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/Documentation/filesystems/
Doverlayfs.txt8 overlay-filesystem functionality in Linux (sometimes referred to as
9 union-filesystems). An overlay-filesystem tries to present a
15 ---------------
23 While directories will report an st_dev from the overlay-filesystem,
24 non-directory objects may report an st_dev from the lower filesystem or
27 over the lifetime of a non-directory object. Many applications and
30 In the special case of all overlay layers on the same underlying
45 feature with the "-o xino=on" overlay mount option. That is useful for the
46 case of underlying filesystems like xfs and tmpfs, which use 64bit inode
50 Upper and Lower
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Disofs.txt12 There is also an option of doing UTF-8 translations with the
14 utf8 Encode Unicode names in UTF-8 format. Default is no.
21 check=strict Matches only filenames with the exact same case
23 map=off Do not map non-Rock Ridge filenames to lower case
24 map=normal Map non-Rock Ridge filenames to lower case
44 http://www.y-adagio.com/
45 ftp://ftp.ecma.ch/ecma-st/Ecma-119.pdf
46 Quoting from the PDF "This 2nd Edition of Standard ECMA-119 is technically
Dvfat.txt2 ----------------------------------------------------------------------
4 mount -t vfat /dev/fd0 /mnt
10 ----------------------------------------------------------------------
11 uid=### -- Set the owner of all files on this filesystem.
14 gid=### -- Set the group of all files on this filesystem.
17 umask=### -- The permission mask (for files and directories, see umask(1)).
20 dmask=### -- The permission mask for the directory.
23 fmask=### -- The permission mask for files.
26 allow_utime=### -- This option controls the permission check of mtime/atime.
28 20 - If current process is in group of file's group ID,
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/Documentation/devicetree/bindings/usb/
Dusb-device.txt5 http://www.devicetree.org/open-firmware/bindings/usb/usb-1_0.ps
7 Four types of device-tree nodes are defined: "host-controller nodes"
21 - compatible: "usbVID,PID", where VID is the vendor id and PID the product id.
22 The textual representation of VID and PID shall be in lower case hexadecimal
26 - reg: the number of the USB hub port or the USB host-controller port to which
27 this device is attached. The range is 1-255.
31 - #address-cells: shall be 2
32 - #size-cells: shall be 0
36 - compatible: "usbifVID,PID.configCN.IN", where VID is the vendor id, PID is
38 number. The textual representation of VID, PID, CN and IN shall be in lower
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/Documentation/block/
Dcmdline-partition.rst15 blkdevparts=<blkdev-def>[;<blkdev-def>]
16 <blkdev-def> := <blkdev-id>:<partdef>[,<partdef>]
17 <partdef> := <size>[@<offset>](part-name)
19 <blkdev-id>
25 size may contain an optional suffix of (upper or lower case):
29 "-" is used to denote all remaining space.
33 offset may contain an optional suffix of (upper or lower case):
37 (part-name)
48 'blkdevparts=mmcblk0:1G(data0),1G(data1),-;mmcblk0boot0:1m(boot),-(kernel)'
/Documentation/filesystems/ext4/
Dgroup_descr.rst1 .. SPDX-License-Identifier: GPL-2.0
4 -----------------------
22 grouped together into a meta group. Note that in the meta\_bg case,
38 checksum is the lower 16 bits of the checksum of the FS UUID, the group
45 .. list-table::
47 :header-rows: 1
49 * - Offset
50 - Size
51 - Name
52 - Description
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/Documentation/vm/
Dbalance.rst15 overhead of page reclaim. This may happen for opportunistic high-order
16 allocation requests that have order-0 fallback options. In such cases,
43 zone size (and possibly of the size of lower class zones), we can decide
46 of lower class zones, the bad part is, we might do too frequent balancing
47 due to ignoring possibly lower usage in the lower class zones. Also,
52 of a zone _and_ all its lower class zones falls below 1/64th of the
53 total memory in the zone and its lower class zones. This fixes the 2.2
67 for non-sleepable allocations. Second, the HIGHMEM zone is also balanced,
87 are per-zone fields, used to determine when a zone needs to be balanced. When
94 pages is below watermark[WMARK_LOW]; in which case zone_wake_kswapd is also set.
[all …]
/Documentation/cpu-freq/
Dcpu-drivers.txt8 - information for developers -
18 fly. This is a nice method to save battery power, because the lower
23 ---------
26 1.2 Per-CPU Initialization
39 So, you just got a brand-new CPU / chipset with datasheets and want to
45 ------------------
54 .name - The name of this driver.
56 .init - A pointer to the per-policy initialization function.
58 .verify - A pointer to a "verification" function.
60 .setpolicy _or_ .fast_switch _or_ .target _or_ .target_index - See
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/Documentation/scsi/
Dscsi_eh.txt12 [1-1] struct scsi_cmnd
13 [1-2] How do scmd's get completed?
