diff options
Diffstat (limited to 'mm/percpu.c')
| -rw-r--r-- | mm/percpu.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 548624309f83..cc9c4c64606d 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -98,7 +98,7 @@ struct pcpu_chunk { int map_used; /* # of map entries used */ int map_alloc; /* # of map entries allocated */ int *map; /* allocation map */ - struct vm_struct *vm; /* mapped vmalloc region */ + struct vm_struct **vms; /* mapped vmalloc regions */ bool immutable; /* no [de]population allowed */ unsigned long populated[]; /* populated bitmap */ }; @@ -106,7 +106,7 @@ struct pcpu_chunk { static int pcpu_unit_pages __read_mostly; static int pcpu_unit_size __read_mostly; static int pcpu_nr_units __read_mostly; -static int pcpu_chunk_size __read_mostly; +static int pcpu_atom_size __read_mostly; static int pcpu_nr_slots __read_mostly; static size_t pcpu_chunk_struct_size __read_mostly; @@ -121,6 +121,11 @@ EXPORT_SYMBOL_GPL(pcpu_base_addr); static const int *pcpu_unit_map __read_mostly; /* cpu -> unit */ const unsigned long *pcpu_unit_offsets __read_mostly; /* cpu -> unit offset */ +/* group information, used for vm allocation */ +static int pcpu_nr_groups __read_mostly; +static const unsigned long *pcpu_group_offsets __read_mostly; +static const size_t *pcpu_group_sizes __read_mostly; + /* * The first chunk which always exists. Note that unlike other * chunks, this one can be allocated and mapped in several different @@ -988,8 +993,8 @@ static void free_pcpu_chunk(struct pcpu_chunk *chunk) { if (!chunk) return; - if (chunk->vm) - free_vm_area(chunk->vm); + if (chunk->vms) + pcpu_free_vm_areas(chunk->vms, pcpu_nr_groups); pcpu_mem_free(chunk->map, chunk->map_alloc * sizeof(chunk->map[0])); kfree(chunk); } @@ -1006,8 +1011,10 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void) chunk->map_alloc = PCPU_DFL_MAP_ALLOC; chunk->map[chunk->map_used++] = pcpu_unit_size; - chunk->vm = get_vm_area(pcpu_chunk_size, VM_ALLOC); - if (!chunk->vm) { + chunk->vms = pcpu_get_vm_areas(pcpu_group_offsets, pcpu_group_sizes, + pcpu_nr_groups, pcpu_atom_size, + GFP_KERNEL); + if (!chunk->vms) { free_pcpu_chunk(chunk); return NULL; } @@ -1015,7 +1022,7 @@ static struct pcpu_chunk *alloc_pcpu_chunk(void) INIT_LIST_HEAD(&chunk->list); chunk->free_size = pcpu_unit_size; chunk->contig_hint = pcpu_unit_size; - chunk->base_addr = chunk->vm->addr; + chunk->base_addr = chunk->vms[0]->addr - pcpu_group_offsets[0]; return chunk; } @@ -1571,6 +1578,8 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, size_t dyn_size = ai->dyn_size; size_t size_sum = ai->static_size + ai->reserved_size + dyn_size; struct pcpu_chunk *schunk, *dchunk = NULL; + unsigned long *group_offsets; + size_t *group_sizes; unsigned long *unit_off; unsigned int cpu; int *unit_map; @@ -1588,7 +1597,9 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, pcpu_dump_alloc_info(KERN_DEBUG, ai); - /* determine number of units and initialize unit_map and base */ + /* process group information and build config tables accordingly */ + group_offsets = alloc_bootmem(ai->nr_groups * sizeof(group_offsets[0])); + group_sizes = alloc_bootmem(ai->nr_groups * sizeof(group_sizes[0])); unit_map = alloc_bootmem(nr_cpu_ids * sizeof(unit_map[0])); unit_off = alloc_bootmem(nr_cpu_ids * sizeof(unit_off[0])); @@ -1599,6 +1610,9 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, for (group = 0, unit = 0; group < ai->nr_groups; group++, unit += i) { const struct pcpu_group_info *gi = &ai->groups[group]; + group_offsets[group] = gi->base_offset; + group_sizes[group] = gi->nr_units * ai->unit_size; + for (i = 0; i < gi->nr_units; i++) { cpu = gi->cpu_map[i]; if (cpu == NR_CPUS) @@ -1620,13 +1634,16 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, for_each_possible_cpu(cpu) BUG_ON(unit_map[cpu] == NR_CPUS); + pcpu_nr_groups = ai->nr_groups; + pcpu_group_offsets = group_offsets; + pcpu_group_sizes = group_sizes; pcpu_unit_map = unit_map; pcpu_unit_offsets = unit_off; /* determine basic parameters */ pcpu_unit_pages = ai->unit_size >> PAGE_SHIFT; pcpu_unit_size = pcpu_unit_pages << PAGE_SHIFT; - pcpu_chunk_size = pcpu_nr_units * pcpu_unit_size; + pcpu_atom_size = ai->atom_size; pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) + BITS_TO_LONGS(pcpu_unit_pages) * sizeof(unsigned long); |