What: /sys/block/zram/disksize Date: August 2010 Contact: Nitin Gupta Description: The disksize file is read-write and specifies the disk size which represents the limit on the *uncompressed* worth of data that can be stored in this disk. Unit: bytes What: /sys/block/zram/initstate Date: August 2010 Contact: Nitin Gupta Description: The initstate file is read-only and shows the initialization state of the device. What: /sys/block/zram/reset Date: August 2010 Contact: Nitin Gupta Description: The reset file is write-only and allows resetting the device. The reset operation frees all the memory associated with this device. What: /sys/block/zram/num_reads Date: August 2010 Contact: Nitin Gupta Description: The num_reads file is read-only and specifies the number of reads (failed or successful) done on this device. What: /sys/block/zram/num_writes Date: August 2010 Contact: Nitin Gupta Description: The num_writes file is read-only and specifies the number of writes (failed or successful) done on this device. What: /sys/block/zram/invalid_io Date: August 2010 Contact: Nitin Gupta Description: The invalid_io file is read-only and specifies the number of non-page-size-aligned I/O requests issued to this device. What: /sys/block/zram/failed_reads Date: February 2014 Contact: Sergey Senozhatsky Description: The failed_reads file is read-only and specifies the number of failed reads happened on this device. What: /sys/block/zram/failed_writes Date: February 2014 Contact: Sergey Senozhatsky Description: The failed_writes file is read-only and specifies the number of failed writes happened on this device. What: /sys/block/zram/notify_free Date: August 2010 Contact: Nitin Gupta Description: The notify_free file is read-only and specifies the number of swap slot free notifications received by this device. These notifications are sent to a swap block device when a swap slot is freed. This statistic is applicable only when this disk is being used as a swap disk. What: /sys/block/zram/zero_pages Date: August 2010 Contact: Nitin Gupta Description: The zero_pages file is read-only and specifies number of zero filled pages written to this disk. No memory is allocated for such pages. What: /sys/block/zram/orig_data_size Date: August 2010 Contact: Nitin Gupta Description: The orig_data_size file is read-only and specifies uncompressed size of data stored in this disk. This excludes zero-filled pages (zero_pages) since no memory is allocated for them. Unit: bytes What: /sys/block/zram/compr_data_size Date: August 2010 Contact: Nitin Gupta Description: The compr_data_size file is read-only and specifies compressed size of data stored in this disk. So, compression ratio can be calculated using orig_data_size and this statistic. Unit: bytes What: /sys/block/zram/mem_used_total Date: August 2010 Contact: Nitin Gupta Description: The mem_used_total file is read-only and specifies the amount of memory, including allocator fragmentation and metadata overhead, allocated for this disk. So, allocator space efficiency can be calculated using compr_data_size and this statistic. Unit: bytes