| /linux/mm/ |
| H A D | percpu-vm.c | 23 * pcpu_get_pages - get temp pages array
30 * Pointer to temp pages array on success.
34 static struct page **pages; in pcpu_get_pages() local
35 size_t pages_size = pcpu_nr_units * pcpu_unit_pages * sizeof(pages[0]); in pcpu_get_pages()
39 if (!pages) in pcpu_get_pages()
40 pages = pcpu_mem_zalloc(pages_size, GFP_KERNEL); in pcpu_get_pages()
41 return pages; in pcpu_get_pages()
45 * pcpu_free_pages - free pages which were allocated for @chunk
46 * @chunk: chunk pages were allocated for
47 * @pages: array of pages to be freed, indexed by pcpu_page_idx()
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| /linux/net/ceph/ |
| H A D | pagevec.c | 13 void ceph_put_page_vector(struct page **pages, int num_pages, bool dirty) in ceph_put_page_vector() argument
19 set_page_dirty_lock(pages[i]); in ceph_put_page_vector()
20 put_page(pages[i]); in ceph_put_page_vector()
22 kvfree(pages); in ceph_put_page_vector()
26 void ceph_release_page_vector(struct page **pages, int num_pages) in ceph_release_page_vector() argument
31 __free_pages(pages[i], 0); in ceph_release_page_vector()
32 kfree(pages); in ceph_release_page_vector()
37 * allocate a vector new pages
41 struct page **pages; in ceph_alloc_page_vector() local
44 pages = kmalloc_objs(*pages, num_pages, flags); in ceph_alloc_page_vector()
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| /linux/drivers/gpu/drm/i915/gem/selftests/ |
| H A D | huge_gem_object.c | 12 struct sg_table *pages) in huge_free_pages() argument
18 for_each_sgt_page(page, sgt_iter, pages) { in huge_free_pages()
24 sg_free_table(pages); in huge_free_pages()
25 kfree(pages); in huge_free_pages()
34 struct sg_table *pages; in huge_get_pages() local
41 pages = kmalloc_obj(*pages, GFP); in huge_get_pages()
42 if (!pages) in huge_get_pages()
45 if (sg_alloc_table(pages, npages, GFP)) { in huge_get_pages()
46 kfree(pages); in huge_get_pages()
50 sg = pages->sgl; in huge_get_pages()
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| /linux/Documentation/admin-guide/mm/ |
| H A D | zswap.rst | 8 Zswap is a lightweight compressed cache for swap pages. It takes pages that are
26 Zswap evicts pages from compressed cache on an LRU basis to the backing swap
40 When zswap is disabled at runtime it will stop storing pages that are
42 back into memory all of the pages stored in the compressed pool. The
43 pages stored in zswap will remain in the compressed pool until they are
45 pages out of the compressed pool, a swapoff on the swap device(s) will
46 fault back into memory all swapped out pages, including those in the
52 Zswap receives pages for compression from the swap subsystem and is able to
53 evict pages from its own compressed pool on an LRU basis and write them back to
60 pages are freed. The pool is not preallocated.
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| H A D | ksm.rst | 18 which have been registered with it, looking for pages of identical
21 content). The amount of pages that KSM daemon scans in a single pass
25 KSM only merges anonymous (private) pages, never pagecache (file) pages.
26 KSM's merged pages were originally locked into kernel memory, but can now
27 be swapped out just like other user pages (but sharing is broken when they
45 to cancel that advice and restore unshared pages: whereupon KSM
55 cannot contain any pages which KSM could actually merge; even if
80 how many pages to scan before ksmd goes to sleep
95 specifies if pages from different NUMA nodes can be merged.
