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| Original file line number | Diff line number | Diff line change |
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| Christoph Hellwig <hch@lst.de> |
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| Original file line number | Diff line number | Diff line change |
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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. | ||
|
|
||
| What: /sys/block/zram<id>/mem_used_total | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| 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 | ||
| Now accessible via zram<id>/mm_stat node. | ||
|
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||
| What: /sys/block/zram<id>/mem_used_max | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The mem_used_max file is read/write and specifies the amount | ||
| of maximum memory zram have consumed to store compressed data. | ||
| For resetting the value, you should write "0". Otherwise, | ||
| you could see -EINVAL. | ||
| Unit: bytes | ||
| Downgraded to write-only node: so it's possible to set new | ||
| value only; its current value is stored in zram<id>/mm_stat | ||
| node. | ||
|
|
||
| What: /sys/block/zram<id>/mem_limit | ||
| Date: August 2015 | ||
| Contact: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> | ||
| Description: | ||
| The mem_limit file is read/write and specifies the maximum | ||
| amount of memory ZRAM can use to store the compressed data. | ||
| The limit could be changed in run time and "0" means disable | ||
| the limit. No limit is the initial state. Unit: bytes | ||
| Downgraded to write-only node: so it's possible to set new | ||
| value only; its current value is stored in zram<id>/mm_stat | ||
| node. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| What: /sys/bus/vmbus/devices/vmbus_*/id | ||
| Date: Jul 2009 | ||
| KernelVersion: 2.6.31 | ||
| Contact: K. Y. Srinivasan <kys@microsoft.com> | ||
| Description: The VMBus child_relid of the device's primary channel | ||
| Users: tools/hv/lsvmbus | ||
|
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| What: /sys/bus/vmbus/devices/vmbus_*/class_id | ||
| Date: Jul 2009 | ||
| KernelVersion: 2.6.31 | ||
| Contact: K. Y. Srinivasan <kys@microsoft.com> | ||
| Description: The VMBus interface type GUID of the device | ||
| Users: tools/hv/lsvmbus | ||
|
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| What: /sys/bus/vmbus/devices/vmbus_*/device_id | ||
| Date: Jul 2009 | ||
| KernelVersion: 2.6.31 | ||
| Contact: K. Y. Srinivasan <kys@microsoft.com> | ||
| Description: The VMBus interface instance GUID of the device | ||
| Users: tools/hv/lsvmbus | ||
|
|
||
| What: /sys/bus/vmbus/devices/vmbus_*/channel_vp_mapping | ||
| Date: Jul 2015 | ||
| KernelVersion: 4.2.0 | ||
| Contact: K. Y. Srinivasan <kys@microsoft.com> | ||
| Description: The mapping of which primary/sub channels are bound to which | ||
| Virtual Processors. | ||
| Format: <channel's child_relid:the bound cpu's number> | ||
| Users: tools/hv/lsvmbus |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,11 @@ | ||
| What: /sys/bus/w1/devices/.../w1_master_timeout_us | ||
| Date: April 2015 | ||
| Contact: Dmitry Khromov <dk@icelogic.net> | ||
| Description: Bus scanning interval, microseconds component. | ||
| Some of 1-Wire devices commonly associated with physical access | ||
| control systems are attached/generate presence for as short as | ||
| 100 ms - hence the tens-to-hundreds milliseconds scan intervals | ||
| are required. | ||
| see Documentation/w1/w1.generic for detailed information. | ||
| Users: any user space application which wants to know bus scanning | ||
| interval |
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| # Note: This documents additional properties of any device beyond what | ||
| # is documented in Documentation/sysfs-rules.txt | ||
|
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||
| What: /sys/devices/*/of_path | ||
| Date: February 2015 | ||
| Contact: Device Tree mailing list <devicetree@vger.kernel.org> | ||
| Description: | ||
| Any device associated with a device-tree node will have | ||
| an of_path symlink pointing to the corresponding device | ||
| node in /sys/firmware/devicetree/ |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| What: /sys/bus/w1/devices/.../w1_seq | ||
| Date: Apr 2015 | ||
| Contact: Matt Campbell <mattrcampbell@gmail.com> | ||
| Description: Support for the DS28EA00 chain sequence function | ||
| see Documentation/w1/slaves/w1_therm for detailed information | ||
| Users: any user space application which wants to communicate with DS28EA00 |
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