Searched +full:per +full:- +full:operation (Results 1 – 25 of 293) sorted by relevance
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| /Documentation/core-api/ |
| D | this_cpu_ops.rst | 8 this_cpu operations are a way of optimizing access to per cpu
11 the cpu permanently stored the beginning of the per cpu area for a
14 this_cpu operations add a per cpu variable offset to the processor
15 specific per cpu base and encode that operation in the instruction
16 operating on the per cpu variable.
19 the offset and the operation on the data. Therefore it is not
22 the operation on the data.
24 Read-modify-write operations are of particular interest. Frequently
32 synchronization is not necessary since we are dealing with per cpu
37 Please note that accesses by remote processors to a per cpu area are
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| D | netlink.rst | 1 .. SPDX-License-Identifier: BSD-3-Clause
13 ---------------
21 -------------
31 ---------------
34 commands. User only gets information whether the operation succeeded or
44 ----------
51 ------------------------
54 them - make sure to report dump inconsistency with ``NLM_F_DUMP_INTR``.
65 -------
67 kernel-policy
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| /Documentation/admin-guide/cgroup-v1/ |
| D | blkio-controller.rst | 22 -----------------------------
33 mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
98 --------------------------------
101 Specifies per cgroup weight. This is default weight of the group
102 on all the devices until and unless overridden by per device rule
106 see Documentation/block/bfq-iosched.rst.
109 Specifies per cgroup per device weights, overriding the default group
110 weight. For more details, see Documentation/block/bfq-iosched.rst.
139 Disk time allocated to cgroup per device in milliseconds. First
152 are further divided by the type of operation - read or write, sync
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| /Documentation/w1/masters/ |
| D | w1-uart.rst | 1 .. SPDX-License-Identifier: GPL-2.0-or-later
4 Kernel driver w1-uart
11 -----------
13 UART 1-Wire bus driver. The driver utilizes the UART interface via the
14 Serial Device Bus to create the 1-Wire timing patterns as described in
15 the document `"Using a UART to Implement a 1-Wire Bus Master"`_.
17 …g a UART to Implement a 1-Wire Bus Master": https://www.analog.com/en/technical-articles/using-a-u…
19 In short, the UART peripheral must support full-duplex and operate in
20 open-drain mode. The timing patterns are generated by a specific
21 combination of baud-rate and transmitted byte, which corresponds to a
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| /Documentation/arch/x86/ |
| D | buslock.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 :Authors: - Fenghua Yu <fenghua.yu@intel.com>
11 - Tony Luck <tony.luck@intel.com>
16 A split lock is any atomic operation whose operand crosses two cache lines.
17 Since the operand spans two cache lines and the operation must be atomic,
21 memory or any locked access to non-WB memory. This is typically thousands of
22 cycles slower than an atomic operation within a cache line. It also disrupts
32 --------------------------------------
35 Alignment Check (#AC) exception when a split lock operation is attempted.
38 ------------------------------------
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| /Documentation/devicetree/bindings/media/i2c/ |
| D | tc358743.txt | 1 * Toshiba TC358743 HDMI-RX to MIPI CSI2-TX Bridge
3 The Toshiba TC358743 HDMI-RX to MIPI CSI2-TX (H2C) is a bridge that converts
4 a HDMI stream to MIPI CSI-2 TX. It is programmable through I2C.
8 - compatible: value should be "toshiba,tc358743"
9 - clocks, clock-names: should contain a phandle link to the reference clock
14 - reset-gpios: gpio phandle GPIO connected to the reset pin
15 - interrupts: GPIO connected to the interrupt pin
16 - data-lanes: should be <1 2 3 4> for four-lane operation,
17 or <1 2> for two-lane operation
18 - clock-lanes: should be <0>
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| D | imx219.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Sony 1/4.0-Inch 8Mpixel CMOS Digital Image Sensor
10 - Dave Stevenson <dave.stevenson@raspberrypi.com>
12 description: |-
13 The Sony imx219 is a 1/4.0-inch CMOS active pixel digital image sensor
15 I2C interface. The I2C address is fixed to 0x10 as per sensor data sheet.
16 Image data is sent through MIPI CSI-2, which is configured as either 2 or
30 VDIG-supply:
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| D | st,st-mipid02.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/media/i2c/st,st-mipid02.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics MIPID02 CSI-2 to PARALLEL bridge
10 - Benjamin Mugnier <benjamin.mugnier@foss.st.com>
11 - Sylvain Petinot <sylvain.petinot@foss.st.com>
14 MIPID02 has two CSI-2 input ports, only one of those ports can be
15 active at a time. Active port input stream will be de-serialized
17 CSI-2 first input port is a dual lane 800Mbps per lane whereas CSI-2
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| /Documentation/admin-guide/mm/damon/ |
| D | usage.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 - *DAMON user space tool.*
11 system administrators who want a just-working human-friendly interface.
12 Using this, users can use the DAMON’s major features in a human-friendly way.
16 - *sysfs interface.*
23 - *Kernel Space Programming Interface.*
29 - *debugfs interface. (DEPRECATED!)*
34 linux-mm@kvack.org.
