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/Linux-v6.6/drivers/acpi/acpica/
Duttrack.c4 * Module Name: uttrack - Memory allocation tracking routines (debug only)
14 * Each memory allocation is tracked via a doubly linked list. Each
32 *allocation);
80 * PARAMETERS: size - Size of the allocation
94 struct acpi_debug_mem_block *allocation; in acpi_ut_allocate_and_track() local
105 allocation = in acpi_ut_allocate_and_track()
107 if (!allocation) { in acpi_ut_allocate_and_track()
109 /* Report allocation error */ in acpi_ut_allocate_and_track()
118 acpi_ut_track_allocation(allocation, size, ACPI_MEM_MALLOC, in acpi_ut_allocate_and_track()
121 acpi_os_free(allocation); in acpi_ut_allocate_and_track()
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/Linux-v6.6/tools/perf/pmu-events/arch/x86/sapphirerapids/
Duncore-cxl.json11 "BriefDescription": "Number of Allocation to Mem Rxx AGF 0",
19 "BriefDescription": "Number of Allocation to Cache Req AGF0",
27 "BriefDescription": "Number of Allocation to Cache Rsp AGF",
35 "BriefDescription": "Number of Allocation to Cache Data AGF",
43 "BriefDescription": "Number of Allocation to Cache Rsp AGF",
51 "BriefDescription": "Number of Allocation to Cache Req AGF 1",
59 "BriefDescription": "Number of Allocation to Mem Data AGF",
203 "BriefDescription": "Number of Allocation to Cache Data Packing buffer",
211 "BriefDescription": "Number of Allocation to Cache Req Packing buffer",
219 "BriefDescription": "Number of Allocation to Cache Rsp Packing buffer",
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/Linux-v6.6/tools/testing/selftests/resctrl/
Dmba_test.c3 * Memory Bandwidth Allocation (MBA) test
23 * For each allocation, run 5 times in order to get average values.
27 static int runs_per_allocation, allocation = 100; in mba_setup() local
38 if (allocation < ALLOCATION_MIN || allocation > ALLOCATION_MAX) in mba_setup()
41 sprintf(allocation_str, "%d", allocation); in mba_setup()
48 allocation -= ALLOCATION_STEP; in mba_setup()
55 int allocation, runs; in show_mba_info() local
60 for (allocation = 0; allocation < ALLOCATION_MAX / ALLOCATION_STEP; in show_mba_info()
61 allocation++) { in show_mba_info()
71 for (runs = NUM_OF_RUNS * allocation + 1; in show_mba_info()
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/Linux-v6.6/Documentation/core-api/
Dmemory-allocation.rst4 Memory Allocation Guide
7 Linux provides a variety of APIs for memory allocation. You can
14 Most of the memory allocation APIs use GFP flags to express how that
16 pages", the underlying memory allocation function.
18 Diversity of the allocation APIs combined with the numerous GFP flags
26 Of course there are cases when other allocation APIs and different GFP
45 * If the allocation is performed from an atomic context, e.g interrupt
48 ``GFP_NOWAIT`` allocation is likely to fail. Allocations which
51 will be stressed unless allocation succeeds, you may use ``GFP_ATOMIC``.
66 example may be a hardware allocation that maps data directly into
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/Linux-v6.6/fs/jfs/
Djfs_dmap.c19 * SERIALIZATION of the Block Allocation Map.
21 * the working state of the block allocation map is accessed in
24 * 1) allocation and free requests that start at the dmap
28 * 2) allocation requests that start at dmap control page
46 * the working state of the block allocation map also includes read/
48 * free block count, allocation group level free block counts).
53 * accesses to the persistent state of the block allocation map (limited
139 * FUNCTION: initializate the block allocation map.
245 * FUNCTION: terminate the block allocation map in preparation for
334 * allocation map.
