| 1 | /* |
| 2 | * ltt/probes/mm-trace.c |
| 3 | * |
| 4 | * MM tracepoint probes. |
| 5 | * |
| 6 | * (C) Copyright 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> |
| 7 | * Dual LGPL v2.1/GPL v2 license. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/mm.h> |
| 12 | #include <linux/swap.h> |
| 13 | |
| 14 | #include <asm/pgtable.h> |
| 15 | #include <asm/tlbflush.h> |
| 16 | #include <linux/swapops.h> |
| 17 | #include <trace/page_alloc.h> |
| 18 | #include <trace/filemap.h> |
| 19 | #include <trace/swap.h> |
| 20 | #include <trace/hugetlb.h> |
| 21 | |
| 22 | #include "../ltt-type-serializer.h" |
| 23 | |
| 24 | void probe_wait_on_page_start(void *_data, struct page *page, int bit_nr) |
| 25 | { |
| 26 | trace_mark_tp(mm, wait_on_page_start, wait_on_page_start, |
| 27 | probe_wait_on_page_start, "pfn %lu bit_nr %d", |
| 28 | page_to_pfn(page), bit_nr); |
| 29 | } |
| 30 | |
| 31 | void probe_wait_on_page_end(void *_data, struct page *page, int bit_nr) |
| 32 | { |
| 33 | trace_mark_tp(mm, wait_on_page_end, wait_on_page_end, |
| 34 | probe_wait_on_page_end, "pfn %lu bit_nr %d", |
| 35 | page_to_pfn(page), bit_nr); |
| 36 | } |
| 37 | |
| 38 | void probe_hugetlb_page_free(void *_data, struct page *page) |
| 39 | { |
| 40 | trace_mark_tp(mm, huge_page_free, hugetlb_page_free, |
| 41 | probe_hugetlb_page_free, "pfn %lu", page_to_pfn(page)); |
| 42 | } |
| 43 | |
| 44 | void probe_hugetlb_page_alloc(void *_data, struct page *page) |
| 45 | { |
| 46 | if (page) |
| 47 | trace_mark_tp(mm, huge_page_alloc, hugetlb_page_alloc, |
| 48 | probe_hugetlb_page_alloc, "pfn %lu", page_to_pfn(page)); |
| 49 | } |
| 50 | |
| 51 | /* mm_page_free specialized tracepoint probe */ |
| 52 | |
| 53 | void probe_page_free(void *_data, struct page *page, unsigned int order); |
| 54 | |
| 55 | DEFINE_MARKER_TP(mm, page_free, page_free, probe_page_free, |
| 56 | "pfn %lu order %u"); |
| 57 | |
| 58 | notrace void probe_page_free(void *_data, struct page *page, unsigned int order) |
| 59 | { |
| 60 | struct marker *marker; |
| 61 | struct serialize_long_int data; |
| 62 | |
| 63 | data.f1 = page_to_pfn(page); |
| 64 | data.f2 = order; |
| 65 | |
| 66 | marker = &GET_MARKER(mm, page_free); |
| 67 | ltt_specialized_trace(marker, marker->single.probe_private, |
| 68 | &data, serialize_sizeof(data), sizeof(long)); |
| 69 | } |
| 70 | |
| 71 | /* mm_page_alloc specialized tracepoint probe */ |
| 72 | |
| 73 | void probe_page_alloc(void *_data, struct page *page, unsigned int order); |
| 74 | |
| 75 | DEFINE_MARKER_TP(mm, page_alloc, page_alloc, probe_page_alloc, |
| 76 | "pfn %lu order %u"); |
| 77 | |
| 78 | notrace void probe_page_alloc(void *_data, struct page *page, unsigned int order) |
| 79 | { |
| 80 | struct marker *marker; |
| 81 | struct serialize_long_int data; |
| 82 | |
| 83 | if (unlikely(!page)) |
| 84 | return; |
| 85 | |
| 86 | data.f1 = page_to_pfn(page); |
| 87 | data.f2 = order; |
| 88 | |
| 89 | marker = &GET_MARKER(mm, page_alloc); |
| 90 | ltt_specialized_trace(marker, marker->single.probe_private, |
| 91 | &data, serialize_sizeof(data), sizeof(long)); |
| 92 | } |
| 93 | |
| 94 | #ifdef CONFIG_SWAP |
| 95 | void probe_swap_in(void *_data, struct page *page, swp_entry_t entry) |
| 96 | { |
| 97 | trace_mark_tp(mm, swap_in, swap_in, probe_swap_in, |
| 98 | "pfn %lu filp %p offset %lu", |
| 99 | page_to_pfn(page), |
| 100 | get_swap_info_struct(swp_type(entry))->swap_file, |
| 101 | swp_offset(entry)); |
| 102 | } |
| 103 | |
| 104 | void probe_swap_out(void *_data, struct page *page) |
| 105 | { |
| 106 | trace_mark_tp(mm, swap_out, swap_out, probe_swap_out, |
| 107 | "pfn %lu filp %p offset %lu", |
| 108 | page_to_pfn(page), |
| 109 | get_swap_info_struct(swp_type( |
| 110 | page_swp_entry(page)))->swap_file, |
| 111 | swp_offset(page_swp_entry(page))); |
| 112 | } |
| 113 | |
| 114 | void probe_swap_file_close(void *_data, struct file *file) |
| 115 | { |
| 116 | trace_mark_tp(mm, swap_file_close, swap_file_close, |
| 117 | probe_swap_file_close, "filp %p", file); |
| 118 | } |
| 119 | |
| 120 | void probe_swap_file_open(void *_data, struct file *file, char *filename) |
| 121 | { |
| 122 | trace_mark_tp(mm, swap_file_open, swap_file_open, |
| 123 | probe_swap_file_open, "filp %p filename %s", |
| 124 | file, filename); |
| 125 | } |
| 126 | #endif |
| 127 | |
| 128 | void probe_add_to_page_cache(void *_data, struct address_space *mapping, pgoff_t offset) |
| 129 | { |
| 130 | trace_mark_tp(mm, add_to_page_cache, add_to_page_cache, |
| 131 | probe_add_to_page_cache, |
| 132 | "inode %lu sdev %u", |
| 133 | mapping->host->i_ino, mapping->host->i_sb->s_dev); |
| 134 | } |
| 135 | |
| 136 | void probe_remove_from_page_cache(void *_data, struct address_space *mapping) |
| 137 | { |
| 138 | trace_mark_tp(mm, remove_from_page_cache, remove_from_page_cache, |
| 139 | probe_remove_from_page_cache, |
| 140 | "inode %lu sdev %u", |
| 141 | mapping->host->i_ino, mapping->host->i_sb->s_dev); |
| 142 | } |
| 143 | |
| 144 | MODULE_LICENSE("GPL and additional rights"); |
| 145 | MODULE_AUTHOR("Mathieu Desnoyers"); |
| 146 | MODULE_DESCRIPTION("MM Tracepoint Probes"); |