diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmalloc.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 41f924a9b52e9..4d90a6ad83aa7 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -4879,10 +4879,27 @@ static void __init vmap_init_free_space(void) static void vmap_init_nodes(void) { struct vmap_node *vn; - int i, j; + int i, n; + +#if BITS_PER_LONG == 64 + /* A high threshold of max nodes is fixed and bound to 128. */ + n = clamp_t(unsigned int, num_possible_cpus(), 1, 128); + + if (n > 1) { + vn = kmalloc_array(n, sizeof(*vn), GFP_NOWAIT | __GFP_NOWARN); + if (vn) { + /* Node partition is 16 pages. */ + vmap_zone_size = (1 << 4) * PAGE_SIZE; + nr_vmap_nodes = n; + vmap_nodes = vn; + } else { + pr_err("Failed to allocate an array. Disable a node layer\n"); + } + } +#endif - for (i = 0; i < nr_vmap_nodes; i++) { - vn = &vmap_nodes[i]; + for (n = 0; n < nr_vmap_nodes; n++) { + vn = &vmap_nodes[n]; vn->busy.root = RB_ROOT; INIT_LIST_HEAD(&vn->busy.head); spin_lock_init(&vn->busy.lock); @@ -4891,9 +4908,9 @@ static void vmap_init_nodes(void) INIT_LIST_HEAD(&vn->lazy.head); spin_lock_init(&vn->lazy.lock); - for (j = 0; j < MAX_VA_SIZE_PAGES; j++) { - INIT_LIST_HEAD(&vn->pool[j].head); - WRITE_ONCE(vn->pool[j].len, 0); + for (i = 0; i < MAX_VA_SIZE_PAGES; i++) { + INIT_LIST_HEAD(&vn->pool[i].head); + WRITE_ONCE(vn->pool[i].len, 0); } spin_lock_init(&vn->pool_lock); |