admin-guide/kdump/vmcoreinfo.rst

11 section and used by user-space tools like crash and makedumpfile to
20 The version of the Linux kernel. Used to find the corresponding source
27 The size of a page. It is the smallest unit of data used by the memory
29 aligned on 4096 bytes. Used for computing page addresses.
34 The UTS namespace which is used to isolate two specific elements of the
36 data structure used to store information returned by the uname(2) system
52 in a system, one bit position per node number. Used to keep track of
58 The global page directory pointer of the kernel. Used to translate
65 the kernel start address. Used to convert a virtual address from the
82 Used to map an address to the corresponding struct page.
88 used to describe the memory layout.
99 similar to the mem_map variable, both of them are used to translate an
111 and it is widely used to compute contiguous memory.
116 The size of a pglist_data structure. This value is used to check if the
117 pglist_data structure is valid. It is also used for checking the memory
123 The size of a zone structure. This value is used to check if the zone
124 structure has been found. It is also used for excluding free pages.
135 The size of a list_head structure. Used when iterating lists in a
141 The size of a nodemask_t type. Used to compute the number of online
148 variables. The variables are used when excluding unnecessary pages.
157 These values are used to check the memory type and to compute the
172 Offset of the free_list's member. This value is used to compute the number
181 Offsets of the list_head's members. list_head is used to define a
196 free_area ranges. NR_PAGE_ORDERS is used by the zone buddy allocator.
204 Used by user-space tools to read the active kernel log buffer.
219 SYSLOG_ACTION_CLEAR, like issued by 'dmesg -c'. Used by user-space
232 Offsets for the various components of the printk ringbuffer. Used by
245 Offsets for the fields describing the set of record descriptors. Used
258 Offsets for the fields describing a record descriptors. Used by
272 Offsets for the fields describing the location of a data block. Used
285 Offsets for the fields providing the meta-data for a record. Used by
298 Offsets for the fields describing a set of data blocks. Used by
305 The size of the atomic_long_t structure. Used by user-space tools to
312 Offset for the long value of an atomic_long_t variable. Used by
320 array. Used by tools to compute the number of free pages.
326 vm_stat[NR_FREE_PAGES]. Used to get the number of free pages.
331 Page attributes. These flags are used to filter various unnecessary for
337 More page attributes. These flags are used to filter various unnecessary for
347 Used to convert the virtual address of an exported kernel symbol to its
353 Used to walk through the whole page table and convert virtual addresses
355 swapper_pg_dir, but it is only used in x86_64.
377 The kernel randomization offset. Used to compute the page offset. If
383 Currently unused by Makedumpfile. Used to compute the module virtual
393 mask. This is used to remove the SME mask and obtain the true physical
413 table space per process. Used to check whether PAE was enabled in the
422 The maximum number of bits for virtual addresses. Used to compute the
428 The offset between the kernel virtual and physical mappings. Used to
435 kimage_voffset, which is used to translate virtual to physical
441 The kernel randomization offset. Used to compute the page offset. If
457 architecture which is used to lookup the page-tables for the Virtual
464 Used to get the correct ranges:
467 	VMEMMAP_START ~ VMEMMAP_END-1 : vmemmap region, used for struct page array.
476 extensions. Used to translate virtual to physical addresses.
484 An array with a pointer to the lowcore of every CPU. Used to print the
490 Used to get the vmalloc_start address from the high_memory symbol.
514 The vmemmap_list maintains the entire vmemmap physical mapping. Used
517 it is used to translate vmemmap kernel virtual addresses.
522 The size of a page. Used to translate virtual to physical addresses.
529 Used to make vtop translations.
548 Used in vtop translations.
569 The maximum number of bits for virtual addresses. Used to compute the
585 Used to get the correct ranges:
589   * VMEMMAP_START ~ VMEMMAP_END : vmemmap space, used for struct page array.
596 Used to translate virtual to physical addresses.