Loading Documentation/ABI/testing/sysfs-block +9 −0 Original line number Diff line number Diff line Loading @@ -279,3 +279,12 @@ Description: size in 512B sectors of the zones of the device, with the eventual exception of the last zone of the device which may be smaller. What: /sys/block/<disk>/queue/io_timeout Date: November 2018 Contact: Weiping Zhang <zhangweiping@didiglobal.com> Description: io_timeout is the request timeout in milliseconds. If a request does not complete in this time then the block driver timeout handler is invoked. That timeout handler can decide to retry the request, to fail it or to start a device recovery strategy. Documentation/ABI/testing/sysfs-block-zram +9 −2 Original line number Diff line number Diff line Loading @@ -122,11 +122,18 @@ Description: statistics (bd_count, bd_reads, bd_writes) in a format similar to block layer statistics file format. What: /sys/block/zram<id>/writeback_limit_enable Date: November 2018 Contact: Minchan Kim <minchan@kernel.org> Description: The writeback_limit_enable file is read-write and specifies eanbe of writeback_limit feature. "1" means eable the feature. No limit "0" is the initial state. What: /sys/block/zram<id>/writeback_limit Date: November 2018 Contact: Minchan Kim <minchan@kernel.org> Description: The writeback_limit file is read-write and specifies the maximum amount of writeback ZRAM can do. The limit could be changed in run time and "0" means disable the limit. No limit is the initial state. in run time. Documentation/block/bfq-iosched.txt +7 −0 Original line number Diff line number Diff line Loading @@ -357,6 +357,13 @@ video playing/streaming, a very low drop rate may be more important than maximum throughput. In these cases, consider setting the strict_guarantees parameter. slice_idle_us ------------- Controls the same tuning parameter as slice_idle, but in microseconds. Either tunable can be used to set idling behavior. Afterwards, the other tunable will reflect the newly set value in sysfs. strict_guarantees ----------------- Loading Documentation/block/null_blk.txt +2 −1 Original line number Diff line number Diff line Loading @@ -88,7 +88,8 @@ shared_tags=[0/1]: Default: 0 zoned=[0/1]: Default: 0 0: Block device is exposed as a random-access block device. 1: Block device is exposed as a host-managed zoned block device. 1: Block device is exposed as a host-managed zoned block device. Requires CONFIG_BLK_DEV_ZONED. zone_size=[MB]: Default: 256 Per zone size when exposed as a zoned block device. Must be a power of two. Documentation/block/queue-sysfs.txt +7 −0 Original line number Diff line number Diff line Loading @@ -67,6 +67,13 @@ If set to a value larger than 0, the kernel will put the process issuing IO to sleep for this amount of microseconds before entering classic polling. io_timeout (RW) --------------- io_timeout is the request timeout in milliseconds. If a request does not complete in this time then the block driver timeout handler is invoked. That timeout handler can decide to retry the request, to fail it or to start a device recovery strategy. iostats (RW) ------------- This file is used to control (on/off) the iostats accounting of the Loading Loading
Documentation/ABI/testing/sysfs-block +9 −0 Original line number Diff line number Diff line Loading @@ -279,3 +279,12 @@ Description: size in 512B sectors of the zones of the device, with the eventual exception of the last zone of the device which may be smaller. What: /sys/block/<disk>/queue/io_timeout Date: November 2018 Contact: Weiping Zhang <zhangweiping@didiglobal.com> Description: io_timeout is the request timeout in milliseconds. If a request does not complete in this time then the block driver timeout handler is invoked. That timeout handler can decide to retry the request, to fail it or to start a device recovery strategy.
Documentation/ABI/testing/sysfs-block-zram +9 −2 Original line number Diff line number Diff line Loading @@ -122,11 +122,18 @@ Description: statistics (bd_count, bd_reads, bd_writes) in a format similar to block layer statistics file format. What: /sys/block/zram<id>/writeback_limit_enable Date: November 2018 Contact: Minchan Kim <minchan@kernel.org> Description: The writeback_limit_enable file is read-write and specifies eanbe of writeback_limit feature. "1" means eable the feature. No limit "0" is the initial state. What: /sys/block/zram<id>/writeback_limit Date: November 2018 Contact: Minchan Kim <minchan@kernel.org> Description: The writeback_limit file is read-write and specifies the maximum amount of writeback ZRAM can do. The limit could be changed in run time and "0" means disable the limit. No limit is the initial state. in run time.
Documentation/block/bfq-iosched.txt +7 −0 Original line number Diff line number Diff line Loading @@ -357,6 +357,13 @@ video playing/streaming, a very low drop rate may be more important than maximum throughput. In these cases, consider setting the strict_guarantees parameter. slice_idle_us ------------- Controls the same tuning parameter as slice_idle, but in microseconds. Either tunable can be used to set idling behavior. Afterwards, the other tunable will reflect the newly set value in sysfs. strict_guarantees ----------------- Loading
Documentation/block/null_blk.txt +2 −1 Original line number Diff line number Diff line Loading @@ -88,7 +88,8 @@ shared_tags=[0/1]: Default: 0 zoned=[0/1]: Default: 0 0: Block device is exposed as a random-access block device. 1: Block device is exposed as a host-managed zoned block device. 1: Block device is exposed as a host-managed zoned block device. Requires CONFIG_BLK_DEV_ZONED. zone_size=[MB]: Default: 256 Per zone size when exposed as a zoned block device. Must be a power of two.
Documentation/block/queue-sysfs.txt +7 −0 Original line number Diff line number Diff line Loading @@ -67,6 +67,13 @@ If set to a value larger than 0, the kernel will put the process issuing IO to sleep for this amount of microseconds before entering classic polling. io_timeout (RW) --------------- io_timeout is the request timeout in milliseconds. If a request does not complete in this time then the block driver timeout handler is invoked. That timeout handler can decide to retry the request, to fail it or to start a device recovery strategy. iostats (RW) ------------- This file is used to control (on/off) the iostats accounting of the Loading
