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/Documentation/core-api/
Dmemory-allocation.rst15 memory should be allocated. The GFP acronym stands for "get free
61 ``GFP_HIGHUSER_MOVABLE`` does not require that allocated memory
65 ``GFP_HIGHUSER`` means that the allocated memory is not movable,
70 ``GFP_USER`` means that the allocated memory is not movable and it
82 used to ensure that the allocated memory is accessible by hardware
142 The maximal size of a chunk that can be allocated with `kmalloc` is
147 The address of a chunk allocated with `kmalloc` is aligned to at least
153 Chunks allocated with kmalloc() can be resized with krealloc(). Similarly
158 request pages from the page allocator. The memory allocated by `vmalloc`
176 When the allocated memory is no longer needed it must be freed.
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Dswiotlb.rst67 multiple memory buffer segments, a separate bounce buffer must be allocated for
89 pre-allocated at boot time (but see Dynamic swiotlb below). Because swiotlb
91 allocated as a single contiguous block.
97 this pre-allocated memory is not available for other uses in the system. The
131 Hence there may be pre-padding space that is allocated prior to the start of
137 allocated entirely from granules that are not used for any other purpose.
141 Memory used for swiotlb bounce buffers is allocated from overall system memory
142 as one or more "pools". The default pool is allocated during system boot with a
146 CONFIG_SWIOTLB_DYNAMIC is enabled, additional pools may be allocated later in
148 memory. The default pool is allocated below the 4 GiB physical address line so
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Didr.rst27 for statically allocated IDRs or idr_init() for dynamically
28 allocated IDRs.
61 IDs currently allocated.
/Documentation/mm/
Dpage_owner.rst2 page owner: Tracking about who allocated each page
8 page owner is for the tracking about who allocated each page.
28 allocated base pages, which gives us a quick overview of where the memory
52 memory system, so, until initialization, many pages can be allocated and
53 they would have no owner information. To fix it up, these early allocated
54 pages are investigated and marked as allocated in initialization phase.
56 at least, we can tell whether the page is allocated or not,
57 more accurately. On 2GB memory x86-64 VM box, 13343 early allocated pages
58 are caught and marked, although they are mostly allocated from struct
124 Page allocated via order XXX, ...
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Dvmalloced-kernel-stacks.rst76 allocated data.
86 When a new kernel thread is created, a thread stack is allocated from
94 - Allocated stacks are cached and later reused by new threads, so memcg
107 the code base to understand when and how a thread stack is allocated.
112 stack_vm_area pointer in task_struct keeps track of the virtually allocated
/Documentation/userspace-api/media/dvb/
Ddmx-reqbufs.rst38 Memory mapped buffers are located in device memory and must be allocated
40 space. User buffers are allocated by applications themselves, and this
43 allocated by applications through a device driver, and this ioctl only
54 number allocated in the ``count`` field. The ``count`` can be smaller than the number requested, ev…
56 function correctly. The actual allocated buffer size can is returned
Ddmx-querybuf.rst38 been allocated with the :ref:`DMX_REQBUFS` ioctl.
41 to the number of buffers allocated with :ref:`DMX_REQBUFS`
/Documentation/gpu/
Dxen-front.rst15 Buffers allocated by the frontend driver
19 :doc: Buffers allocated by the frontend driver
21 Buffers allocated by the backend
25 :doc: Buffers allocated by the backend
/Documentation/devicetree/bindings/dma/stm32/
Dst,stm32-dma3.yaml76 -bit 1: The source allocated port
77 0x0: port 0 is allocated to the source transfer
78 0x1: port 1 is allocated to the source transfer
82 -bit 5: The destination allocated port
83 0x0: port 0 is allocated to the destination transfer
84 0x1: port 1 is allocated to the destination transfer
/Documentation/core-api/irq/
Dirq-domain.rst76 be allocated.
99 hwirq number. When a hwirq is mapped, an irq_desc is allocated for
105 allocated for in-use IRQs. The disadvantage is that the table must be
124 IRQs. When an hwirq is mapped, an irq_desc is allocated and the
168 range of irq_descs allocated for the hwirqs. It is used when the
181 been allocated for the controller and that the IRQ number can be
185 allocated for every hwirq, even if it is unused.
196 descriptors will be allocated on-the-fly for it, and if no range is
198 irq_domain_create_linear() which means *no* irq descriptors will be allocated.
204 used and no descriptor gets allocated it is very important to make sure
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/Documentation/trace/
Devents-kmem.rst42 of writing, no information is available on what slab is being allocated from,
55 a simple indicator of page allocator activity. Pages may be allocated from
58 If pages are allocated directly from the buddy allocator, the
85 When a per-CPU list is empty or pages of the wrong type are allocated,
87 triggered is mm_page_alloc_zone_locked for each page allocated with the
101 can be allocated and freed on the same CPU through some algorithm change.
