbytes issued to disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) What:		/sys/fs/f2fs/<disk>/features
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) Date:		July 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) Description:	<deprecated: should use /sys/fs/f2fs/<disk>/feature_list/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		Shows all enabled features in current device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		Supported features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		encryption, blkzoned, extra_attr, projquota, inode_checksum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		verity, sb_checksum, casefold, readonly, compression, pin_file.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) What:		/sys/fs/f2fs/<disk>/feature_list/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) Date:		June 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) Description:	Expand /sys/fs/f2fs/<disk>/features to meet sysfs rule.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		Supported on-disk features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		encryption, block_zoned (aka blkzoned), extra_attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		project_quota (aka projquota), inode_checksum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		flexible_inline_xattr, quota_ino, inode_crtime, lost_found,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		verity, sb_checksum, casefold, readonly, compression.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		Note that, pin_file is moved into /sys/fs/f2fs/features/.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) What:		/sys/fs/f2fs/features/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) Date:		July 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) Description:	Shows all enabled kernel features.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		Supported features:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		encryption, block_zoned, extra_attr, project_quota,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		inode_checksum, flexible_inline_xattr, quota_ino,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		inode_crtime, lost_found, verity, sb_checksum,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		casefold, readonly, compression, test_dummy_encryption_v2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		atomic_write, pin_file, encrypted_casefold.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) What:		/sys/fs/f2fs/<disk>/inject_rate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) Date:		May 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) Contact:	"Sheng Yong" <shengyong1@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) Description:	Controls the injection rate of arbitrary faults.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) What:		/sys/fs/f2fs/<disk>/inject_type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) Date:		May 2016
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) Contact:	"Sheng Yong" <shengyong1@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) Description:	Controls the injection type of arbitrary faults.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) What:		/sys/fs/f2fs/<disk>/dirty_segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) Date:		October 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) Description:	Shows the number of dirty segments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) What:		/sys/fs/f2fs/<disk>/reserved_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) Date:		June 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) Description:	Controls target reserved blocks in system, the threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		is soft, it could exceed current available user space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) What:		/sys/fs/f2fs/<disk>/current_reserved_blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) Date:		October 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) Contact:	"Yunlong Song" <yunlong.song@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) Description:	Shows current reserved blocks in system, it may be temporarily
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		smaller than target_reserved_blocks, but will gradually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		increase to target_reserved_blocks when more free blocks are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		freed by user later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) What:		/sys/fs/f2fs/<disk>/gc_urgent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) Date:		August 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) Description:	Do background GC agressively when set. When gc_urgent = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		background thread starts to do GC by given gc_urgent_sleep_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		interval. When gc_urgent = 2, F2FS will lower the bar of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		checking idle in order to process outstanding discard commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		and GC a little bit aggressively. It is set to 0 by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) What:		/sys/fs/f2fs/<disk>/gc_urgent_sleep_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) Date:		August 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) Description:	Controls sleep time of GC urgent mode. Set to 500ms by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) What:		/sys/fs/f2fs/<disk>/readdir_ra
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) Date:		November 2017
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) Contact:	"Sheng Yong" <shengyong1@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) Description:	Controls readahead inode block in readdir. Enabled by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) What:		/sys/fs/f2fs/<disk>/gc_pin_file_thresh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) Date:		January 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) Contact:	Jaegeuk Kim <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) Description:	This indicates how many GC can be failed for the pinned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		file. If it exceeds this, F2FS doesn't guarantee its pinning
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		state. 2048 trials is set by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) What:		/sys/fs/f2fs/<disk>/extension_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) Date:		Feburary 2018
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) Description:	Used to control configure extension list:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		- Query: cat /sys/fs/f2fs/<disk>/extension_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		- Add: echo '[h/c]extension' > /sys/fs/f2fs/<disk>/extension_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		- Del: echo '[h/c]!extension' > /sys/fs/f2fs/<disk>/extension_list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		- [h] means add/del hot file extension
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		- [c] means add/del cold file extension
