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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-01 20:59:13 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-01 20:59:13 +0300 |
commit | 9c75b68b91ff010d8d4c703b93954f605e2ef516 (patch) | |
tree | 5bf53b0c610a5abf0cd874d0687f4e731009fda4 /Documentation/ABI/testing/sysfs-class-pktcdvd | |
parent | 2376cca02d73a67ab28f03aa787777b74c3b0230 (diff) | |
parent | 2fcce37a3d2f2f3d7fa36aad2b71cbaca135ffd4 (diff) | |
download | linux-9c75b68b91ff010d8d4c703b93954f605e2ef516.tar.xz |
Merge tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and documentation fixes from Greg KH:
"Here is one tiny debugfs change to fix up an API where the last user
was successfully fixed up in 5.10-rc1 (so it couldn't be merged
earlier), and a much larger Documentation/ABI/ update to the files so
they can be automatically parsed by our tools.
The Documentation/ABI/ updates are just formatting issues, small ones
to bring the files into parsable format, and have been acked by
numerous subsystem maintainers and the documentation maintainer. I
figured it was good to get this into 5.10-rc2 to help wih the merge
issues that would arise if these were to stick in linux-next until
5.11-rc1.
The debugfs change has been in linux-next for a long time, and the
Documentation updates only for the last linux-next release"
* tag 'driver-core-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (40 commits)
scripts: get_abi.pl: assume ReST format by default
docs: ABI: sysfs-class-led-trigger-pattern: remove hw_pattern duplication
docs: ABI: sysfs-class-backlight: unify ABI documentation
docs: ABI: sysfs-c2port: remove a duplicated entry
docs: ABI: sysfs-class-power: unify duplicated properties
docs: ABI: unify /sys/class/leds/<led>/brightness documentation
docs: ABI: stable: remove a duplicated documentation
docs: ABI: change read/write attributes
docs: ABI: cleanup several ABI documents
docs: ABI: sysfs-bus-nvdimm: use the right format for ABI
docs: ABI: vdso: use the right format for ABI
docs: ABI: fix syntax to be parsed using ReST notation
docs: ABI: convert testing/configfs-acpi to ReST
docs: Kconfig/Makefile: add a check for broken ABI files
docs: abi-testing.rst: enable --rst-sources when building docs
docs: ABI: don't escape ReST-incompatible chars from obsolete and removed
docs: ABI: create a 2-depth index for ABI
docs: ABI: make it parse ABI/stable as ReST-compatible files
docs: ABI: sysfs-uevent: make it compatible with ReST output
docs: ABI: testing: make the files compatible with ReST output
...
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-pktcdvd')
-rw-r--r-- | Documentation/ABI/testing/sysfs-class-pktcdvd | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-pktcdvd b/Documentation/ABI/testing/sysfs-class-pktcdvd index dde4f26d0780..ba1ce626591d 100644 --- a/Documentation/ABI/testing/sysfs-class-pktcdvd +++ b/Documentation/ABI/testing/sysfs-class-pktcdvd @@ -11,15 +11,17 @@ KernelVersion: 2.6.20 Contact: Thomas Maier <balagi@justmail.de> Description: - add: (WO) Write a block device id (major:minor) to + ========== ============================================== + add (WO) Write a block device id (major:minor) to create a new pktcdvd device and map it to the block device. - remove: (WO) Write the pktcdvd device id (major:minor) + remove (WO) Write the pktcdvd device id (major:minor) to remove the pktcdvd device. - device_map: (RO) Shows the device mapping in format: + device_map (RO) Shows the device mapping in format: pktcdvd[0-7] <pktdevid> <blkdevid> + ========== ============================================== What: /sys/class/pktcdvd/pktcdvd[0-7]/dev @@ -65,29 +67,31 @@ Date: Oct. 2006 KernelVersion: 2.6.20 Contact: Thomas Maier <balagi@justmail.de> Description: - size: (RO) Contains the size of the bio write queue. + ============== ================================================ + size (RO) Contains the size of the bio write queue. - congestion_off: (RW) If bio write queue size is below this mark, + congestion_off (RW) If bio write queue size is below this mark, accept new bio requests from the block layer. - congestion_on: (RW) If bio write queue size is higher as this + congestion_on (RW) If bio write queue size is higher as this mark, do no longer accept bio write requests from the block layer and wait till the pktcdvd device has processed enough bio's so that bio write queue size is below congestion off mark. A value of <= 0 disables congestion control. + ============== ================================================ Example: -------- -To use the pktcdvd sysfs interface directly, you can do: - -# create a new pktcdvd device mapped to /dev/hdc -echo "22:0" >/sys/class/pktcdvd/add -cat /sys/class/pktcdvd/device_map -# assuming device pktcdvd0 was created, look at stat's -cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written -# print the device id of the mapped block device -fgrep pktcdvd0 /sys/class/pktcdvd/device_map -# remove device, using pktcdvd0 device id 253:0 -echo "253:0" >/sys/class/pktcdvd/remove +To use the pktcdvd sysfs interface directly, you can do:: + + # create a new pktcdvd device mapped to /dev/hdc + echo "22:0" >/sys/class/pktcdvd/add + cat /sys/class/pktcdvd/device_map + # assuming device pktcdvd0 was created, look at stat's + cat /sys/class/pktcdvd/pktcdvd0/stat/kb_written + # print the device id of the mapped block device + fgrep pktcdvd0 /sys/class/pktcdvd/device_map + # remove device, using pktcdvd0 device id 253:0 + echo "253:0" >/sys/class/pktcdvd/remove |