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/Documentation/devicetree/bindings/memory-controllers/
Dti,gpmc-child.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ti,gpmc-child.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Tony Lindgren <tony@atomide.com>
11 - Roger Quadros <rogerq@kernel.org>
24 gpmc,sync-clk-ps:
28 # Chip-select signal timings corresponding to GPMC_CONFIG2:
29 gpmc,cs-on-ns:
33 gpmc,cs-rd-off-ns:
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/Documentation/locking/
Dpi-futex.rst2 Lightweight PI-futexes
5 We are calling them lightweight for 3 reasons:
7 - in the user-space fastpath a PI-enabled futex involves no kernel work
8 (or any other PI complexity) at all. No registration, no extra kernel
9 calls - just pure fast atomic ops in userspace.
11 - even in the slowpath, the system call and scheduling pattern is very
14 - the in-kernel PI implementation is streamlined around the mutex
17 read-write lock support), only the owner may unlock a lock, no
20 Priority Inheritance - why?
21 ---------------------------
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/Documentation/process/
Dsecurity-bugs.rst6 Linux kernel developers take security very seriously. As such, we'd
12 -------
19 security team will bring in extra help from area maintainers to
24 'Documentation/admin-guide/reporting-issues.rst' if you are unclear about what
30 It is much harder to have a context-quoted discussion about a complex
32 :doc:`regular patch submission <../process/submitting-patches>`
37 ------------------------------------
67 ------------------------------
72 handled by the "linux-distros" mailing list and disclosure by the
73 public "oss-security" mailing list, both of which are closely related
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Dhandling-regressions.rst1 .. SPDX-License-Identifier: (GPL-2.0+ OR CC-BY-4.0)
7 *We don't cause regressions* -- this document describes what this "first rule of
9 Documentation/admin-guide/reporting-regressions.rst, which covers the topic from a
21 loop by immediately sending at least a brief "Reply-all" with the list
30 introduced: v5.13..v5.14-rc1``. If not, send a reply (with the regressions
39 #regzbot introduced: v5.13..v5.14-rc1
45 mandated by Documentation/process/submitting-patches.rst and
61 -----------------------------------
72 it into the loop by sending at least a brief "Reply-all" with the list CCed;
79 Documentation/admin-guide/reporting-issues.rst.
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/Documentation/hwmon/
Dmax31827.rst1 .. SPDX-License-Identifier: GPL-2.0
12 Addresses scanned: I2C 0x40 - 0x5f
20 Addresses scanned: I2C 0x40 - 0x5f
28 Addresses scanned: I2C 0x40 - 0x5f
34 - Daniel Matyas <daniel.matyas@analog.com>
37 -----------
40 between them is found in the default power-on behaviour of the chips. While the
45 configuration register. From here on, we will refer to all these chips as
52 hysteresis value: -40 and -30 degrees for under temperature alarm and +100 and
77 The conversions can be manual with the one-shot functionality and automatic with
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Dlm90.rst10 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
26 Prefix: 'lm89' (no auto-detection)
58 Addresses scanned: I2C 0x4c - 0x4e
66 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
74 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
152 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
162 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
172 Addresses scanned: I2C 0x4c - 0x4d
182 Addresses scanned: I2C 0x4c - 0x4d
192 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
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/Documentation/kernel-hacking/
Dhacking.rst20 this document, being grossly under-qualified, but I always wanted to
30 - not associated with any process, serving a hardware interrupt;
32 - not associated with any process, serving a softirq or tasklet;
34 - running in kernel space, associated with a process (user context);
36 - running a process in user space.
44 We'll see a number of ways that the user context can block interrupts,
45 to become truly non-preemptable.
48 ------------
59 In user context, the ``current`` pointer (indicating the task we are
69 -------------------------------
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/Documentation/trace/
Dftrace.rst2 ftrace - Function Tracer
13 - Written for: 2.6.28-rc2
14 - Updated for: 3.10
15 - Updated for: 4.13 - Copyright 2017 VMware Inc. Steven Rostedt
16 - Converted to rst format - Changbin Du <changbin.du@intel.com>
19 ------------
24 performance issues that take place outside of user-space.
41 ----------------------
43 See Documentation/trace/ftrace-design.rst for details for arch porters and such.
47 ---------------
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Dhistogram.rst33 numeric fields - on an event hit, the value(s) will be added to a
35 in place of an explicit value field - this is simply a count of
45 useful for providing more fine-grained summaries of event data.
69 numeric fields are displayed as base-10 integers. This can be
76 .sym-offset display an address as a symbol and offset
83 .graph display a bar-graph of a value
91 - only the 'hex' modifier can be used for values (because values
94 - the 'execname' modifier can only be used on a 'common_pid'. The
100 pid-specific comm fields in the event itself.