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) What:		/sys/fs/f2fs/<disk>/unusable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) Date		April 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) Contact:	"Daniel Rosenberg" <drosen@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) Description:	If checkpoint=disable, it displays the number of blocks that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		are unusable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		If checkpoint=enable it displays the number of blocks that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		would be unusable if checkpoint=disable were to be set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) What:		/sys/fs/f2fs/<disk>/encoding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) Date		July 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) Contact:	"Daniel Rosenberg" <drosen@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) Description:	Displays name and version of the encoding set for the filesystem.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		If no encoding is set, displays (none)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) What:		/sys/fs/f2fs/<disk>/free_segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) Description:	Number of free segments in disk.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) What:		/sys/fs/f2fs/<disk>/cp_foreground_calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) Description:	Number of checkpoint operations performed on demand. Available when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) What:		/sys/fs/f2fs/<disk>/cp_background_calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) Description:	Number of checkpoint operations performed in the background to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		free segments. Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) What:		/sys/fs/f2fs/<disk>/gc_foreground_calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) Description:	Number of garbage collection operations performed on demand.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) What:		/sys/fs/f2fs/<disk>/gc_background_calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) Description:	Number of garbage collection operations triggered in background.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) What:		/sys/fs/f2fs/<disk>/moved_blocks_foreground
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) Description:	Number of blocks moved by garbage collection in foreground.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) What:		/sys/fs/f2fs/<disk>/moved_blocks_background
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) Description:	Number of blocks moved by garbage collection in background.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) What:		/sys/fs/f2fs/<disk>/avg_vblocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) Date:		September 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) Contact:	"Hridya Valsaraju" <hridya@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) Description:	Average number of valid blocks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		Available when CONFIG_F2FS_STAT_FS=y.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) What:		/sys/fs/f2fs/<disk>/mounted_time_sec
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) Date:		February 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) Description:	Show the mounted time in secs of this partition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) What:		/sys/fs/f2fs/<disk>/data_io_flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) Date:		April 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) Description:	Give a way to attach REQ_META|FUA to data writes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 		given temperature-based bits. Now the bits indicate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		+-------------------+-------------------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 		|      REQ_META     |      REQ_FUA      |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 		|    5 |    4 |   3 |    2 |    1 |   0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 		| Cold | Warm | Hot | Cold | Warm | Hot |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) What:		/sys/fs/f2fs/<disk>/node_io_flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) Date:		June 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) Description:	Give a way to attach REQ_META|FUA to node writes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		given temperature-based bits. Now the bits indicate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 		+-------------------+-------------------+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 		|      REQ_META     |      REQ_FUA      |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 		|    5 |    4 |   3 |    2 |    1 |   0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 		| Cold | Warm | Hot | Cold | Warm | Hot |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 		+------+------+-----+------+------+-----+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) What:		/sys/fs/f2fs/<disk>/iostat_period_ms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) Date:		April 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) Description:	Give a way to change iostat_period time. 3secs by default.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 		The new iostat trace gives stats gap given the period.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) What:		/sys/fs/f2fs/<disk>/max_io_bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) Date:		December 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) Description:	This gives a control to limit the bio size in f2fs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 		Default is zero, which will follow underlying block layer limit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 		whereas, if it has a certain bytes value, f2fs won't submit a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 		bio larger than that size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) What:		/sys/fs/f2fs/<disk>/stat/sb_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) Date:		December 2020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) Description:	Show status of f2fs superblock in real time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 		====== ===================== =================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 		value  sb status macro       description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		0x1    SBI_IS_DIRTY          dirty flag for checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 		0x2    SBI_IS_CLOSE          specify unmounting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 		0x4    SBI_NEED_FSCK         need fsck.f2fs to fix
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 		0x8    SBI_POR_DOING         recovery is doing or not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 		0x10   SBI_NEED_SB_WRITE     need to recover superblock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 		0x20   SBI_NEED_CP           need to checkpoint
