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
46 in a system, one bit position per node number. Used to keep track of
52 The global page directory pointer of the kernel. Used to translate
59 the kernel start address. Used to convert a virtual address from the
76 Used to map an address to the corresponding struct page.
82 used to describe the memory layout.
93 similar to the mem_map variable, both of them are used to translate an
105 and it is widely used to compute contiguous memory.
110 The size of a pglist_data structure. This value is used to check if the
111 pglist_data structure is valid. It is also used for checking the memory
117 The size of a zone structure. This value is used to check if the zone
118 structure has been found. It is also used for excluding free pages.
129 The size of a list_head structure. Used when iterating lists in a
135 The size of a nodemask_t type. Used to compute the number of online
142 variables. The variables are used when excluding unnecessary pages.
151 These values are used to check the memory type and to compute the
166 Offset of the free_list's member. This value is used to compute the number
175 Offsets of the list_head's members. list_head is used to define a
190 free_area ranges. MAX_ORDER is used by the zone buddy allocator.
198 Used by user-space tools to read the active kernel log buffer.
213 SYSLOG_ACTION_CLEAR, like issued by 'dmesg -c'. Used by user-space
226 Offsets for the various components of the printk ringbuffer. Used by
239 Offsets for the fields describing the set of record descriptors. Used
252 Offsets for the fields describing a record descriptors. Used by
266 Offsets for the fields describing the location of a data block. Used
279 Offsets for the fields providing the meta-data for a record. Used by
292 Offsets for the fields describing a set of data blocks. Used by
299 The size of the atomic_long_t structure. Used by user-space tools to
306 Offset for the long value of an atomic_long_t variable. Used by
314 array. Used by tools to compute the number of free pages.
320 vm_stat[NR_FREE_PAGES]. Used to get the number of free pages.
325 Page attributes. These flags are used to filter various unnecessary for
331 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
432 These values are used to compute the number of nodes the crashed kernel used.
438 node_memblk_s's members. Used to compute the number of nodes.
444 4-level paging mode. Used to distinguish the page table.
452 The maximum number of bits for virtual addresses. Used to compute the
458 The offset between the kernel virtual and physical mappings. Used to
465 kimage_voffset, which is used to translate virtual to physical
471 The kernel randomization offset. Used to compute the page offset. If
487 architecture which is used to lookup the page-tables for the Virtual
498 extensions. Used to translate virtual to physical addresses.
506 An array with a pointer to the lowcore of every CPU. Used to print the
512 Used to get the vmalloc_start address from the high_memory symbol.
536 The vmemmap_list maintains the entire vmemmap physical mapping. Used
539 it is used to translate vmemmap kernel virtual addresses.
544 The size of a page. Used to translate virtual to physical addresses.
551 Used to make vtop translations.
570 Used in vtop translations.