/Documentation/devicetree/bindings/tpm/
Dtpm-common.yaml25 base address of reserved memory allocated for firmware event log
30 size of reserved memory allocated for firmware event log
34 description: reserved memory allocated for firmware event log
/Documentation/devicetree/bindings/dma/
Dsnps,dma-spear1340.yaml32 for transfers on dynamically allocated channel. Fourth cell is the
33 peripheral master identifier for transfers on an allocated channel. Fifth
34 cell is an optional mask of the DMA channels permitted to be allocated
75 (first free allocated), while one - descending (last free allocated).
/Documentation/ABI/testing/
Ddell-smbios-wmi27 determined above and allocated.
41 8) Be sure to free up your allocated object.
/Documentation/userspace-api/media/v4l/
Dvidioc-reqbufs.rst36 Memory mapped buffers are located in device memory and must be allocated
38 space. User buffers are allocated by applications themselves, and this
41 allocated by applications through a device driver, and this ioctl only
52 allocated in the ``count`` field. It can be smaller than the number
107 free any previously allocated buffers, so this is typically something
181 - A buffer is allocated either in coherent (it will be automatically
/Documentation/devicetree/bindings/powerpc/fsl/
Ddcsr.txt57 This node represents the region of DCSR space allocated to the EPU
107 This node represents the region of DCSR space allocated to the NPC
144 This node represents the region of DCSR space allocated to the NXC
168 This node represents the region of DCSR space allocated to
202 This node represents the region of DCSR space allocated to
231 This node represents the region of DCSR space allocated to
259 This node represents the region of DCSR space allocated to
291 This node represents the region of DCSR space allocated to
320 This node represents the region of DCSR space allocated to
349 This node represents the region of DCSR space allocated to
/Documentation/admin-guide/mm/
Dnuma_memory_policy.rst18 memory may be allocated by a set of processes. Memory policies are a
67 A task policy applies only to pages allocated after the policy is
69 changes its task policy remain where they were allocated based on
70 the policy at the time they were allocated.
91 pages allocated for anonymous segments, such as the task
97 an anonymous page is allocated on an attempt to write to the
114 * By default, VMA policy applies only to pages allocated after
116 VMA range remain where they were allocated based on the
117 policy at the time they were allocated. However, since
131 the object share the policy, and all pages allocated for the
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Dhugetlbpage.rst49 allocated.
93 Once a number of huge pages have been pre-allocated to the kernel huge page
137 will result in 256 2M huge pages being allocated and a warning message
162 will all result in 256 2M huge pages being allocated. Valid default
169 indicates the current number of pre-allocated huge pages of the default size.
199 actually allocated by checking the sysctl or meminfo. To check the per node
214 huge pages will be allocated, if necessary and if possible, to fulfill
230 no more surplus huge pages will be allowed to be allocated.
287 Whether huge pages are allocated and freed via the ``/proc`` interface or
289 NUMA nodes from which huge pages are allocated or freed are controlled by the
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/Documentation/dev-tools/
Dkmemleak.rst37 Note that the orphan objects are listed in the order they were allocated
69 Memory may be allocated or freed before kmemleak is initialised and
90 An allocated block of memory is considered orphan if no pointer to its
93 might be no way for the kernel to pass the address of the allocated
111 Some allocated memory blocks have pointers stored in the kernel's
216 members in the allocated structures. This feature would solve many of
219 The tool can report false positives. These are cases where an allocated
/Documentation/filesystems/ext4/
Dverity.rst15 actually be allocated on-disk, i.e. it may be a hole.
40 Verity files cannot have blocks allocated past the end of the verity
/Documentation/usb/
Ddwc3.rst19 endpoint. The interrupt numbers are allocated during probe and belong
22 - interrupts are requested / allocated on usb_ep_enable() and removed on
/Documentation/devicetree/bindings/interrupt-controller/
Dloongson,pch-msi.yaml26 u32 value of the base of parent HyperTransport vector allocated
34 u32 value of the number of parent HyperTransport vectors allocated
/Documentation/livepatch/
Dshadow-vars.rst7 allocated separately from parent data structures, which are left
46 to do actions that can be done only once when a new variable is allocated.
113 structure is typically allocated, initialized, then registered in some
119 For commit 1d147bfa6429, when a parent sta_info structure is allocated,
209 structure was allocated by new, livepatched code. In this case, it
/Documentation/translations/zh_CN/mm/
Dpage_owner.rst68 Page allocated via order XXX, ...
72 Page allocated via order XXX, ...
86 Page allocated via order XXX, ...
/Documentation/scsi/
Dhptiop.rst111 A request packet can be allocated in either IOP or host memory.
121 Requests allocated in host memory must be aligned on 32-bytes boundary.
126 allocated in IOP memory, write the offset to inbound queue port. For
127 requests allocated in host memory, write (0x80000000|(bus_addr>>5))
134 For requests allocated in IOP memory, the request offset is posted to
137 For requests allocated in host memory, (0x80000000|(bus_addr>>5))
144 For requests allocated in IOP memory, the host driver free the request
161 Requests allocated in host memory must be aligned on 32-bytes boundary.

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