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 		0x40   SBI_IS_SHUTDOWN       shutdown by ioctl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 		0x80   SBI_IS_RECOVERED      recovered orphan/data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 		0x100  SBI_CP_DISABLED       CP was disabled last mount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 		0x200  SBI_CP_DISABLED_QUICK CP was disabled quickly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 		0x400  SBI_QUOTA_NEED_FLUSH  need to flush quota info in CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 		0x800  SBI_QUOTA_SKIP_FLUSH  skip flushing quota in current CP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		0x1000 SBI_QUOTA_NEED_REPAIR quota file may be corrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		0x2000 SBI_IS_RESIZEFS       resizefs is in process
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		====== ===================== =================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) What:		/sys/fs/f2fs/<disk>/ckpt_thread_ioprio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) Date:		January 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) Description:	Give a way to change checkpoint merge daemon's io priority.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 		Its default value is "be,3", which means "BE" I/O class and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 		I/O priority "3". We can select the class between "rt" and "be",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 		and set the I/O priority within valid range of it. "," delimiter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 		is necessary in between I/O class and priority number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) What:		/sys/fs/f2fs/<disk>/ovp_segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) Date:		March 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) Contact:	"Jaegeuk Kim" <jaegeuk@kernel.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) Description:	Shows the number of overprovision segments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) What:		/sys/fs/f2fs/<disk>/compr_written_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) Date:		March 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) Description:	Show the block count written after compression since mount. Note
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		that when the compressed blocks are deleted, this count doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 		decrease. If you write "0" here, you can initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 		compr_written_block and compr_saved_block to "0".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) What:		/sys/fs/f2fs/<disk>/compr_saved_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) Date:		March 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) Description:	Show the saved block count with compression since mount. Note
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 		that when the compressed blocks are deleted, this count doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 		decrease. If you write "0" here, you can initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 		compr_written_block and compr_saved_block to "0".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) What:		/sys/fs/f2fs/<disk>/compr_new_inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) Date:		March 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) Description:	Show the count of inode newly enabled for compression since mount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 		Note that when the compression is disabled for the files, this count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 		doesn't decrease. If you write "0" here, you can initialize
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 		compr_new_inode to "0".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) What:		/sys/fs/f2fs/<disk>/atgc_candidate_ratio
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) Date:		May 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) Description:	When ATGC is on, it controls candidate ratio in order to limit total
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 		number of potential victim in all candidates, the value should be in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 		range of [0, 100], by default it was initialized as 20(%).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) What:		/sys/fs/f2fs/<disk>/atgc_candidate_count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) Date:		May 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) Description:	When ATGC is on, it controls candidate count in order to limit total
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 		number of potential victim in all candidates, by default it was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 		initialized as 10 (sections).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) What:		/sys/fs/f2fs/<disk>/atgc_age_weight
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) Date:		May 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) Description:	When ATGC is on, it controls age weight to balance weight proportion
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 		in between aging and valid blocks, the value should be in range of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 		[0, 100], by default it was initialized as 60(%).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) What:		/sys/fs/f2fs/<disk>/atgc_age_threshold
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) Date:		May 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) Contact:	"Chao Yu" <yuchao0@huawei.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) Description:	When ATGC is on, it controls age threshold to bypass GCing young
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 		candidates whose age is not beyond the threshold, by default it was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 		initialized as 604800 seconds (equals to 7 days).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) What:		/sys/fs/f2fs/<disk>/gc_reclaimed_segments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) Date:		July 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) Description:	Show how many segments have been reclaimed by GC during a specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 		GC mode (0: GC normal, 1: GC idle CB, 2: GC idle greedy,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 		3: GC idle AT, 4: GC urgent high, 5: GC urgent low)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 		You can re-initialize this value to "0".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) What:		/sys/fs/f2fs/<disk>/gc_segment_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) Date:		July 2021
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) Contact:	"Daeho Jeong" <daehojeong@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) Description:	You can control for which gc mode the "gc_reclaimed_segments" node shows.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) 		Refer to the description of the modes in "gc_reclaimed_segments".