96 When set to 0, ksm merges only pages which physically reside
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| H A D | concepts.rst | 41 The physical system memory is divided into page frames, or pages. The
48 pages. These mappings are described by page tables that allow
53 addresses of actual pages used by the software. The tables at higher
54 levels contain physical addresses of the pages belonging to the lower
64 Huge Pages
75 Many modern CPU architectures allow mapping of the memory pages
77 it is possible to map 2M and even 1G pages using entries in the second
78 and the third level page tables. In Linux such pages are called
79 `huge`. Usage of huge pages significantly reduces pressure on TLB,
83 memory with the huge pages. The first one is `HugeTLB filesystem`, or
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| H A D | idle_page_tracking.rst | 8 The idle page tracking feature allows to track which memory pages are being
37 Only accesses to user memory pages are tracked. These are pages mapped to a
38 process address space, page cache and buffer pages, swap cache pages. For other
39 page types (e.g. SLAB pages) an attempt to mark a page idle is silently ignored,
40 and hence such pages are never reported idle.
42 For huge pages the idle flag is set only on the head page, so one has to read
43 ``/proc/kpageflags`` in order to correctly count idle huge pages.
50 That said, in order to estimate the amount of pages that are not used by a
53 1. Mark all the workload's pages as idle by setting corresponding bits in
54 ``/sys/kernel/mm/page_idle/bitmap``. The pages can be found by reading
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| H A D | pagemap.rst | 37 swap. Unmapped pages return a null PFN. This allows determining
38 precisely which pages are mapped (or in swap) and comparing mapped
39 pages between processes.
44 for pages part of a larger allocation (e.g., THP) can differ: bit 56 is set
45 if all pages part of the corresponding large allocation are *certainly*
117 An order N block has 2^N physically contiguous pages, with the BUDDY flag
118 set for all pages.
121 A compound page with order N consists of 2^N physically contiguous pages.
124 pages are hugeTLB pages (Documentation/admin-guide/mm/hugetlbpage.rst),
126 However in this interface, only huge/giga pages are made visible
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| /linux/Documentation/mm/ |
| H A D | unevictable-lru.rst | 34 main memory will have over 32 million 4k pages in a single node. When a large
35 fraction of these pages are not evictable for any reason [see below], vmscan
37 of pages that are evictable. This can result in a situation where all CPUs are
41 The unevictable list addresses the following classes of unevictable pages:
51 The infrastructure may also be able to handle other conditions that make pages
104 lru_list enum element). The memory controller tracks the movement of pages to
108 not attempt to reclaim pages on the unevictable list. This has a couple of
111 (1) Because the pages are "hidden" from reclaim on the unevictable list, the
112 reclaim process can be more efficient, dealing only with pages that have a
115 (2) On the other hand, if too many of the pages charged to the control group
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| /linux/drivers/gpu/drm/xen/ |
| H A D | xen_drm_front_gem.c | 31 struct page **pages; member
50 xen_obj->pages = kvmalloc_objs(struct page *, xen_obj->num_pages); in gem_alloc_pages_array()
51 return !xen_obj->pages ? -ENOMEM : 0; in gem_alloc_pages_array()
56 kvfree(xen_obj->pages); in gem_free_pages_array()
57 xen_obj->pages = NULL; in gem_free_pages_array()
88 * touch the memory. Insert pages now, so both CPU and GPU are happy. in xen_drm_front_gem_object_mmap()
90 * FIXME: as we insert all the pages now then no .fault handler must in xen_drm_front_gem_object_mmap()
93 ret = vm_map_pages(vma, xen_obj->pages, xen_obj->num_pages); in xen_drm_front_gem_object_mmap()
95 DRM_ERROR("Failed to map pages into vma: %d\n", ret); in xen_drm_front_gem_object_mmap()
149 * only allocate array of pointers to pages in gem_create()
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| /linux/drivers/media/pci/intel/ipu6/ |
| H A D | ipu6-dma.c | 23 struct page **pages; member
49 * Ensure that the allocated pages are zeroed, and that any data in __clear_buffer()
62 struct page **pages; in __alloc_buffer() local
65 pages = kvzalloc(array_size, GFP_KERNEL); in __alloc_buffer()
