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Linux/Documentation/ABI/testing/sysfs-block-zram

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Diff markup

Differences between /Documentation/ABI/testing/sysfs-block-zram (Version linux-6.12-rc7) and /Documentation/ABI/testing/sysfs-block-zram (Version linux-2.6.0)


  1 What:           /sys/block/zram<id>/disksize      
  2 Date:           August 2010                       
  3 Contact:        Nitin Gupta <ngupta@vflare.org>    
  4 Description:                                      
  5                 The disksize file is read-writ    
  6                 which represents the limit on     
  7                 that can be stored in this dis    
  8                 Unit: bytes                       
  9                                                   
 10 What:           /sys/block/zram<id>/initstate     
 11 Date:           August 2010                       
 12 Contact:        Nitin Gupta <ngupta@vflare.org>    
 13 Description:                                      
 14                 The initstate file is read-onl    
 15                 state of the device.              
 16                                                   
 17 What:           /sys/block/zram<id>/reset         
 18 Date:           August 2010                       
 19 Contact:        Nitin Gupta <ngupta@vflare.org>    
 20 Description:                                      
 21                 The reset file is write-only a    
 22                 device. The reset operation fr    
 23                 with this device.                 
 24                                                   
 25 What:           /sys/block/zram<id>/max_comp_s    
 26 Date:           February 2014                     
 27 Contact:        Sergey Senozhatsky <sergey.seno    
 28 Description:                                      
 29                 The max_comp_streams file is r    
 30                 number of backend's zcomp_strm    
 31                 concurrent compress operations    
 32                                                   
 33 What:           /sys/block/zram<id>/comp_algor    
 34 Date:           February 2014                     
 35 Contact:        Sergey Senozhatsky <sergey.seno    
 36 Description:                                      
 37                 The comp_algorithm file is rea    
 38                 available and selected compres    
 39                 compression algorithm selectio    
 40                                                   
 41 What:           /sys/block/zram<id>/mem_used_m    
 42 Date:           August 2014                       
 43 Contact:        Minchan Kim <minchan@kernel.org    
 44 Description:                                      
 45                 The mem_used_max file is write    
 46                 the counter of maximum memory     
 47                 compressed data. For resetting    
 48                 "0". Otherwise, you could see     
 49                 Unit: bytes                       
 50                                                   
 51 What:           /sys/block/zram<id>/mem_limit     
 52 Date:           August 2014                       
 53 Contact:        Minchan Kim <minchan@kernel.org    
 54 Description:                                      
 55                 The mem_limit file is write-on    
 56                 amount of memory ZRAM can use     
 57                 The limit could be changed in     
 58                 the limit. No limit is the ini    
 59                                                   
 60 What:           /sys/block/zram<id>/compact       
 61 Date:           August 2015                       
 62 Contact:        Minchan Kim <minchan@kernel.org    
 63 Description:                                      
 64                 The compact file is write-only    
 65                 allocator zrm uses. The alloca    
 66                 it could free fragment space.     
 67                                                   
 68 What:           /sys/block/zram<id>/io_stat       
 69 Date:           August 2015                       
 70 Contact:        Sergey Senozhatsky <sergey.seno    
 71 Description:                                      
 72                 The io_stat file is read-only     
 73                 statistics not accounted by bl    
 74                 failed_reads, failed_writes, e    
 75                 block layer statistics file fo    
 76                                                   
 77 What:           /sys/block/zram<id>/mm_stat       
 78 Date:           August 2015                       
 79 Contact:        Sergey Senozhatsky <sergey.seno    
 80 Description:                                      
 81                 The mm_stat file is read-only     
 82                 statistics (orig_data_size, co    
 83                 similar to block layer statist    
 84                                                   
 85 What:           /sys/block/zram<id>/debug_stat    
 86 Date:           July 2016                         
 87 Contact:        Sergey Senozhatsky <sergey.seno    
 88 Description:                                      
 89                 The debug_stat file is read-on    
 90                 device's debugging info useful    
 91                 format is not documented inten    
 92                 anytime without any notice.       
 93                                                   
 94 What:           /sys/block/zram<id>/backing_de    
 95 Date:           June 2017                         
 96 Contact:        Minchan Kim <minchan@kernel.org    
 97 Description:                                      
 98                 The backing_dev file is read-w    
 99                 device for zram to write incom    
100                 For using, user should enable     
101                                                   
102 What:           /sys/block/zram<id>/idle          
103 Date:           November 2018                     
104 Contact:        Minchan Kim <minchan@kernel.org    
105 Description:                                      
106                 idle file is write-only and ma    
107                 If system has mounted debugfs,    
108                 are idle via /sys/kernel/debug    
109                                                   
110 What:           /sys/block/zram<id>/writeback     
111 Date:           November 2018                     
112 Contact:        Minchan Kim <minchan@kernel.org    
113 Description:                                      
114                 The writeback file is write-on    
115                 huge page writeback to backing    
116                                                   
117 What:           /sys/block/zram<id>/bd_stat       
118 Date:           November 2018                     
119 Contact:        Minchan Kim <minchan@kernel.org    
120 Description:                                      
121                 The bd_stat file is read-only     
122                 statistics (bd_count, bd_reads    
123                 similar to block layer statist    
124                                                   
125 What:           /sys/block/zram<id>/writeback_    
126 Date:           November 2018                     
127 Contact:        Minchan Kim <minchan@kernel.org    
128 Description:                                      
129                 The writeback_limit_enable fil    
130                 eanbe of writeback_limit featu    
131                 No limit "0" is the initial st    
132                                                   
133 What:           /sys/block/zram<id>/writeback_    
134 Date:           November 2018                     
135 Contact:        Minchan Kim <minchan@kernel.org    
136 Description:                                      
137                 The writeback_limit file is re    
138                 amount of writeback ZRAM can d    
139                 in run time.                      
140                                                   
141 What:           /sys/block/zram<id>/recomp_alg    
142 Date:           November 2022                     
143 Contact:        Sergey Senozhatsky <senozhatsky    
144 Description:                                      
145                 The recomp_algorithm file is r    
146                 or show secondary compression     
147                                                   
148 What:           /sys/block/zram<id>/recompress    
149 Date:           November 2022                     
150 Contact:        Sergey Senozhatsky <senozhatsky    
151 Description:                                      
152                 The recompress file is write-o    
153                 with secondary compression alg    
154                                                   
155 What:           /sys/block/zram<id>/algorithm_    
156 Date:           August 2024                       
157 Contact:        Sergey Senozhatsky <senozhatsky    
158 Description:                                      
159                 The algorithm_params file is w    
160                 compression algorithm paramete    
                                                      

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