14 [1-2-1] Completing a scmd w/ scsi_done
15 [1-2-2] Completing a scmd w/ timeout
16 [1-3] How EH takes over
18 [2-1] EH through fine-grained callbacks
19 [2-1-1] Overview
20 [2-1-2] Flow of scmds through EH
21 [2-1-3] Flow of control
22 [2-2] EH through transportt->eh_strategy_handler()
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Dmegaraid.txt5 --------
29 -------
36 - Jeff Garzik (jgarzik@pobox.com), 02.25.2004 LKML
38 "As Jeff hinted, if your userspace<->driver API is consistent between
39 your new MPT-based RAID controllers and your existing megaraid driver,
42 handles registering the /dev/megaraid node dynamically. In this case,
47 - Matt Domsch, (Matt_Domsch@dell.com), 02.25.2004 LKML
50 ------
59 The lower level drivers now understand only a new improved ioctl packet called
/Documentation/hwmon/
Dadt7470.rst17 -----------
22 The ADT7470 uses the 2-wire interface compatible with the SMBus 2.0
24 external temperatures. It has four (4) 16-bit counters for measuring fan speed.
45 ----------------
47 The ADT7470 has a 8-bit ADC and is capable of measuring temperatures with 1
54 -------------------
61 * pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
63 - point1: Set the pwm speed at a lower temperature bound.
64 - point2: Set the pwm speed at a higher temperature bound.
66 The ADT7470 will scale the pwm between the lower and higher pwm speed when
[all …]
Dsmsc47m192.rst10 Addresses scanned: I2C 0x2c - 0x2d
23 - Hartmut Rick <linux@rick.claranet.de>
25 - Special thanks to Jean Delvare for careful checking
30 -----------
33 of the SMSC LPC47M192 and compatible Super-I/O chips.
42 Voltages and temperatures are measured by an 8-bit ADC, the resolution
64 ---------------
77 in[0-7]_min,
78 in[0-7]_max lower and upper alarm thresholds for in[0-7]_input reading
82 in[0-7]_alarm alarm flags for voltage inputs
[all …]
Dlm78.rst6 * National Semiconductor LM78 / LM78-J
10 Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
20 Addresses scanned: I2C 0x28 - 0x2f, ISA 0x290 (8 I/O ports)
28 - Frodo Looijaard <frodol@dds.nl>
29 - Jean Delvare <jdelvare@suse.de>
32 -----------
34 This driver implements support for the National Semiconductor LM78, LM78-J
38 the LM78 and LM78-J are exactly identical. The LM79 has one more VID line,
39 which is used to report the lower voltages newer Pentium processors use.
49 this case, alarms are issued during all the time when the actual temperature
[all …]
Dnsa320.rst22 Adam Baker <linux@baker-net.org.uk>
25 -----------
31 interface behaves similarly to SPI but at much lower speeds than are normally
40 sysfs-Interface
41 ---------------
49 -----
63 fan speed. As the most likely case for two accesses in quick succession is
Dk8temp.rst19 -----------
24 revisions of K8 except the first two revisions (SH-B0 and SH-B3).
26 Please note that you will need at least lm-sensors 2.10.1 for proper userspace
30 will auto-detect the sensors and will display only temperatures from
44 temperature is updated once a second. Valid temperatures are from -49 to
48 This temperature is defined as temperature between heat-spreader and CPU
49 case, so the internal CPU temperature supplied by this driver can be higher.
54 computed temperature called TControl, which must be lower than TControlMax.
58 temp1_input - TjOffset*2 < TControlMax,
61 70 degrees C. The rule of the thumb -> CPU temperature should not cross
Dadt7475.rst39 - Jordan Crouse
40 - Hans de Goede
41 - Darrick J. Wong (documentation)
42 - Jean Delvare
46 -----------
56 The ADT747x uses the 2-wire interface compatible with the SMBus 2.0
58 temperatures and two (2) or more voltages. It has four (4) 16-bit counters
78 ------------------------
99 -------------
104 in0 2.5VIN (22) 2.5VIN (22) - -
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/Documentation/usb/
Ddwc3.rst11 - Convert interrupt handler to per-ep-thread-irq
13 As it turns out some DWC3-commands ~1ms to complete. Currently we spin
18 - dwc core implements a demultiplexing irq chip for interrupts per
20 to the device. If MSI provides per-endpoint interrupt this dummy
22 - interrupts are requested / allocated on usb_ep_enable() and removed on
23 usb_ep_disable(). Worst case are 32 interrupts, the lower limit is two
25 - dwc3_send_gadget_ep_cmd() will sleep in wait_for_completion_timeout()
27 - the interrupt handler is split into the following pieces:
29 - primary handler of the device
34 - threaded handler of the device
[all …]
/Documentation/devicetree/bindings/mfd/
Dmfd.txt1 Multi-Function Devices (MFD)
4 more than one non-unique yet varying hardware functionality.
