Import Upstream version 4.11.6
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| What: /sys/block/zram<id>/num_reads | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The num_reads file is read-only and specifies the number of | ||
| reads (failed or successful) done on this device. | ||
| Now accessible via zram<id>/stat node. | ||
| What: /sys/block/zram<id>/num_writes | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The num_writes file is read-only and specifies the number of | ||
| writes (failed or successful) done on this device. | ||
| Now accessible via zram<id>/stat node. | ||
| What: /sys/block/zram<id>/invalid_io | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The invalid_io file is read-only and specifies the number of | ||
| non-page-size-aligned I/O requests issued to this device. | ||
| Now accessible via zram<id>/io_stat node. | ||
| What: /sys/block/zram<id>/failed_reads | ||
| Date: August 2015 | ||
| 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. | ||
| Now accessible via zram<id>/io_stat node. | ||
| What: /sys/block/zram<id>/failed_writes | ||
| Date: August 2015 | ||
| 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. | ||
| Now accessible via zram<id>/io_stat node. | ||
| What: /sys/block/zram<id>/notify_free | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The notify_free file is read-only. Depending on device usage | ||
| scenario it may account a) the number of pages freed because | ||
| of swap slot free notifications or b) the number of pages freed | ||
| because of REQ_DISCARD requests sent by bio. The former ones | ||
| are sent to a swap block device when a swap slot is freed, which | ||
| implies that this disk is being used as a swap disk. The latter | ||
| ones are sent by filesystem mounted with discard option, | ||
| whenever some data blocks are getting discarded. | ||
| Now accessible via zram<id>/io_stat node. | ||
| What: /sys/block/zram<id>/zero_pages | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| 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. | ||
| Now accessible via zram<id>/mm_stat node. | ||
| What: /sys/block/zram<id>/orig_data_size | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| 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 | ||
| Now accessible via zram<id>/mm_stat node. | ||
| What: /sys/block/zram<id>/compr_data_size | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| 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 | ||
| Now accessible via zram<id>/mm_stat node. | ||
| </ |