66 if (!pages) in __alloc_buffer()
74 pages[i] = alloc_pages(gfp, order); in __alloc_buffer()
75 while (!pages[i] && order) in __alloc_buffer()
76 pages[i] = alloc_pages(gfp, --order); in __alloc_buffer()
77 if (!pages[i]) in __alloc_buffer()
81 split_page(pages[i], order); in __alloc_buffer()
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| /linux/drivers/xen/ |
| H A D | xlate_mmu.c | 47 /* Break down the pages in 4KB chunk and call fn for each gfn */
48 static void xen_for_each_gfn(struct page **pages, unsigned nr_gfn, in xen_for_each_gfn() argument
57 page = pages[i / XEN_PFN_PER_PAGE]; in xen_for_each_gfn()
71 struct page **pages; member
99 struct page *page = info->pages[info->index++]; in remap_pte_fn()
148 struct page **pages) in xen_xlate_remap_gfn_array() argument
163 data.pages = pages; in xen_xlate_remap_gfn_array()
184 int nr, struct page **pages) in xen_xlate_unmap_gfn_range() argument
186 xen_for_each_gfn(pages, nr, unmap_gfn, NULL); in xen_xlate_unmap_gfn_range()
205 * xen_xlate_map_ballooned_pages - map a new set of ballooned pages
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| H A D | unpopulated-alloc.c | 21 /* Pages to subtract from the memory count when setting balloon target. */
156 * xen_alloc_unpopulated_pages - alloc unpopulated pages
157 * @nr_pages: Number of pages
158 * @pages: pages returned
161 int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages) in xen_alloc_unpopulated_pages() argument
169 * construct pages. in xen_alloc_unpopulated_pages()
172 return xen_alloc_ballooned_pages(nr_pages, pages); in xen_alloc_unpopulated_pages()
187 pages[i] = pg; in xen_alloc_unpopulated_pages()
196 pages[j]->zone_device_data = page_list; in xen_alloc_unpopulated_pages()
197 page_list = pages[j]; in xen_alloc_unpopulated_pages()
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| /linux/include/drm/ttm/ |
| H A D | ttm_tt.h | 44 * struct ttm_tt - This is a structure holding the pages, caching- and aperture
49 /** @pages: Array of pages backing the data. */
50 struct page **pages; member
56 * TTM_TT_FLAG_SWAPPED: Set by TTM when the pages have been unpopulated
58 * pages back in, and unset the flag. Drivers should in general never
61 * TTM_TT_FLAG_ZERO_ALLOC: Set if the pages will be zeroed on
64 * TTM_TT_FLAG_EXTERNAL: Set if the underlying pages were allocated
66 * TTM swapping out such pages. Also important is to prevent TTM from
67 * ever directly mapping these pages.
74 * still valid to use TTM to map the pages directly. This is useful when
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| /linux/drivers/staging/media/ipu7/ |
| H A D | ipu7-dma.c | 23 struct page **pages; member
49 * Ensure that the allocated pages are zeroed, and that any data in __clear_buffer()
62 struct page **pages; in __alloc_buffer() local
65 pages = kvzalloc(array_size, GFP_KERNEL); in __alloc_buffer()
66 if (!pages) in __alloc_buffer()
74 pages[i] = alloc_pages(gfp, order); in __alloc_buffer()
75 while (!pages[i] && order) in __alloc_buffer()
76 pages[i] = alloc_pages(gfp, --order); in __alloc_buffer()
77 if (!pages[i]) in __alloc_buffer()
81 split_page(pages[i], order); in __alloc_buffer()
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| /linux/tools/perf/pmu-events/arch/x86/amdzen4/ |
| H A D | memory.json | 40 "BriefDescription": "L1 DTLB misses with L2 DTLB hits for 4k pages.",
46 … misses with L2 DTLB hits for coalesced pages. A coalesced page is a 16k page created from four ad…
52 "BriefDescription": "L1 DTLB misses with L2 DTLB hits for 2M pages.",
58 "BriefDescription": "L1 DTLB misses with L2 DTLB hits for 1G pages.",
64 …fDescription": "L1 DTLB misses with L2 DTLB misses (page-table walks are requested) for 4k pages.",
70 …able walks are requested) for coalesced pages. A coalesced page is a 16k page created from four ad…
76 …fDescription": "L1 DTLB misses with L2 DTLB misses (page-table walks are requested) for 2M pages.",
82 …fDescription": "L1 DTLB misses with L2 DTLB misses (page-table walks are requested) for 1G pages.",
123 …tion fetches that miss in both the L1 and L2 ITLBs (page-table walks are requested) for 4k pages.",
129 …tion fetches that miss in both the L1 and L2 ITLBs (page-table walks are requested) for 2M pages.",
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| /linux/kernel/dma/ |
| H A D | remap.c | 17 return area->pages; in dma_common_find_pages()
21 * Remaps an array of PAGE_SIZE pages into another vm_area.