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Djfs_imap.h21 #define MAXAG 128 /* maximum number of allocation groups */
23 #define AMAPSIZE 512 /* bytes in the IAG allocation maps */
39 * inode allocation map:
41 * inode allocation map consists of
43 * . inode allocation group pages (per 4096 inodes)
47 * inode allocation group page (per 4096 inodes of an AG)
51 __le32 iagnum; /* 4: inode allocation group number */
73 /* allocation bit map: 1 bit per inode (0 - free, 1 - allocated) */
74 __le32 wmap[EXTSPERIAG]; /* 512: working allocation map */
75 __le32 pmap[EXTSPERIAG]; /* 512: persistent allocation map */
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Djfs_mount.c18 * allocation map inode" (aka fileset inode):
21 * allocation map inode" (aka aggregate inode) where each inode
98 * initialize aggregate inode allocation map in jfs_mount()
106 * open aggregate block allocation map in jfs_mount()
119 * initialize aggregate block allocation map in jfs_mount()
127 * open the secondary aggregate inode allocation map in jfs_mount()
129 * This is a duplicate of the aggregate inode allocation map. in jfs_mount()
149 * initialize secondary aggregate inode allocation map in jfs_mount()
164 * open fileset inode allocation map (aka fileset inode) in jfs_mount()
169 /* open fileset secondary inode allocation map */ in jfs_mount()
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/Linux-v6.6/mm/
Dzbud.c38 * allocation function, zbud_alloc(), returns an opaque handle to the user,
41 * allocation data and unmap the handle with zbud_unmap() when operations
42 * on the allocation data are complete.
60 * NCHUNKS_ORDER determines the internal allocation granularity, effectively
63 * allocation granularity will be in chunks of size PAGE_SIZE/64. As one chunk
126 /* Converts an allocation size in bytes to size in zbud chunks */
162 * Add CHUNK_SIZE to the handle if it is the first allocation to jump in encode_handle()
197 * Return: pointer to the new zbud pool or NULL if the metadata allocation
230 * @size: size in bytes of the desired allocation
232 * @handle: handle of the new allocation
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Ddmapool.c57 unsigned int allocation; member
63 struct dma_page { /* cacheable header for 'allocation' bytes */
127 if ((dma - page->dma) < pool->allocation) in pool_find_page()
161 memset(page->vaddr, POOL_POISON_FREED, pool->allocation); in pool_init_page()
221 * Return: a dma allocation pool with the requested characteristics, or
228 size_t allocation; in dma_pool_create() local
245 allocation = max_t(size_t, size, PAGE_SIZE); in dma_pool_create()
248 boundary = allocation; in dma_pool_create()
252 boundary = min(boundary, allocation); in dma_pool_create()
266 retval->allocation = allocation; in dma_pool_create()
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/Linux-v6.6/Documentation/trace/
Devents-kmem.rst5 The kmem tracing system captures events related to object and page allocation
8 - Slab allocation of small objects of unknown type (kmalloc)
9 - Slab allocation of small objects of known type
10 - Page allocation
17 1. Slab allocation of small objects of unknown type
27 internal fragmented as a result of the allocation pattern. By correlating
29 the allocation sites were.
32 2. Slab allocation of small objects of known type
45 3. Page allocation
54 These four events deal with page allocation and freeing. mm_page_alloc is
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/Linux-v6.6/Documentation/admin-guide/mm/
Dnuma_memory_policy.rst38 use "local allocation" described below. However, during boot
82 A VMA policy will govern the allocation of pages that back
138 support allocation at fault time--a.k.a lazy allocation--so hugetlbfs
140 Although hugetlbfs segments now support lazy allocation, their support
197 closest to the node where the allocation takes place.
200 This mode specifies that the allocation should be attempted
202 allocation fails, the kernel will search other nodes, in order
209 and the policy is interpreted as local allocation. "Local"
210 allocation policy can be viewed as a Preferred policy that
211 starts at the node containing the cpu where the allocation
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/Linux-v6.6/include/linux/
Dgfp_types.h8 * typedef gfp_t - Memory allocation flags.
12 * the underlying memory allocation function. Not every GFP flag is
94 * pages being in one zone (fair zone allocation policy).
96 * %__GFP_HARDWALL enforces the cpuset memory allocation policy.
98 * %__GFP_THISNODE forces the allocation to be satisfied from the requested
101 * %__GFP_ACCOUNT causes the allocation to be accounted to kmemcg.
