diff options
Diffstat (limited to 'sys/vm/vm_phys.c')
-rw-r--r-- | sys/vm/vm_phys.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/vm/vm_phys.c b/sys/vm/vm_phys.c index c16282974a40..49cba32ca576 100644 --- a/sys/vm/vm_phys.c +++ b/sys/vm/vm_phys.c @@ -111,6 +111,24 @@ static struct vm_freelist __aligned(CACHE_LINE_SIZE) static int __read_mostly vm_nfreelists; /* + * These "avail lists" are globals used to communicate boot-time physical + * memory layout to other parts of the kernel. Each physically contiguous + * region of memory is defined by a start address at an even index and an + * end address at the following odd index. Each list is terminated by a + * pair of zero entries. + * + * dump_avail tells the dump code what regions to include in a crash dump, and + * phys_avail is all of the remaining physical memory that is available for + * the vm system. + * + * Initially dump_avail and phys_avail are identical. Boot time memory + * allocations remove extents from phys_avail that may still be included + * in dumps. + */ +vm_paddr_t phys_avail[PHYS_AVAIL_COUNT]; +vm_paddr_t dump_avail[PHYS_AVAIL_COUNT]; + +/* * Provides the mapping from VM_FREELIST_* to free list indices (flind). */ static int __read_mostly vm_freelist_to_flind[VM_NFREELIST]; |