24 void *dma_common_pages_remap(struct page **pages, size_t size, in dma_common_pages_remap() argument
29 vaddr = vmap(pages, PAGE_ALIGN(size) >> PAGE_SHIFT, in dma_common_pages_remap()
32 find_vm_area(vaddr)->pages = pages; in dma_common_pages_remap()
44 struct page **pages; in dma_common_contiguous_remap() local
48 pages = kvmalloc_objs(struct page *, count); in dma_common_contiguous_remap()
49 if (!pages) in dma_common_contiguous_remap()
52 pages[i] = page++; in dma_common_contiguous_remap()
53 vaddr = vmap(pages, count, VM_DMA_COHERENT, prot); in dma_common_contiguous_remap()
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| /linux/drivers/gpu/drm/i915/gem/ |
| H A D | i915_gem_pages.c | 24 struct sg_table *pages) in __i915_gem_object_set_pages() argument
36 /* Make the pages coherent with the GPU (flushing any swapin). */ in __i915_gem_object_set_pages()
41 drm_clflush_sg(pages); in __i915_gem_object_set_pages()
45 obj->mm.get_page.sg_pos = pages->sgl; in __i915_gem_object_set_pages()
47 obj->mm.get_dma_page.sg_pos = pages->sgl; in __i915_gem_object_set_pages()
50 obj->mm.pages = pages; in __i915_gem_object_set_pages()
52 obj->mm.page_sizes.phys = i915_sg_dma_sizes(pages->sgl); in __i915_gem_object_set_pages()
60 * 64K or 4K pages, although in practice this will depend on a number of in __i915_gem_object_set_pages()
121 /* Ensure that the associated pages are gathered from the backing storage
124 * i915_gem_object_unpin_pages() - once the pages are no longer referenced
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| /linux/include/xen/ |
| H A D | xen-ops.h | 68 struct page **pages);
70 int nr, struct page **pages);
81 struct page **pages) in xen_xlate_remap_gfn_array() argument
87 int nr, struct page **pages) in xen_xlate_unmap_gfn_range() argument
98 * @vma: VMA to map the pages into
99 * @addr: Address at which to map the pages
104 * @domid: Domain owning the pages
105 * @pages: Array of pages if this domain has an auto-translated physmap
118 struct page **pages) in xen_remap_domain_gfn_array() argument
122 prot, domid, pages); in xen_remap_domain_gfn_array()
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| /linux/drivers/misc/ |
| H A D | vmw_balloon.c | 8 * acts like a "balloon" that can be inflated to reclaim physical pages by
10 * freeing up the underlying machine pages so they can be allocated to
51 /* Maximum number of refused pages we accumulate during inflation cycle */
147 * ballooned pages (up to 512).
149 * pages that are about to be deflated from the
152 * for 2MB pages.
155 * pages.
240 struct list_head pages; member
315 * @batch_max_pages: maximum pages that can be locked/unlocked.