119 are in terms of hashtable entries - if a run uses more entries than
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/Documentation/spi/
Dspi-summary.rst5 02-Feb-2012
8 ------------
17 clocking modes through which data is exchanged; mode-0 and mode-3 are most
32 - SPI may be used for request/response style device protocols, as with
35 - It may also be used to stream data in either direction (half duplex),
38 - Some devices may use eight bit words. Others may use different word
39 lengths, such as streams of 12-bit or 20-bit digital samples.
41 - Words are usually sent with their most significant bit (MSB) first,
44 - Sometimes SPI is used to daisy-chain devices, like shift registers.
51 SPI is only one of the names used by such four-wire protocols, and
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/Documentation/scsi/
DChangeLog.lpfc2 * Please read the associated RELEASE-NOTES file !!!
8 * Fixed build warning for 2.6.12-rc2 kernels: mempool_alloc now
19 * Removed FC_TRANSPORT_PATCHESxxx defines. They're in 2.6.12-rc1.
26 * Added PCI ID for LP10000-S.
27 * Changes in lpfc_abort_handler(): Return SUCCESS if we did not
29 if we timed out waiting for command to complete after abort was
31 * Zero-out response sense length in lpfc_scsi_prep_cmnd to prevent
33 - was causing spurious 0710 messages.
40 * Removed extra iotag allocation by lpfc_abort_handler.
55 - stop using volatile. if you need special ordering use memory
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Dscsi_mid_low_api.rst1 .. SPDX-License-Identifier: GPL-2.0
4 SCSI mid_level - lower_level driver interface
14 (SCSI terminology, see SAM-3 at http://www.t10.org) sends SCSI commands
22 Examples are the usb-storage driver (found in the drivers/usb/storage
30 HBAs. These HBAs might be either on PCI daughter-boards or built into
33 has its own PCI device address. [The one-to-one correspondence between
49 documented in Documentation/scsi (e.g. aic7xxx.rst). The SCSI mid-level is
53 scsi-generic.rst (for the sg driver).
68 and OS-specific code (e.g. FreeBSD and Linux). Such drivers tend to have
147 ===-------------------=========--------------------===------
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/Documentation/admin-guide/mm/
Dtranshuge.rst19 in the examples below we presume that the basic page size is 4K and
26 requiring larger clear-page copy-page in page faults which is a
48 Modern kernels support "multi-size THP" (mTHP), which introduces the
50 but smaller than traditional PMD-size (as described above), in
51 increments of a power-of-2 number of pages. mTHP can back anonymous
53 PTE-mapped, but in many cases can still provide similar benefits to
56 prominent because the size of each page isn't as huge as the PMD-sized
66 collapses sequences of basic pages into PMD-sized huge pages.
91 possible to disable hugepages system-wide and to only have them inside
108 -------------------
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/Documentation/sound/hd-audio/
Dnotes.rst2 More Notes on HD-Audio Driver
11 HD-audio is the new standard on-board audio component on modern PCs
12 after AC97. Although Linux has been supporting HD-audio since long
15 This document explains the brief trouble-shooting and debugging
16 methods for the HD-audio hardware.
18 The HD-audio component consists of two parts: the controller chip and
19 the codec chips on the HD-audio bus. Linux provides a single driver
20 for all controllers, snd-hda-intel. Although the driver name contains
21 a word of a well-known hardware vendor, it's not specific to it but for
22 all controller chips by other companies. Since the HD-audio
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/Documentation/block/
Dbfq-iosched.rst5 BFQ is a proportional-share I/O scheduler, with some extra
6 low-latency capabilities. In addition to cgroups support (blkio or io
9 - BFQ guarantees a high system and application responsiveness, and a
10 low latency for time-sensitive applications, such as audio or video
12 - BFQ distributes bandwidth, not just time, among processes or
19 goal, for a given device, is to achieve the maximum-possible
20 throughput at all times, then do switch off all low-latency heuristics
25 As every I/O scheduler, BFQ adds some overhead to per-I/O-request
27 single-lock-protected, per-request processing time of BFQ---i.e., the
29 completion hooks---is, e.g., 1.9 us on an Intel Core i7-2760QM@2.40GHz
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/Documentation/networking/device_drivers/ethernet/intel/
De1000.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 1999 - 2013 Intel Corporation.