57 ---------------
60 figure, parents-children relations are represented with indentations, each
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| D | reclaim.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based Reclamation
7 DAMON-based Reclamation (DAMON_RECLAIM) is a static kernel module that aimed to
9 It doesn't aim to replace the LRU-list based page_granularity reclamation, but
15 On general memory over-committed systems, proactively reclaiming cold pages
20 Free Pages Reporting [3]_ based memory over-commit virtualization systems are
24 guests could be not so memory-frugal, mainly because some kernel subsystems and
25 user-space applications are designed to use as much memory as available. Then,
35 operation, a speed limit can be configured. Under the speed limit, it pages
54 -------
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| /Documentation/admin-guide/perf/ |
| D | thunderx2-pmu.rst | 5 The ThunderX2 SoC PMU consists of independent, system-wide, per-socket
16 overflow interrupt. DMC and L3C counters are 32-bit and read every 2 seconds.
17 The CCPI2 counters are 64-bit and assumed not to overflow in normal operation.
21 The thunderx2_pmu driver registers per-socket perf PMUs for the DMC and
28 work. Per-task perf sessions are also not supported.
32 # perf stat -a -e uncore_dmc_0/cnt_cycles/ sleep 1
34 # perf stat -a -e \
40 # perf stat -a -e \
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| /Documentation/admin-guide/sysctl/ |
| D | user.rst | 9 ------------------------------------------------------------------------------
16 per user per user namespace limits.
22 no program in normal operation should run into these limits.
24 The creation of per user per user namespace objects are charged to
26 verified to be below the per user limit in that user namespace.
30 in (user namespaces can be nested) and verified to be below the per user
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| /Documentation/admin-guide/device-mapper/ |
| D | dm-zoned.rst | 2 dm-zoned
5 The dm-zoned device mapper target exposes a zoned block device (ZBC and
7 pattern constraints. In effect, it implements a drive-managed zoned
10 host-managed zoned block devices and can mitigate the potential
11 device-side performance degradation due to excessive random writes on
12 host-aware zoned block devices.
21 http://www.t13.org/Documents/UploadedDocuments/docs2015/di537r05-Zoned_Device_ATA_Command_Set_ZAC.p…
23 The dm-zoned implementation is simple and minimizes system overhead (CPU
25 host-managed disk with 256 MB zones, dm-zoned memory usage per disk
29 dm-zoned target devices are formatted and checked using the dmzadm
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| /Documentation/filesystems/ |
| D | directory-locking.rst | 7 kinds of locks - per-inode (->i_rwsem) and per-filesystem
8 (->s_vfs_rename_mutex).
10 When taking the i_rwsem on multiple non-directory objects, we
40 5. rename that is _not_ cross-directory. Locking rules:
45 The source needs to be locked if it's a non-directory, target - if it's
46 a non-directory or about to be removed.
49 are non-directories - the source because it wouldn't need to be locked
50 otherwise and the target because mixing directory and non-directory is
53 6. cross-directory rename. The trickiest in the whole bunch. Locking rules:
56 * if the parents don't have a common ancestor, fail the operation.
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| D | netfs_library.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 - Overview.
10 - Per-inode context.
11 - Inode context helper functions.
12 - Buffered read helpers.
13 - Read helper functions.
14 - Read helper structures.
15 - Read helper operations.
16 - Read helper procedure.
17 - Read helper cache API.
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| /Documentation/hwmon/ |
| D | g762.rst | 5 and performs closed-loop or open-loop control of the fan speed. Two
6 modes - PWM or DC - are supported by the device.
9 http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf. sysfs
10 bindings are described in Documentation/hwmon/sysfs-interface.rst.
13 /sys/bus/i2c/drivers/g762/ to control the operation of the device.
18 hardware characteristics of the system (reference clock, pulses per
25 set desired fan speed. This only makes sense in closed-loop
36 number of pulses per fan revolution. Supported values
44 in closed-loop control mode, if fan RPM value is 25% out
50 speed control (open-loop) via pwm1 described below, 2 for
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| /Documentation/scsi/ |
| D | bnx2fc.rst | 1 .. SPDX-License-Identifier: GPL-2.0
19 support the VLANs that have been discovered for FCoE operation (e.g.
20 eth0.1001-fcoe). Do not delete or disable these interfaces or FCoE operation
26 1. Ensure that fcoe-utils package is installed.
32 b. copy cfg-ethx to cfg-eth5 if FCoE has to be enabled on eth5.
34 d. Edit all the cfg-eth files to set "no" for DCB_REQUIRED** field, and
44 5. "Symbolic Name" in 'fcoeadm -i' output would display if bnx2fc has claimed
49 [root@bh2 ~]# fcoeadm -i
54 Driver: bnx2x 1.70.00-0
65 FC-ID (Port ID): 0x0F0377
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| /Documentation/networking/ |
| D | netif-msg.rst | 1 .. SPDX-License-Identifier: GPL-2.0
10 -------
22 always implemented within +-1 of the specified level. Drivers tended
25 - 0 Minimal messages, only essential information on fatal errors.