317 * Indicates the number of pages that the hypervisor can lock or unlock
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| /linux/lib/vdso/ |
| H A D | datastore.c | 35 struct page *pages; in vdso_setup_data_pages() local
38 * Allocate the data pages dynamically. SPARC does not support mapping in vdso_setup_data_pages()
39 * static pages to be mapped into userspace. in vdso_setup_data_pages()
42 * Do not use folios. In time namespaces the pages are mapped in a different order in vdso_setup_data_pages()
45 pages = alloc_pages(GFP_KERNEL, order); in vdso_setup_data_pages()
46 if (!pages) in vdso_setup_data_pages()
47 panic("Unable to allocate VDSO storage pages"); in vdso_setup_data_pages()
49 /* The pages are mapped one-by-one into userspace and each one needs to be refcounted. */ in vdso_setup_data_pages()
50 split_page(pages, order); in vdso_setup_data_pages()
52 /* Move the data already written by other subsystems to the new pages */ in vdso_setup_data_pages()
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| /linux/drivers/media/common/videobuf2/ |
| H A D | frame_vector.c | 16 * @nr_frames: number of pages / pfns from start to map
18 * @vec: structure which receives pages / pfns of the addresses mapped.
22 * with page frame numbers or page pointers to corresponding pages (choice
24 * belongs to a normal vma, the function grabs reference to each of the pages
29 * The function returns number of pages mapped which may be less than
72 * put_vaddr_frames() - drop references to pages if get_vaddr_frames() acquired
76 * Drop references to pages if get_vaddr_frames() acquired them. We also
82 struct page **pages; in put_vaddr_frames() local
86 pages = frame_vector_pages(vec); in put_vaddr_frames()
89 * get_vaddr_frames() got pages but vec was later converted to pfns. in put_vaddr_frames()
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| /linux/drivers/staging/media/ipu3/ |
| H A D | ipu3-dmamap.c | 20 static void imgu_dmamap_free_buffer(struct page **pages, in imgu_dmamap_free_buffer() argument
26 __free_page(pages[count]); in imgu_dmamap_free_buffer()
27 kvfree(pages); in imgu_dmamap_free_buffer()
36 struct page **pages; in imgu_dmamap_alloc_buffer() local
42 pages = kvmalloc_objs(*pages, count); in imgu_dmamap_alloc_buffer()
44 if (!pages) in imgu_dmamap_alloc_buffer()
72 imgu_dmamap_free_buffer(pages, i << PAGE_SHIFT); in imgu_dmamap_alloc_buffer()
77 pages[i++] = page++; in imgu_dmamap_alloc_buffer()
80 return pages; in imgu_dmamap_alloc_buffer()
100 struct page **pages; in imgu_dmamap_alloc() local
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| /linux/drivers/misc/bcm-vk/ |
| H A D | bcm_vk_sg.c | 57 /* Calculate number of pages */ in bcm_vk_dma_alloc()
62 /* Allocate DMA pages */ in bcm_vk_dma_alloc()
63 dma->pages = kmalloc_objs(struct page *, dma->nr_pages); in bcm_vk_dma_alloc()
64 if (!dma->pages) in bcm_vk_dma_alloc()
67 dev_dbg(dev, "Alloc DMA Pages [0x%llx+0x%x => %d pages]\n", in bcm_vk_dma_alloc()
72 /* Get user pages into memory */ in bcm_vk_dma_alloc()
76 dma->pages); in bcm_vk_dma_alloc()
101 /* Map all pages into DMA */ in bcm_vk_dma_alloc()
105 dma->pages[0], in bcm_vk_dma_alloc()
111 __free_page(dma->pages[0]); in bcm_vk_dma_alloc()
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| /linux/Documentation/arch/x86/ |
| H A D | sgx.rst | 37 SGX utilizes an *Enclave Page Cache (EPC)* to store pages that are associated
39 Unlike pages used for regular memory, pages can only be accessed from outside of
56 Regular EPC pages contain the code and data of an enclave.
59 Thread Control Structure pages define the entry points to an enclave and
63 Version Array pages contain 512 slots, each of which can contain a version
69 The processor tracks EPC pages in a hardware metadata structure called the
95 pages and establish enclave page permissions.
108 adding and removing of enclave pages. When an enclave accesses an address
151 use since the reset, enclave pages may be in an inconsistent state. This might
153 reinitializes all enclave pages so that they can be allocated and re-used.
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