diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-block-zram')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-block-zram | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-block-zram b/Documentation/ABI/testing/sysfs-block-zram new file mode 100644 index 00000000000..70ec992514d --- /dev/null +++ b/Documentation/ABI/testing/sysfs-block-zram @@ -0,0 +1,121 @@ +What: /sys/block/zram<id>/disksize +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/initstate +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +Description: + The initstate file is read-only and shows the initialization + state of the device. + +What: /sys/block/zram<id>/reset +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/num_reads +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/num_writes +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/invalid_io +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/failed_reads +Date: February 2014 +Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> +Description: + The failed_reads file is read-only and specifies the number of + failed reads happened on this device. + +What: /sys/block/zram<id>/failed_writes +Date: February 2014 +Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> +Description: + The failed_writes file is read-only and specifies the number of + failed writes happened on this device. + +What: /sys/block/zram<id>/max_comp_streams +Date: February 2014 +Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> +Description: + The max_comp_streams file is read-write and specifies the + number of backend's zcomp_strm compression streams (number of + concurrent compress operations). + +What: /sys/block/zram<id>/comp_algorithm +Date: February 2014 +Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> +Description: + The comp_algorithm file is read-write and lets to show + available and selected compression algorithms, change + compression algorithm selection. + +What: /sys/block/zram<id>/notify_free +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/zero_pages +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/orig_data_size +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/compr_data_size +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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<id>/mem_used_total +Date: August 2010 +Contact: Nitin Gupta <ngupta@vflare.org> +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 |