| /linux/Documentation/admin-guide/ |
| H A D | cgroup-v2.rst | 1 .. _cgroup-v2:
11 conventions of cgroup v2. It describes all userland-visible aspects
14 v1 is available under :ref:`Documentation/admin-guide/cgroup-v1/index.rst <cgroup-v1>`.
22 1-1. Terminology
23 1-2. What is cgroup?
25 2-1. Mounting
26 2-2. Organizing Processes and Threads
27 2-2-1. Processes
28 2-2-2. Threads
29 2-3. [Un]populated Notification
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| /linux/Documentation/devicetree/bindings/net/ |
| H A D | davicom,dm9051.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Joseph CHANG <josright123@gmail.com>
13 The DM9051 is a fully integrated and cost-effective low pin count single
17 - $ref: ethernet-controller.yaml#
26 spi-max-frequency:
32 local-mac-address: true
34 mac-address: true
37 - compatible
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| /linux/include/linux/ |
| H A D | energy_model.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
15 * struct em_perf_state - Performance state of a performance domain
20 * @cost: The cost coefficient associated with this level, used during
28 unsigned long cost; member
37 * but a lower or equal power cost. Such inefficient states are ignored when
43 * struct em_perf_table - Performance states table
55 * struct em_perf_domain - Performance domain
68 * must have the same micro-architecture. Performance domains often have
69 * a 1-to-1 mapping with CPUFreq policies. In case of other devices the @cpus
84 * EM_PERF_DOMAIN_MICROWATTS: The power values are in micro-Watts or some
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| H A D | gfp_types.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
10 * typedef gfp_t - Memory allocation flags.
23 * include/trace/events/mmflags.h and tools/perf/builtin-kmem.c
108 * Physical address zone modifiers (see linux/mmzone.h - low four bits)
124 * ---------------------------------
159 * Watermark modifiers -- controls access to emergency reserves
160 * ------------------------------------------------------------
162 * %__GFP_HIGH indicates that the caller is high-priority and that granting
170 * be the MM or co-ordinating closely with the VM (e.g. swap over NFS).
174 * Usage of a pre-allocated pool (e.g. mempool) should be always considered
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| H A D | zstd_lib.h | 1 /* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause */
6 * This source code is licensed under both the BSD-style license (found in the
9 * You may select, at your option, one of the above-listed licenses.
40 * typically with -Wno-deprecated-declarations for gcc or _CRT_SECURE_NO_WARNINGS in Visual.
61 real-time compression scenarios at zlib-level and better compression ratios.
62 The zstd compression library provides in-memory compression and decompression
66 which is currently 22. Levels >= 20, labeled `--ultra`, should be used with
69 The lower the level, the faster the speed (at the cost of compression).
72 - a single step (described as Simple API)
73 - a single step, reusing a context (described as Explicit context)
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| /linux/arch/powerpc/include/asm/ |
| H A D | page.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
16 #include <asm/asm-const.h>
38 #define HPAGE_MASK (~(HPAGE_SIZE - 1))
39 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
40 #define HUGE_MAX_HSTATE (MMU_PAGE_COUNT-1)
59 * KERNELBASE - PAGE_OFFSET = PHYSICAL_START - MEMORY_START
64 * va = pa + PAGE_OFFSET - MEMORY_START
65 * va = pa + KERNELBASE - PHYSICAL_START
75 #define LOAD_OFFSET ASM_CONST((CONFIG_KERNEL_START-CONFIG_PHYSICAL_START))
99 #define VIRT_PHYS_OFFSET (KERNELBASE - PHYSICAL_START)
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| /linux/Documentation/scheduler/ |
| H A D | sched-util-clamp.rst | 1 .. SPDX-License-Identifier: GPL-2.0
57 foreground, top-app, etc. Util clamp can be used to constrain how much
60 the ones belonging to the currently active app (top-app group). Beside this
65 1. The big cores are free to run top-app tasks immediately. top-app
106 Note that by design RT tasks don't have per-task PELT signal and must always
110 when an RT task wakes up. This cost is unchanged by using uclamp. Uclamp only
114 See :ref:`section 3.4 <uclamp-default-values>` for default values and
115 :ref:`3.4.1 <sched-util-clamp-min-rt-default>` on how to change RT tasks
132 frequency selection as well as task placement to be most effective. Both of
150 task on the rq to only a subset of tasks on the top-most bucket.
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| /linux/drivers/iommu/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
2 # The IOVA library may also be used by non-IOMMU_API users
40 sizes at both stage-1 and stage-2, as well as address spaces
41 up to 48-bits in size.
47 Enable self-tests for LPAE page table allocator. This performs
48 a series of page-table consistency checks during boot.
57 Enable support for the ARM Short-descriptor pagetable format.
58 This supports 32-bit virtual and physical addresses mapped using
59 2-level tables with 4KB pages/1MB sections, and contiguous entries
66 Enable self-tests for ARMv7s page table allocator. This performs
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| /linux/Documentation/networking/ |
| H A D | msg_zerocopy.rst | 15 -----------------------
23 it replaces per byte copy cost with page accounting and completion
25 effective at writes over around 10 KB.
