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| /Documentation/devicetree/bindings/riscv/ |
| D | cpus.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR MIT)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: RISC-V bindings for 'cpus' DT nodes
10 - Paul Walmsley <paul.walmsley@sifive.com>
11 - Palmer Dabbelt <palmer@sifive.com>
14 This document uses some terminology common to the RISC-V community
18 mandated by the RISC-V ISA: a PC and some registers. This
28 - items:
29 - enum:
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| /Documentation/networking/ |
| D | pktgen.txt | 4 ------------------------------------
6 Enable CONFIG_NET_PKTGEN to compile and build pktgen either in-kernel
29 overload type of benchmarking, as this could hurt the normal use-case.
32 # ethtool -G ethX tx 1024
36 than the CPU's L1/L2 cache, 2) because it allows more queueing in the
41 ring-buffers for various performance reasons, and packets stalling
46 and the cleanup interval is affected by the ethtool --coalesce setting
47 of parameter "rx-usecs".
50 # ethtool -C ethX rx-usecs 30
67 * add_device DEVICE@NAME -- adds a single device
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| D | ip-sysctl.txt | 3 ip_forward - BOOLEAN
4 0 - disabled (default)
5 not 0 - enabled
13 ip_default_ttl - INTEGER
18 ip_no_pmtu_disc - INTEGER
20 fragmentation-required ICMP is received, the PMTU to this
30 accept fragmentation-needed errors if the underlying protocol
40 Possible values: 0-3
43 min_pmtu - INTEGER
44 default 552 - minimum discovered Path MTU
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| /Documentation/filesystems/ |
| D | affs.txt | 15 in file names are case-insensitive, as they ought to be.
20 DOS\4 The original filesystem with directory cache. The directory
21 cache speeds up directory accesses on floppies considerably,
25 DOS\5 The Fast File System with directory cache. Supported read only.
41 setuid[=uid] This sets the owner of all files and directories in the file
46 mode=mode Sets the mode flags to the given (octal) value, regardless
56 reserved=num Sets the number of reserved blocks at the start of the
60 root=block Sets the block number of the root block. This should never
63 bs=blksize Sets the blocksize to blksize. Valid block sizes are 512,
90 Amiga -> Linux:
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| D | coda.txt | 3 Coda -- this document describes the client kernel-Venus interface.
10 To run Coda you need to get a user level cache manager for the client,
29 level filesystem code needed for the operation of the Coda file sys-
152 A key component in the Coda Distributed File System is the cache
160 client cache and makes remote procedure calls to Coda file servers and
179 leads to an almost natural environment for implementing a kernel-level
199 …l_o_s_e_, _c_r_e_a_t_e_, _m_k_d_i_r_, _r_m_d_i_r_, _c_h_m_o_d in a Unix
209 pre-processing, the VFS starts invoking exported routines in the FS
221 offered by the cache manager Venus. When the replies from Venus have
243 requesting detailed information about the persistent cache managed by
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| D | gfs2-glocks.txt | 2 ------------------------------
10 2. A non-blocking bit lock, GLF_LOCK, which is used to prevent other
28 ------------------------------
37 with cache management. The following rules apply for the cache:
39 Glock mode | Cache data | Cache Metadata | Dirty Data | Dirty Metadata
40 --------------------------------------------------------------------------
53 ----------------------------------------------------------------------------
55 go_xmote_bh | Called after remote state change (e.g. to refill cache)
56 go_inval | Called if remote state change requires invalidating the cache
86 -------------------------------------------------------------------------
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| D | f2fs.txt | 2 WHAT IS Flash-Friendly File System (F2FS)?
5 NAND flash memory-based storage devices, such as SSD, eMMC, and SD cards, have
11 F2FS is a file system exploiting NAND flash memory-based storage devices, which
12 is based on Log-structured File System (LFS). The design has been focused on
16 Since a NAND flash memory-based storage device shows different characteristic
18 F2FS and its tools support various parameters not only for configuring on-disk
23 >> git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git
26 >> linux-f2fs-devel@lists.sourceforge.net
32 Log-structured File System (LFS)
33 --------------------------------
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| D | fsverity.rst | 1 .. SPDX-License-Identifier: GPL-2.0
6 fs-verity: read-only file-based authenticity protection
12 fs-verity (``fs/verity/``) is a support layer that filesystems can
14 of read-only files. Currently, it is supported by the ext4 and f2fs
15 filesystems. Like fscrypt, not too much filesystem-specific code is
16 needed to support fs-verity.
18 fs-verity is similar to `dm-verity
19 <https://www.kernel.org/doc/Documentation/device-mapper/verity.txt>`_
21 filesystems supporting fs-verity, userspace can execute an ioctl that
23 it to a filesystem-specific location associated with the file.
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| /Documentation/admin-guide/ |
| D | bcache.rst | 2 A block layer cache (bcache)
6 nice if you could use them as cache... Hence bcache.
