diff options
| -rw-r--r-- | arch/x86/mm/numa_64.c | 99 |
1 files changed, 49 insertions, 50 deletions
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c index 4fd3368adc8f..20aa1d31e165 100644 --- a/arch/x86/mm/numa_64.c +++ b/arch/x86/mm/numa_64.c @@ -189,37 +189,23 @@ static void * __init early_node_mem(int nodeid, unsigned long start, return NULL; } -static __init int conflicting_memblks(unsigned long start, unsigned long end) +int __init numa_add_memblk(int nid, u64 start, u64 end) { struct numa_meminfo *mi = &numa_meminfo; - int i; - for (i = 0; i < mi->nr_blks; i++) { - struct numa_memblk *blk = &mi->blk[i]; + /* ignore zero length blks */ + if (start == end) + return 0; - if (blk->start == blk->end) - continue; - if (blk->end > start && blk->start < end) - return blk->nid; - if (blk->end == end && blk->start == start) - return blk->nid; + /* whine about and ignore invalid blks */ + if (start > end || nid < 0 || nid >= MAX_NUMNODES) { + pr_warning("NUMA: Warning: invalid memblk node %d (%Lx-%Lx)\n", + nid, start, end); + return 0; } - return -1; -} - -int __init numa_add_memblk(int nid, u64 start, u64 end) -{ - struct numa_meminfo *mi = &numa_meminfo; - int i; - i = conflicting_memblks(start, end); - if (i == nid) { - printk(KERN_WARNING "NUMA: Warning: node %d (%Lx-%Lx) overlaps with itself (%Lx-%Lx)\n", - nid, start, end, numa_nodes[i].start, numa_nodes[i].end); - } else if (i >= 0) { - printk(KERN_ERR "NUMA: node %d (%Lx-%Lx) overlaps with node %d (%Lx-%Lx)\n", - nid, start, end, i, - numa_nodes[i].start, numa_nodes[i].end); + if (mi->nr_blks >= NR_NODE_MEMBLKS) { + pr_err("NUMA: too many memblk ranges\n"); return -EINVAL; } @@ -237,22 +223,6 @@ static void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi) (mi->nr_blks - idx) * sizeof(mi->blk[0])); } -static __init void cutoff_node(int i, unsigned long start, unsigned long end) -{ - struct bootnode *nd = &numa_nodes[i]; - - if (nd->start < start) { - nd->start = start; - if (nd->end < nd->start) - nd->start = nd->end; - } - if (nd->end > end) { - nd->end = end; - if (nd->start > nd->end) - nd->start = nd->end; - } -} - /* Initialize bootmem allocator for a node */ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long end) @@ -301,24 +271,53 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end) static int __init numa_cleanup_meminfo(struct numa_meminfo *mi) { + const u64 low = 0; + const u64 high = (u64)max_pfn << PAGE_SHIFT; int i, j, k; for (i = 0; i < mi->nr_blks; i++) { struct numa_memblk *bi = &mi->blk[i]; + /* make sure all blocks are inside the limits */ + bi->start = max(bi->start, low); + bi->end = min(bi->end, high); + + /* and there's no empty block */ + if (bi->start == bi->end) { + numa_remove_memblk_from(i--, mi); + continue; + } + for (j = i + 1; j < mi->nr_blks; j++) { struct numa_memblk *bj = &mi->blk[j]; unsigned long start, end; /* + * See whether there are overlapping blocks. Whine + * about but allow overlaps of the same nid. They + * will be merged below. + */ + if (bi->end > bj->start && bi->start < bj->end) { + if (bi->nid != bj->nid) { + pr_err("NUMA: node %d (%Lx-%Lx) overlaps with node %d (%Lx-%Lx)\n", + bi->nid, bi->start, bi->end, + bj->nid, bj->start, bj->end); + return -EINVAL; + } + pr_warning("NUMA: Warning: node %d (%Lx-%Lx) overlaps with itself (%Lx-%Lx)\n", + bi->nid, bi->start, bi->end, + bj->start, bj->end); + } + + /* * Join together blocks on the same node, holes * between which don't overlap with memory on other * nodes. */ if (bi->nid != bj->nid) continue; - start = min(bi->start, bj->start); - end = max(bi->end, bj->end); + start = max(min(bi->start, bj->start), low); + end = min(max(bi->end, bj->end), high); for (k = 0; k < mi->nr_blks; k++) { struct numa_memblk *bk = &mi->blk[k]; @@ -338,6 +337,11 @@ static int __init numa_cleanup_meminfo(struct numa_meminfo *mi) } } + for (i = mi->nr_blks; i < ARRAY_SIZE(mi->blk); i++) { + mi->blk[i].start = mi->blk[i].end = 0; + mi->blk[i].nid = NUMA_NO_NODE; + } + return 0; } @@ -824,10 +828,8 @@ void __init initmem_init(void) if (numa_init[i]() < 0) continue; - /* clean up the node list */ - for (j = 0; j < MAX_NUMNODES; j++) - cutoff_node(j, 0, max_pfn << PAGE_SHIFT); - + if (numa_cleanup_meminfo(&numa_meminfo) < 0) + continue; #ifdef CONFIG_NUMA_EMU setup_physnodes(0, max_pfn << PAGE_SHIFT); if (cmdline && !numa_emulation(0, max_pfn, i == 0, i == 1)) @@ -836,9 +838,6 @@ void __init initmem_init(void) nodes_clear(node_possible_map); nodes_clear(node_online_map); #endif - if (numa_cleanup_meminfo(&numa_meminfo) < 0) - continue; - if (numa_register_memblks(&numa_meminfo) < 0) continue; |