121 * the caller guarantees the allocation will allow more memory to be freed
159 * canonical example is THP allocation where a fallback is cheap but
194 * If the allocation does fail, and the caller is in a position to
199 * cannot handle allocation failures. The allocation could block
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Ddmapool.h4 * Allocation pools for DMAable (coherent) memory.
22 size_t size, size_t align, size_t allocation);
34 size_t size, size_t align, size_t allocation);
39 struct device *dev, size_t size, size_t align, size_t allocation) in dma_pool_create() argument
47 struct device *dev, size_t size, size_t align, size_t allocation) in dmam_pool_create() argument
/Linux-v6.6/sound/core/
Dpcm_memory.c32 MODULE_PARM_DESC(max_alloc_per_card, "Max total allocation bytes per card.");
76 /* the actual allocation size might be bigger than requested, in do_alloc_pages()
82 /* take back on allocation failure */ in do_alloc_pages()
317 * snd_pcm_lib_preallocate_pages - pre-allocation for the given DMA type
321 * @size: the requested pre-allocation size in bytes
322 * @max: the max. allowed pre-allocation size
324 * Do pre-allocation for the given DMA buffer type.
335 …* snd_pcm_lib_preallocate_pages_for_all - pre-allocation for continuous memory type (all substream…
339 * @size: the requested pre-allocation size in bytes
340 * @max: the max. allowed pre-allocation size
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/Linux-v6.6/arch/x86/include/asm/
Dhw_irq.h63 * irq_alloc_info - X86 specific interrupt allocation info
64 * @type: X86 specific allocation type
65 * @flags: Flags for allocation tweaks
68 * @mask: CPU mask for vector allocation
70 * @data: Allocation specific data
72 * @ioapic: IOAPIC specific allocation data
73 * @uv: UV specific allocation data
/Linux-v6.6/fs/ocfs2/
Dreservations.h5 * Allocation reservations function prototypes and structures.
108 * @cstart: start of proposed allocation
109 * @clen: length (in clusters) of proposed allocation
116 * On success, zero is returned and the valid allocation area is set in cstart
129 * @cstart: start of allocation in clusters
130 * @clen: end of allocation in clusters.
132 * Tell the reservation code that bits were used to fulfill allocation in
136 * reservations bitmap. If resv is passed, it's next allocation window will be
/Linux-v6.6/Documentation/mm/
Dpage_frags.rst11 simple allocation framework for page fragments. This is used by the
17 cache is needed. This provides a central point for the fragment allocation
20 which can be expensive at allocation time. However due to the nature of
23 to be disabled when executing the fragment allocation.
26 allocation. The netdev_alloc_cache is used by callers making use of the
41 avoid calling get_page per allocation.
Dnuma.rst75 selected zone/node cannot satisfy the allocation request. This situation,
87 By default, Linux will attempt to satisfy memory allocation requests from the
90 for the node where the request originates. This is called "local allocation."
95 Local allocation will tend to keep subsequent access to the allocated memory
110 allocation behavior using Linux NUMA memory policy. [see
127 Some kernel allocations do not want or cannot tolerate this allocation fallback
132 A typical model for making such an allocation is to obtain the node id of the
135 the node id returned. When such an allocation fails, the requesting subsystem
138 itself on allocation failure. The kernel profiling subsystem is an example of
/Linux-v6.6/fs/xfs/libxfs/
Dxfs_trans_resv.c81 * in the same transaction as an allocation or a free, so we compute them
139 * the allocation btrees: 2 trees * (max depth - 1) * block size
157 * the tree during individual inode allocation. Therefore the finobt
158 * reservation is unconditional for both the inode chunk allocation and
159 * individual inode allocation (modify) cases.
162 * traditional inobt: cover a full finobt shape change plus block allocation.
178 * the allocation btrees: 2 trees * (max depth - 1) * block size
182 * allocation or free and which type of create transaction is in use. An inode
184 * headers (N == 0). An inode chunk allocation requires a chunk sized
186 * reservation is required for allocation on v5 supers, which use ordered
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Dxfs_alloc.h40 xfs_agnumber_t agno; /* allocation group number */
41 xfs_agblock_t agbno; /* allocation group-relative block # */
54 char wasdel; /* set if allocation was prev delayed */
55 char wasfromfl; /* set if allocation is from freelist */
66 #define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
102 * space matching the requirements in that AG, then the allocation will fail.