13 - Identifying Your Adapter
14 - Command Line Parameters
15 - Speed and Duplex Configuration
16 - Additional Configurations
17 - Support
50 -------
54 :Valid Range: 0x01-0x0F, 0x20-0x2F
57 This parameter is a bit-mask that specifies the speed and duplex settings
[all …]
/Documentation/admin-guide/
Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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Dext4.rst1 .. SPDX-License-Identifier: GPL-2.0
9 (64 bit) in keeping with increasing disk capacities and state-of-the-art
12 Mailing list: linux-ext4@vger.kernel.org
23 - The latest version of e2fsprogs can be found at:
35 - Create a new filesystem using the ext4 filesystem type:
37 # mke2fs -t ext4 /dev/hda1
41 # tune2fs -O extents /dev/hda1
46 # tune2fs -I 256 /dev/hda1
48 - Mounting:
50 # mount -t ext4 /dev/hda1 /wherever
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/Documentation/scheduler/
Dsched-deadline.rst12 3. Scheduling Real-Time Tasks
18 4.1 System-wide settings
33 system behavior. As for -rt (group) scheduling, it is assumed that root users
50 ------------------
70 with the "traditional" real-time task model (see Section 3) can effectively
76 - Each SCHED_DEADLINE task is characterized by the "runtime",
79 - The state of the task is described by a "scheduling deadline", and
82 - When a SCHED_DEADLINE task wakes up (becomes ready for execution),
86 ---------------------------------- > ---------
87 scheduling deadline - current time period
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/Documentation/arch/x86/
Dresctrl.rst1 .. SPDX-License-Identifier: GPL-2.0
9 :Authors: - Fenghua Yu <fenghua.yu@intel.com>
10 - Tony Luck <tony.luck@intel.com>
11 - Vikas Shivappa <vikas.shivappa@intel.com>
38 # mount -t resctrl resctrl [-o cdp[,cdpl2][,mba_MBps][,debug]] /sys/fs/resctrl
57 pseudo-locking is a unique way of using cache control to "pin" or
59 "Cache Pseudo-Locking".
96 own settings for cache use which can over-ride
128 Corresponding region is pseudo-locked. No
131 Indicates if non-contiguous 1s value in CBM is supported.
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/Documentation/virt/kvm/x86/
Dtimekeeping.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Timekeeping Virtualization for X86-Based Architectures
26 First, we will describe the various timekeeping hardware available, then
32 information relevant to KVM and hardware-based virtualization.
37 First we discuss the basic hardware devices available. TSC and the related
41 2.1. i8254 - PIT
42 ----------------
46 channels which can be programmed to deliver periodic or one-shot interrupts.
53 The PIT uses I/O ports 0x40 - 0x43. Access to the 16-bit counters is done
59 -------------- ----------------
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/Documentation/networking/
Dip-sysctl.rst1 .. SPDX-License-Identifier: GPL-2.0
10 ip_forward - BOOLEAN
11 - 0 - disabled (default)
12 - not 0 - enabled
20 ip_default_ttl - INTEGER
25 ip_no_pmtu_disc - INTEGER
27 fragmentation-required ICMP is received, the PMTU to this
38 accept fragmentation-needed errors if the underlying protocol
48 Possible values: 0-3
52 min_pmtu - INTEGER
[all …]
Dbonding.rst1 .. SPDX-License-Identifier: GPL-2.0
11 Corrections, HA extensions: 2000/10/03-15:
13 - Willy Tarreau <willy at meta-x.org>
14 - Constantine Gavrilov <const-g at xpert.com>
15 - Chad N. Tindel <ctindel at ieee dot org>
16 - Janice Girouard <girouard at us dot ibm dot com>
17 - Jay Vosburgh <fubar at us dot ibm dot com>
22 - Mitch Williams <mitch.a.williams at intel.com>
35 the original tools from extreme-linux and beowulf sites will not work
119 -----------------------------------------------
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/Documentation/dev-tools/
Dcheckpatch.rst1 .. SPDX-License-Identifier: GPL-2.0-only
27 - -q, --quiet
31 - -v, --verbose
35 - --no-tree
39 - --no-signoff
41 Disable the 'Signed-off-by' line check. The sign-off is a simple line at
43 or otherwise have the right to pass it on as an open-source patch.
47 Signed-off-by: Random J Developer <random@developer.example.org>
49 Setting this flag effectively stops a message for a missing signed-off-by
52 - --patch
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/Documentation/sound/kernel-api/
Dwriting-an-alsa-driver.rst11 Architecture) <http://www.alsa-project.org/>`__ driver. The document
19 low-level driver implementation details. It only describes the standard
26 -------
56 --------------
60 sub-directories contain different modules and are dependent upon the
74 This directory and its sub-directories are for the ALSA sequencer. This
76 as snd-seq-midi, snd-seq-virmidi, etc. They are compiled only when
85 -----------------
88 to be exported to user-space, or included by several files in different
94 -----------------
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