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9 good amounts of memory savings. Some of the usecases include /tmp storage,
17 Following shows a typical sequence of steps for using zram.
24 2) Set max number of compression streams
41 the value of max_comp_streams because single stream compression backend
73 There is little point creating a zram of greater than twice the size of memory
74 since we expect a 2:1 compression ratio. Note that zram uses about 0.1% of the
75 size of the disk when not in use so a huge zram is wasteful.
103 A brief description of exported device attritbutes. For more details please
109 initstate         RO    shows the initialization state of the device
111 num_reads         RO    the number of reads
112 failed_reads      RO    the number of failed reads
113 num_write         RO    the number of writes
114 failed_writes     RO    the number of failed writes
115 invalid_io        RO    the number of non-page-size-aligned I/O requests
116 max_comp_streams  RW    the number of possible concurrent compress operations
118 notify_free       RO    the number of notifications to free pages (either
120 zero_pages        RO    the number of zero filled pages written to this disk
121 orig_data_size    RO    uncompressed size of data stored in this disk
122 compr_data_size   RO    compressed size of data stored in this disk
123 mem_used_total    RO    the amount of memory allocated for this disk
126 mem_limit         RW    the maximum amount of memory ZRAM can use to store
128 num_migrated      RO    the number of objects migrated migrated by compaction
138 The list of deprecated attributes can be found here:
142 (e.g. num_reads) *AND* is accessible via one of the stat files (zram<id>/stat
155 layer and, thus, not available in zram<id>/stat file. It consists of a
156 single line of text and contains the following stats separated by
165 The stat file represents device's mm statistics. It consists of a single
166 line of text and contains the following stats separated by whitespace: