diff options
| -rw-r--r-- | arch/x86/mm/numa_64.c | 75 |
1 files changed, 40 insertions, 35 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 848381b..cccc01d 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -401,6 +401,44 @@ void __init numa_reset_distance(void) numa_distance = NULL; } +static int __init numa_alloc_distance(void) +{ + nodemask_t nodes_parsed; + size_t size; + int i, j, cnt = 0; + u64 phys; + + /* size the new table and allocate it */ + nodes_parsed = numa_nodes_parsed; + numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); + + for_each_node_mask(i, nodes_parsed) + cnt = i; + size = ++cnt * sizeof(numa_distance[0]); + + phys = memblock_find_in_range(0, (u64)max_pfn_mapped << PAGE_SHIFT, + size, PAGE_SIZE); + if (phys == MEMBLOCK_ERROR) { + pr_warning("NUMA: Warning: can't allocate distance table!\n"); + /* don't retry until explicitly reset */ + numa_distance = (void *)1LU; + return -ENOMEM; + } + memblock_x86_reserve_range(phys, phys + size, "NUMA DIST"); + + numa_distance = __va(phys); + numa_distance_cnt = cnt; + + /* fill with the default distances */ + for (i = 0; i < cnt; i++) + for (j = 0; j < cnt; j++) + numa_distance[i * cnt + j] = i == j ? + LOCAL_DISTANCE : REMOTE_DISTANCE; + printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt); + + return 0; +} + /** * numa_set_distance - Set NUMA distance from one NUMA to another * @from: the 'from' node to set distance @@ -413,41 +451,8 @@ void __init numa_reset_distance(void) */ void __init numa_set_distance(int from, int to, int distance) { - if (!numa_distance) { - nodemask_t nodes_parsed; - size_t size; - int i, j, cnt = 0; - u64 phys; - - /* size the new table and allocate it */ - nodes_parsed = numa_nodes_parsed; - numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); - - for_each_node_mask(i, nodes_parsed) - cnt = i; - size = ++cnt * sizeof(numa_distance[0]); - - phys = memblock_find_in_range(0, - (u64)max_pfn_mapped << PAGE_SHIFT, - size, PAGE_SIZE); - if (phys == MEMBLOCK_ERROR) { - pr_warning("NUMA: Warning: can't allocate distance table!\n"); - /* don't retry until explicitly reset */ - numa_distance = (void *)1LU; - return; - } - memblock_x86_reserve_range(phys, phys + size, "NUMA DIST"); - - numa_distance = __va(phys); - numa_distance_cnt = cnt; - - /* fill with the default distances */ - for (i = 0; i < cnt; i++) - for (j = 0; j < cnt; j++) - numa_distance[i * cnt + j] = i == j ? - LOCAL_DISTANCE : REMOTE_DISTANCE; - printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt); - } + if (!numa_distance && numa_alloc_distance() < 0) + return; if (from >= numa_distance_cnt || to >= numa_distance_cnt) { printk_once(KERN_DEBUG "NUMA: Debug: distance out of bound, from=%d to=%d distance=%d\n", |