40 ---------
43 netdev 2.1. For more in-depth information see that paper and talk,
53 [PATCH net-next v4 0/9] socket sendmsg MSG_ZEROCOPY
54 https://lore.kernel.org/netdev/20170803202945.70750-1-willemdebruijn.kernel@gmail.com
64 ------------
77 ------------
86 A zerocopy failure will return -1 with errno ENOBUFS. This happens if
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| /linux/Documentation/admin-guide/pm/ |
| H A 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
66 -----------
69 hardware-managed P-states (HWP) support. If it works in this mode, the
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| /linux/mm/ |
| H A D | swap.c | 1 // SPDX-License-Identifier: GPL-2.0-only
10 * Linux VM subsystem. Fine-tuning documentation can be found in
11 * Documentation/admin-guide/sysctl/vm.rst.
32 #include <linux/backing-dev.h>
84 * This path almost never happens for VM activity - pages are normally freed
85 * in batches. But it gets used by networking - and for compound pages.
112 free_frozen_pages(&folio->page, folio_order(folio)); in __folio_put()
143 * folio->mlock_count = !!folio_test_mlocked(folio)? in lru_add()
149 folio->mlock_count = 0; in lru_add()
165 struct folio *folio = fbatch->folios[i]; in folio_batch_move_lru()
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| /linux/LICENSES/dual/ |
| H A D | CDDL-1.0 | 1 Valid-License-Identifier: CDDL-1.0
2 SPDX-URL: https://spdx.org/licenses/CDDL-1.0.html
3 Usage-Guide:
4 Do NOT use. The CDDL-1.0 is not GPL2 compatible. It may only be used for
5 dual-licensed files where the other license is GPL2 compatible.
11 SPDX-License-Identifier: ($GPL-COMPATIBLE-ID OR CDDL-1.0)
13 License-Text:
90 hereby grants You a world-wide, royalty-free, non-exclusive
106 effective on the date Initial Developer first distributes
121 hereby grants You a world-wide, royalty-free, non-exclusive
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| H A D | MPL-1.1 | 1 Valid-License-Identifier: MPL-1.1
2 SPDX-URL: https://spdx.org/licenses/MPL-1.1.html
3 Usage-Guide:
4 Do NOT use. The MPL-1.1 is not GPL2 compatible. It may only be used for
5 dual-licensed files where the other license is GPL2 compatible.
11 SPDX-License-Identifier: MPL-1.1
12 License-Text:
17 ---------------
81 appropriate decompression or de-archiving software is widely available
98 The Initial Developer hereby grants You a world-wide, royalty-free,
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| /linux/block/ |
| H A D | blk-iocost.c | 1 /* SPDX-License-Identifier: GPL-2.0
3 * IO cost model based controller.
10 * observable cost metric. This is distinguished from CPU and memory where
17 * useless for the purpose of IO capacity distribution. While on-device
19 * non-queued rotational devices, this is no longer viable with modern
22 * While there is no cost metric we can trivially observe, it isn't a
23 * complete mystery. For example, on a rotational device, seek cost
27 * implement a reasonable work-conserving proportional IO resource
30 * 1. IO Cost Model
32 * IO cost model estimates the cost of an IO given its basic parameters and
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| /linux/rust/kernel/ |
| H A D | task.rs | 1 // SPDX-License-Identifier: GPL-2.0
63 /// The following is an example of getting the PID of the current thread with zero additional cost
70 /// Getting the PID of the current process, also zero additional cost:
88 /// fn new() -> Self {
113 /// For example, to retrieve the pid-namespace of a task, you must use rcu protection unless it is
127 /// Other operations temporarily create a new sub-context:
143 fn deref(&self) -> &Task { in deref()
162 pub fn current_raw() -> *mu in current_raw()
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| /linux/kernel/bpf/ |
| H A D | cgroup.c | 1 // SPDX-License-Identifier: GPL-2.0-only
16 #include <linux/bpf-cgroup.h>
22 #include "../cgroup/cgroup-internal.h"
76 array = rcu_dereference(cgrp->effective[atype]); in bpf_prog_run_array_cg()
77 item = &array->items[0]; in bpf_prog_run_array_cg()
79 while ((prog = READ_ONCE(item->pro in bpf_prog_run_array_cg()
1220 struct bpf_prog_array *effective; __cgroup_bpf_query() local
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| /linux/arch/powerpc/kvm/ |
| H A D | book3s_64_entry.S | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 #include <asm/asm-offsets.h>
5 #include <asm/code-patching-asm.h>
6 #include <asm/exception-64s.h>
13 #include <asm/ultravisor-api.h>
16 * These are branched to from interrupt handlers in exception-64s.S which set
17 * IKVM_REAL or IKVM_VIRT, if HSTATE_IN_GUEST was found to be non-zero.