108 * viable candidates in the AG, then fail the allocation.
115 * then the allocation fails.
121 * Best effort full filesystem allocation scan.
123 * Locality aware allocation will be attempted in the initial AG, but on failure
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/Linux-v6.6/include/net/page_pool/
Dtypes.h26 * Fast allocation side cache array/stack
49 * @order: 2^order pages on allocation
75 * struct page_pool_alloc_stats - allocation statistics
79 * @empty: ptr ring is empty, so a slow path allocation was forced
80 * @refill: an allocation which triggered a refill of the cache
143 * Data structure for allocation side
145 * Drivers allocation side usually already perform some kind
147 * require driver to protect allocation side.
161 * association with allocation resource.
/Linux-v6.6/Documentation/filesystems/ext4/
Dbigalloc.rst15 use clustered allocation, so that each bit in the ext4 block allocation
19 This means that each bit in the block allocation bitmap now addresses
20 256 4k blocks. This shrinks the total size of the block allocation
29 128MiB); however, the minimum allocation unit becomes a cluster, not a
/Linux-v6.6/tools/perf/pmu-events/arch/x86/broadwellx/
Dfrontend.json13 …he switch itself, for example, when Instruction Decode Queue (IDQ) pre-allocation is unavailable, …
189 …"BriefDescription": "Uops not delivered to Resource Allocation Table (RAT) per thread when backend…
192 …Allocation Table (RAT) per thread adding 4 x when Resource Allocation Table (RAT) is not stalled …
197 …: "Cycles per thread when 4 or more uops are not delivered to Resource Allocation Table (RAT) when…
201 …on the per-thread basis, cycles when no uops are delivered to Resource Allocation Table (RAT). IDQ…
206 …"BriefDescription": "Counts cycles FE delivered 4 uops or Resource Allocation Table (RAT) was stal…
215 …: "Cycles per thread when 3 or more uops are not delivered to Resource Allocation Table (RAT) when…
219 …er-thread basis, cycles when less than 1 uop is delivered to Resource Allocation Table (RAT). IDQ…
/Linux-v6.6/tools/perf/pmu-events/arch/x86/broadwellde/
Dfrontend.json13 …he switch itself, for example, when Instruction Decode Queue (IDQ) pre-allocation is unavailable, …
189 …"BriefDescription": "Uops not delivered to Resource Allocation Table (RAT) per thread when backend…
192 …Allocation Table (RAT) per thread adding 4 x when Resource Allocation Table (RAT) is not stalled …
197 …: "Cycles per thread when 4 or more uops are not delivered to Resource Allocation Table (RAT) when…
201 …on the per-thread basis, cycles when no uops are delivered to Resource Allocation Table (RAT). IDQ…
206 …"BriefDescription": "Counts cycles FE delivered 4 uops or Resource Allocation Table (RAT) was stal…
215 …: "Cycles per thread when 3 or more uops are not delivered to Resource Allocation Table (RAT) when…
219 …er-thread basis, cycles when less than 1 uop is delivered to Resource Allocation Table (RAT). IDQ…
/Linux-v6.6/tools/perf/pmu-events/arch/x86/broadwell/
Dfrontend.json13 …he switch itself, for example, when Instruction Decode Queue (IDQ) pre-allocation is unavailable, …
189 …"BriefDescription": "Uops not delivered to Resource Allocation Table (RAT) per thread when backend…
192 …Allocation Table (RAT) per thread adding 4 x when Resource Allocation Table (RAT) is not stalled …
197 …: "Cycles per thread when 4 or more uops are not delivered to Resource Allocation Table (RAT) when…
201 …on the per-thread basis, cycles when no uops are delivered to Resource Allocation Table (RAT). IDQ…
206 …"BriefDescription": "Counts cycles FE delivered 4 uops or Resource Allocation Table (RAT) was stal…
215 …: "Cycles per thread when 3 or more uops are not delivered to Resource Allocation Table (RAT) when…
219 …er-thread basis, cycles when less than 1 uop is delivered to Resource Allocation Table (RAT). IDQ…

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