On Thu, 2016-05-26 at 09:22 -0700, Ganapatrao Kulkarni wrote: > On Wed, May 25, 2016 at 7:43 PM, Zhen Lei <thunder.leizhen@xxxxxxxxxx> wrote: > > numa_init(of_numa_init) may returned error because of numa configuration > > error. So "No NUMA configuration found" is inaccurate. In fact, specific > > configuration error information can be immediately printed by the > > testing branch. So "No NUMA..." only needs to be printed when numa_off. [] > > diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c [] > > @@ -362,7 +362,8 @@ static int __init dummy_numa_init(void) > > int ret; > > struct memblock_region *mblk; > > > > - pr_info("%s\n", "No NUMA configuration found"); > > + if (numa_off) > IIRC, it should be > if (!numa_off) > we want to print this message when we failed to find proper numa configuration. > when numa_off is set, we will not look for any numa configuration. > > > > > + pr_info("%s\n", "No NUMA configuration found"); trivia: Using printk("%s\n", "string") just makes the object code larger for no particular benefit. pr_info("No NUMA configuration found\n"); would be smaller, faster and more intelligible for humans too. Maybe something like this: --- arch/arm64/mm/numa.c | 41 ++++++++++++++++++++--------------------- 1 file changed, 20 insertions(+), 21 deletions(-) diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index 98dc104..2042452 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -17,6 +17,8 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#define pr_fmt(fmt) "NUMA: " fmt + #include <linux/bootmem.h> #include <linux/memblock.h> #include <linux/module.h> @@ -36,7 +38,7 @@ static __init int numa_parse_early_param(char *opt) if (!opt) return -EINVAL; if (!strncmp(opt, "off", 3)) { - pr_info("%s\n", "NUMA turned off"); + pr_info("NUMA turned off\n"); numa_off = 1; } return 0; @@ -107,7 +109,7 @@ static void __init setup_node_to_cpumask_map(void) set_cpu_numa_node(cpu, NUMA_NO_NODE); /* cpumask_of_node() will now work */ - pr_debug("NUMA: Node to cpumask map for %d nodes\n", nr_node_ids); + pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids); } /* @@ -142,14 +144,14 @@ int __init numa_add_memblk(int nid, u64 start, u64 size) ret = memblock_set_node(start, size, &memblock.memory, nid); if (ret < 0) { - pr_err("NUMA: memblock [0x%llx - 0x%llx] failed to add on node %d\n", - start, (start + size - 1), nid); + pr_err("memblock [0x%llx - 0x%llx] failed to add on node %d\n", + start, (start + size - 1), nid); return ret; } node_set(nid, numa_nodes_parsed); - pr_info("NUMA: Adding memblock [0x%llx - 0x%llx] on node %d\n", - start, (start + size - 1), nid); + pr_info("Adding memblock [0x%llx - 0x%llx] on node %d\n", + start, (start + size - 1), nid); return ret; } @@ -163,19 +165,18 @@ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn) void *nd; int tnid; - pr_info("NUMA: Initmem setup node %d [mem %#010Lx-%#010Lx]\n", - nid, start_pfn << PAGE_SHIFT, - (end_pfn << PAGE_SHIFT) - 1); + pr_info("Initmem setup node %d [mem %#010Lx-%#010Lx]\n", + nid, start_pfn << PAGE_SHIFT, (end_pfn << PAGE_SHIFT) - 1); nd_pa = memblock_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid); nd = __va(nd_pa); /* report and initialize */ - pr_info("NUMA: NODE_DATA [mem %#010Lx-%#010Lx]\n", + pr_info("NODE_DATA [mem %#010Lx-%#010Lx]\n", nd_pa, nd_pa + nd_size - 1); tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT); if (tnid != nid) - pr_info("NUMA: NODE_DATA(%d) on node %d\n", nid, tnid); + pr_info("NODE_DATA(%d) on node %d\n", nid, tnid); node_data[nid] = nd; memset(NODE_DATA(nid), 0, sizeof(pg_data_t)); @@ -232,8 +233,7 @@ static int __init numa_alloc_distance(void) numa_distance[i * numa_distance_cnt + j] = i == j ? LOCAL_DISTANCE : REMOTE_DISTANCE; - pr_debug("NUMA: Initialized distance table, cnt=%d\n", - numa_distance_cnt); + pr_debug("Initialized distance table, cnt=%d\n", numa_distance_cnt); return 0; } @@ -254,20 +254,20 @@ static int __init numa_alloc_distance(void) void __init numa_set_distance(int from, int to, int distance) { if (!numa_distance) { - pr_warn_once("NUMA: Warning: distance table not allocated yet\n"); + pr_warn_once("Warning: distance table not allocated yet\n"); return; } if (from >= numa_distance_cnt || to >= numa_distance_cnt || from < 0 || to < 0) { - pr_warn_once("NUMA: Warning: node ids are out of bound, from=%d to=%d distance=%d\n", - from, to, distance); + pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n", + from, to, distance); return; } if ((u8)distance != distance || (from == to && distance != LOCAL_DISTANCE)) { - pr_warn_once("NUMA: Warning: invalid distance parameter, from=%d to=%d distance=%d\n", + pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n", from, to, distance); return; } @@ -294,7 +294,7 @@ static int __init numa_register_nodes(void) /* Check that valid nid is set to memblks */ for_each_memblock(memory, mblk) if (mblk->nid == NUMA_NO_NODE || mblk->nid >= MAX_NUMNODES) { - pr_warn("NUMA: Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", + pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", mblk->nid, mblk->base, mblk->base + mblk->size - 1); return -EINVAL; @@ -362,9 +362,8 @@ static int __init dummy_numa_init(void) int ret; struct memblock_region *mblk; - pr_info("%s\n", "No NUMA configuration found"); - pr_info("NUMA: Faking a node at [mem %#018Lx-%#018Lx]\n", - 0LLU, PFN_PHYS(max_pfn) - 1); + pr_info("No NUMA configuration found - faking a node at [mem %#018Lx-%#018Lx]\n", + 0LLU, PFN_PHYS(max_pfn) - 1); for_each_memblock(memory, mblk) { ret = numa_add_memblk(0, mblk->base, mblk->size); -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html