8 - A mixed signal ASIC on an external bus, sometimes a PMIC (Power Management
9 Integrated Circuit) that is manufactured in a lower technology node (rough
14 - A range of memory registers containing "miscellaneous system registers" also
20 - compatible : "simple-mfd" - this signifies that the operating system should
22 "simple-bus" indicates when to see subnodes as children for a simple
23 memory-mapped bus. For more complex devices, when the nexus driver has to
25 be used. In the latter case the child devices will be determined by the
28 - ranges: Describes the address mapping relationship to the parent. Should set
[all …]
/Documentation/devicetree/bindings/slimbus/
Dbus.txt3 SLIMbus is a 2-wire bus, and is used to communicate with peripheral
4 components like audio-codec.
7 - compatible - name of SLIMbus controller
18 In some cases it may be necessary to describe non-probeable device
19 details such as non-standard ways of powering up a device. In
24 - reg - Should be ('Device index', 'Instance ID') from SLIMbus
31 - compatible -"slimMID,PID". The textual representation of Manufacturer ID,
32 Product Code, shall be in lower case hexadecimal with leading
38 compatible = "qcom,apq8064-slim", "qcom,slim";
42 clock-names = "iface", "core";
[all …]
/Documentation/devicetree/bindings/soundwire/
Dsoundwire-controller.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/soundwire/soundwire-controller.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
11 - Vinod Koul <vkoul@kernel.org>
21 "#address-cells":
24 "#size-cells":
28 "^.*@[0-9a-f],[0-9a-f]$":
33 pattern: "^sdw[0-9a-f]{1}[0-9a-f]{4}[0-9a-f]{4}[0-9a-f]{2}$"
[all …]
/Documentation/driver-api/nfc/
Dnfc-hci.rst5 - Author: Eric Lapuyade, Samuel Ortiz
6 - Contact: eric.lapuyade@intel.com, samuel.ortiz@intel.com
9 -------
12 enables easy writing of HCI-based NFC drivers. The HCI layer runs as an NFC Core
17 ---
30 - one for executing commands : nfc_hci_msg_tx_work(). Only one command
32 - one for dispatching received events and commands : nfc_hci_msg_rx_work().
35 --------------------------
41 In case the chip supports pre-opened gates and pseudo-static pipes, the driver
45 -------------------
[all …]
/Documentation/core-api/
Dprintk-formats.rst6 :Author: Andrew Murray <amurray@mpc-data.co.uk>
15 ------------------------------------------------------------
39 blkcnt_t) or is architecture-dependent for its size (e.g., tcflag_t), use a
62 of printing the address itself. In this case, the following error messages
70 --------------
78 has the added benefit of providing a unique identifier. On 64-bit machines
83 -------------------------
111 when tail-calls are used and marked with the noreturn GCC attribute.
114 ---------------
121 users. The behaviour of %pK depends on the kptr_restrict sysctl - see
[all …]
/Documentation/admin-guide/mm/
Dksm.rst10 KSM is a memory-saving de-duplication feature, enabled by CONFIG_KSM=y,
21 content which can be replaced by a single write-protected page (which
49 may suddenly require more memory than is available - possibly failing
50 with EAGAIN, but more probably arousing the Out-Of-Memory killer.
62 will exceed ``vm.max_map_count`` (see Documentation/admin-guide/sysctl/vm.rst).
96 in the memory area of same NUMA node. That brings lower
99 lower latency of setting 0. Smaller systems, which need to
141 deduplication factor will be, but the slower the worst case
156 lower latency, but they will make ksmd use more CPU during the
187 --
/Documentation/locking/
Drt-mutex-design.rst2 RT-mutex implementation design
12 Documentation/locking/rt-mutex.rst. Although this document does explain problems
22 ----------------------------
24 Priority inversion is when a lower priority process executes while a higher
27 to use a resource that a lower priority process has (a mutex for example),
28 the high priority process must wait until the lower priority process is done
31 priority process is prevented from running by a lower priority process for
49 A ---+
52 C +----+
54 B +-------->
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/Documentation/devicetree/bindings/sound/
Dqcom,wcd9335.txt3 Qualcomm WCD9335 Codec is a standalone Hi-Fi audio codec IC, supports
5 the MSM8996, MSM8976, and MSM8956 chipsets. It has in-built
11 - compatible:
16 shall be in lower case hexadecimal with leading zeroes
21 - reg
26 - interrupts
28 Value type: <prop-encoded-array>
31 - interrupt-names:
37 - reset-gpios:
42 - slim-ifc-dev:
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