10 - http://bcache.evilpiepirate.org
11 - http://evilpiepirate.org/git/linux-bcache.git
12 - http://evilpiepirate.org/git/bcache-tools.git
14 It's designed around the performance characteristics of SSDs - it only allocates
22 great lengths to protect your data - it reliably handles unclean shutdown. (It
26 Writeback caching can use most of the cache for buffering writes - writing
33 average is above the cutoff it will skip all IO from that task - instead of
35 thus entirely bypass the cache.
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| D | md.rst | 5 ---------------------------------
24 md=d<md device no.>,dev0,dev1,...,devn
49 -1 linear mode
58 (raid-0 and raid-1 only)
78 --------------------------------------
87 that all auto-detected arrays are assembled as partitionable.
90 -------------------------------------------
102 mdadm --assemble --force ....
112 md-mod.start_dirty_degraded=1
116 ------------------
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| D | kernel-parameters.txt | 5 force -- enable ACPI if default was off
6 on -- enable ACPI but allow fallback to DT [arm64]
7 off -- disable ACPI if default was on
8 noirq -- do not use ACPI for IRQ routing
9 strict -- Be less tolerant of platforms that are not
11 rsdt -- prefer RSDT over (default) XSDT
12 copy_dsdt -- copy DSDT to memory
56 Documentation/firmware-guide/acpi/debug.rst for more information about
119 Disable auto-serialization of AML methods
122 auto-serialization feature.
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| /Documentation/vm/ |
| D | slub.rst | 20 slabs that have data in them. See "slabinfo -h" for more options when
24 gcc -o slabinfo tools/vm/slabinfo.c
32 -------------------------------------------
37 slub_debug=<Debug-Options>
40 slub_debug=<Debug-Options>,<slab name1>,<slab name2>,...
52 A Toggle failslab filter mark for the cache
55 - Switch all debugging off (useful if the kernel is
62 Trying to find an issue in the dentry cache? Try::
66 to only enable debugging on the dentry cache. You may use an asterisk at the
68 example, here's how you can poison the dentry cache as well as all kmalloc
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| D | frontswap.rst | 9 swapped pages are saved in RAM (or a RAM-like device) instead of a swap disk.
11 (Note, frontswap -- and :ref:`cleancache` (merged at 3.0) -- are the "frontends"
13 all other supporting code -- the "backends" -- is implemented as drivers.
21 a synchronous concurrency-safe page-oriented "pseudo-RAM device" conforming
23 in-kernel compressed memory, aka "zcache", or future RAM-like devices);
24 this pseudo-RAM device is not directly accessible or addressable by the
25 kernel and is of unknown and possibly time-varying size. The driver
49 cache" by calling frontswap_writethrough(). In this mode, the reduction
50 in swap device writes is lost (and also a non-trivial performance advantage)
88 useful for write-balancing for some RAM-like devices). Swap pages (and
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| /Documentation/admin-guide/blockdev/ |
| D | floppy.rst | 19 Example: If your kernel is called linux-2.6.9, type the following line
22 linux-2.6.9 floppy=thinkpad
25 of linux-2.6.9::
31 linux-2.6.9 floppy=daring floppy=two_fdc
56 in a configuration file in /etc/modprobe.d/.
62 Sets the bit mask to allow only units 0 and 1. (default)
96 and is thus harder to find, whereas non-dma buffers may be
104 If you have a FIFO-able FDC, the floppy driver automatically
105 falls back on non DMA mode if no DMA-able memory can be found.
121 Sets the FIFO threshold. This is mostly relevant in DMA
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| D | ramdisk.rst | 9 3) Using "rdev -r"
14 -----------
18 in order to access the root filesystem (see Documentation/admin-guide/initrd.rst). It can
23 RAM from the buffer cache. The driver marks the buffers it is using as dirty
41 ---------------------------------
62 3) Using "rdev -r"
63 ------------------
65 The usage of the word (two bytes) that "rdev -r" sets in the kernel image is
66 as follows. The low 11 bits (0 -> 10) specify an offset (in 1 k blocks) of up
97 /usr/src/linux# rdev -r /dev/fd0 49152
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| /Documentation/admin-guide/mm/ |
| D | numa_memory_policy.rst | 12 supported platforms with Non-Uniform Memory Access architectures since 2.4.?.
18 (``Documentation/admin-guide/cgroup-v1/cpusets.rst``)
21 programming interface that a NUMA-aware application can take advantage of. When
30 ------------------------
43 not to overload the initial boot node with boot-time
47 this is an optional, per-task policy. When defined for a
57 to establish the task policy for a child task exec()'d from an
63 In a multi-threaded task, task policies apply only to the thread
100 mapping-- i.e., at Copy-On-Write.