24 * This may also be a syscall from PR-KVM userspace that is to be
28 * and CR0, so PR-KVM can not support a guest kernel that preserves
53 * guest R9-R13, CTR, CFAR, PPR saved in PACA EX_xxx save area
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| /linux/Documentation/admin-guide/sysctl/ |
| H A D | vm.rst | 13 ------------------------------------------------------------------------------
27 - admin_reserve_kbytes
28 - compact_memory
29 - compaction_proactiveness
30 - compact_unevictable_allowed
31 - defrag_mode
32 - dirty_background_bytes
33 - dirty_background_ratio
34 - dirty_bytes
35 - dirty_expire_centisecs
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| /linux/init/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
8 - Re-run Kconfig when the compiler is updated
13 - Ensure full rebuild when the compiler is updated
14 include/linux/compiler-version.h contains this option in the comment
16 auto-generated dependency. When the compiler is updated, syncconfig
20 def_bool $(success,test "$(cc-name)" = GCC)
24 default $(cc-version) if CC_IS_GCC
28 def_bool $(success,test "$(cc-name)" = Clang)
32 default $(cc-version) if CC_IS_CLANG
36 def_bool $(success,test "$(as-name)" = GNU)
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| /linux/tools/include/linux/ |
| H A D | gfp_types.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
10 * typedef gfp_t - Memory allocation flags.
23 * include/trace/events/mmflags.h and tools/perf/builtin-kmem.c
108 * Physical address zone modifiers (see linux/mmzone.h - low four bits)
124 * ---------------------------------
159 * Watermark modifiers -- controls access to emergency reserves
160 * ------------------------------------------------------------
162 * %__GFP_HIGH indicates that the caller is high-priority and that granting
170 * be the MM or co-ordinating closely with the VM (e.g. swap over NFS).
174 * Usage of a pre-allocated pool (e.g. mempool) should be always considered
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| /linux/kernel/cgroup/ |
| H A D | cpuset.c | 7 * Copyright (C) 2004-2007 Silicon Graphics, Inc.
11 * sysfs is Copyright (c) 2001-3 Patrick Mochel
13 * 2003-10-10 Written by Simon Derr.
14 * 2003-10-22 Updates by Stephen Hemminger.
15 * 2004 May-July Rework by Paul Jackson.
24 #include "cpuset-internal.h"
50 * node binding, add this key to provide a quick low-cost judgment
74 * Exclusive CPUs distributed out to local or remote sub-partitions of
96 * - update_partition_sd_lb()
97 * - update_cpumasks_hier()
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-fs-f2fs | 26 gc_idle = 1 will select the Cost Benefit approach & setting
28 gc_idle = 3 will select the age-threshold based approach.
49 Description: Controls the in-place-update policy.
75 Description: Controls the FS utilization condition for the in-place-update
81 Description: Controls the dirty page count condition for the in-place-update
120 faster, at the cost of higher latency for incoming I/O.
257 Supported on-disk features:
314 little bit aggressively. always uses cost benefit GC approach,
315 and will override age-threshold GC approach if ATGC is enabled
319 always uses cost benefit GC approach, and will override
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| /linux/Documentation/userspace-api/ |
| H A D | dma-buf-alloc-exchange.rst | 1 .. SPDX-License-Identifier: GPL-2.0
2 .. Copyright 2021-2023 Collabora Ltd.
9 support for sharing pixel-buffer allocations between processes, devices, and
12 approach this sharing for two-dimensional image data.
25 Conceptually a two-dimensional array of pixels. The pixels may be stored
30 A span along a single y-axis value, e.g. from co-ordinates (0,100) to
37 A span along a single x-axis value, e.g. from co-ordinates (100,0) to
46 A two-dimensional array of some or all of an image's color and alpha
80 A value that denotes the relationship between pixel-location co-ordinates
81 and byte-offset values. Typically used as the byte offset between two
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| /linux/drivers/media/pci/tw5864/ |
| H A D | tw5864-reg.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * TW5864 driver - registers description
8 /* According to TW5864_datasheet_0.6d.pdf, tw5864b1-ds.pdf */
10 /* Register Description - Direct Map Space */
11 /* 0x0000 ~ 0x1ffc - H264 Register Map */
76 * 0->3 4 VLC data buffer in DDR (1M each)
77 * 0->7 8 VLC data buffer in DDR (512k each)
147 /* DDR-DPR Burst Read Enable */
157 * 0 Single R/W Access (Host <-> DDR)
158 * 1 Burst R/W Access (Host <-> DPR)
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| /linux/drivers/cpufreq/ |
| H A D | intel_pstate.c | 1 // SPDX-License-Identifier: GPL-2.0-only
38 #include <asm/intel-family.h>
56 #define ONE_EIGHTH_FP ((int64_t)1 << (FRAC_BITS - 3))
78 mask = (1 << FRAC_BITS) - 1; in ceiling_fp()
95 * struct sample - Store performance sample
122 * struct pstate_data - Store P state data
129 * @perf_ctl_scaling: PERF_CTL P-state to frequency scaling factor
152 * struct vid_data - Stores voltage information data
157 * @ratio: Ratio of (vid max - vid min) /
158 * (max P state - Min P State)
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