26 - 1 Standard messages, initialization status. No run-time messages
27 - 2 Special media selection messages, generally timer-driver.
28 - 3 Interface starts and stops, including normal status messages
29 - 4 Tx and Rx frame error messages, and abnormal driver operation
30 - 5 Tx packet queue information, interrupt events.
31 - 6 Status on each completed Tx packet and received Rx packets
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| /Documentation/virt/kvm/devices/ |
| D | s390_flic.rst | 1 .. SPDX-License-Identifier: GPL-2.0
7 FLIC handles floating (non per-cpu) interrupts, i.e. I/O, service and some
8 machine check interruptions. All interrupts are stored in a per-vm list of
14 - add interrupts (KVM_DEV_FLIC_ENQUEUE)
15 - inspect currently pending interrupts (KVM_FLIC_GET_ALL_IRQS)
16 - purge all pending floating interrupts (KVM_DEV_FLIC_CLEAR_IRQS)
17 - purge one pending floating I/O interrupt (KVM_DEV_FLIC_CLEAR_IO_IRQ)
18 - enable/disable for the guest transparent async page faults
19 - register and modify adapter interrupt sources (KVM_DEV_FLIC_ADAPTER_*)
20 - modify AIS (adapter-interruption-suppression) mode state (KVM_DEV_FLIC_AISM)
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| /Documentation/gpu/ |
| D | drm-vm-bind-async.rst | 1 .. SPDX-License-Identifier: (GPL-2.0+ OR MIT)
10 * ``VRAM``: On-device memory. Sometimes referred to as device local memory.
12 * ``gpu_vm``: A virtual GPU address space. Typically per process, but
15 * ``VM_BIND``: An operation or a list of operations to modify a gpu_vm using
16 an IOCTL. The operations include mapping and unmapping system- or
20 synchronization objects can be either generic, like dma-fences or
24 * ``in-syncobj``: Argument to a VM_BIND IOCTL, the VM_BIND operation waits
27 * ``out-syncobj``: Argument to a VM_BIND_IOCTL, the VM_BIND operation
28 signals these when the bind operation is complete.
30 * ``dma-fence``: A cross-driver synchronization object. A basic
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| /Documentation/pcmcia/ |
| D | locking.rst | 13 - protects only the list of sockets
15 - skt_mutex
16 - serializes card insert / ejection
18 - ops_mutex
19 - serializes socket operation
59 ---------------
65 2. Per-Socket Data:
66 -------------------
69 The "main" struct pcmcia_socket is protected as follows (read-only fields
70 or single-use fields not mentioned):
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| /Documentation/accel/qaic/ |
| D | qaic.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
14 --------------------
21 non-empty and generate MSIs at a rate equivalent to the speed of the
24 MSIs per second. It has been observed that most systems cannot tolerate this
37 generates 100k IRQs per second (per /proc/interrupts) is reduced to roughly 64
42 ---------------
72 QAIC handles and enforces the required little endianness and 64-bit alignment,
96 QAIC creates an accel device per physical PCIe device. This accel device exists
122 to the device. Slicing is the operation of describing what portions of a BO
128 call is non-blocking. Success only indicates that the BOs have been queued
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| /Documentation/netlink/ |
| D | genetlink-legacy.yaml | 1 # SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
3 ---
4 $id: http://kernel.org/schemas/netlink/genetlink-legacy.yaml#
5 $schema: https://json-schema.org/draft-07/schema
12 len-or-define:
14 pattern: ^[0-9A-Za-z_-]+( - 1)?$
16 len-or-limit:
17 # literal int or limit based on fixed-width type e.g. u8-min, u16-max, etc.
19 pattern: ^[su](8|16|32|64)-(min|max)$
26 required: [ name, doc, attribute-sets, operations ]
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| /Documentation/admin-guide/pm/ |
| D | intel_pstate.rst | 1 .. SPDX-License-Identifier: GPL-2.0
22 Documentation/admin-guide/pm/cpufreq.rst if you have not done that yet.]
24 For the processors supported by ``intel_pstate``, the P-state concept is broader
27 information about that). For this reason, the representation of P-states used
32 ``intel_pstate`` maps its internal representation of P-states to frequencies too
38 Since the hardware P-state selection interface used by ``intel_pstate`` is
43 time the corresponding CPU is taken offline and need to be re-initialized when
47 only way to pass early-configuration-time parameters to it is via the kernel
54 Operation Modes
66 -----------
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| /Documentation/userspace-api/media/v4l/ |
| D | dev-meta.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
9 Metadata refers to any non-image data that supplements video frames with
14 control of that operation.
46 member of the ``fmt`` union as needed per the desired operation. Both drivers
60 .. flat-table:: struct v4l2_meta_format
61 :header-rows: 0
62 :stub-columns: 0
65 * - __u32
66 - ``dataformat``
67 - The data format, set by the application. This is a little endian
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