103 virtual address space--a.k.a. threads--independent of when
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| /Documentation/sound/cards/ |
| D | audigy-mixer.rst | 5 This is based on sb-live-mixer.rst.
20 functionality. Only the default build-in code in the ALSA driver is described
34 one-way three wire serial bus for digital sound by Philips Semiconductors
42 FX-bus
48 ----------------------------------------
49 This control is used to attenuate samples for left and right front PCM FX-bus
55 -------------------------------------------
56 This control is used to attenuate samples for left and right surround PCM FX-bus
62 -----------------------------------------
63 This control is used to attenuate samples for center PCM FX-bus accumulator.
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| D | sb-live-mixer.rst | 19 (index 0) for a given card) allows to forward 48kHz, stereo, 16-bit
22 to 8 raw PCM devices operating at 48kHz, 16-bit little endian. It would
24 but the conversion routines exist only for stereo (2-channel streams)
34 functionality. Only the default build-in code in the ALSA driver is described
48 one-way three wire serial bus for digital sound by Philips Semiconductors
56 FX-bus
63 ---------------------------------------
64 This control is used to attenuate samples for left and right PCM FX-bus
69 ------------------------------------------------
70 This control is used to attenuate samples for left and right PCM FX-bus
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| /Documentation/admin-guide/cgroup-v1/ |
| D | memory.rst | 18 we call it "memory cgroup". When you see git-log and source code, you'll
30 Memory-hungry applications can be isolated and limited to a smaller
36 d. A CD/DVD burner could control the amount of memory used by the
42 Current Status: linux-2.6.34-mmotm(development version of 2010/April)
46 - accounting anonymous pages, file caches, swap caches usage and limiting them.
47 - pages are linked to per-memcg LRU exclusively, and there is no global LRU.
48 - optionally, memory+swap usage can be accounted and limited.
49 - hierarchical accounting
50 - soft limit
51 - moving (recharging) account at moving a task is selectable.
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| /Documentation/admin-guide/device-mapper/ |
| D | dm-raid.rst | 2 dm-raid
5 The device-mapper RAID (dm-raid) target provides a bridge from DM to MD.
6 It allows the MD RAID drivers to be accessed using a device-mapper
11 -----------------------
26 - Transitory layout
29 - rotating parity 0 with data continuation
32 - rotating parity N with data continuation
35 - rotating parity 0 with data restart
38 - rotating parity N with data restart
41 - rotating parity zero (left-to-right) with data restart
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| /Documentation/trace/ |
| D | ftrace.rst | 2 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 :doc:`ftrace-design` for details for arch porters and such.
47 ---------------
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| /Documentation/ |
| D | DMA-API-HOWTO.txt | 10 with example pseudo-code. For a concise description of the API, see
11 DMA-API.txt.
39 supports 64-bit addresses for main memory and PCI BARs, it may use an IOMMU
40 so devices only need to use 32-bit DMA addresses.
49 +-------+ +------+ +------+
52 C +-------+ --------> B +------+ ----------> +------+ A
54 +-----+ | | | | bridge | | +--------+
55 | | | | +------+ | | | |
58 +-----+ +-------+ +------+ +------+ +--------+
60 X +-------+ --------> Y +------+ <---------- +------+ Z
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| /Documentation/block/ |
| D | biodoc.rst | 13 - Jens Axboe <jens.axboe@oracle.com>
14 - Suparna Bhattacharya <suparna@in.ibm.com>
19 - Nick Piggin <npiggin@kernel.dk>
34 - Jens Axboe <jens.axboe@oracle.com>
43 - Christoph Hellwig <hch@infradead.org>
44 - Arjan van de Ven <arjanv@redhat.com>
45 - Randy Dunlap <rdunlap@xenotime.net>
46 - Andre Hedrick <andre@linux-ide.org>
49 while it was still work-in-progress:
51 - David S. Miller <davem@redhat.com>
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| /Documentation/admin-guide/sysctl/ |
| D | kernel.rst | 13 ------------------------------------------------------------------------------
27 - acct
28 - acpi_video_flags
29 - auto_msgmni
30 - bootloader_type [ X86 only ]
31 - bootloader_version [ X86 only ]
32 - cap_last_cap
33 - core_pattern
34 - core_pipe_limit
35 - core_uses_pid
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| /Documentation/media/uapi/dvb/ |
| D | fe_property_parameters.rst | 4 .. Foundation, with no Invariant Sections, no Front-Cover Texts
5 .. and no Back-Cover Texts. A copy of the license is included at
6 .. Documentation/media/uapi/fdl-appendix.rst.
8 .. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
22 .. _DTV-UNDEFINED:
31 .. _DTV-TUNE:
36 Interpret the cache of data, build either a traditional frontend
40 .. _DTV-CLEAR:
45 Reset a cache of data specific to the frontend here. This does not
49 .. _DTV-FREQUENCY:
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