diff options
author | Mike Kravetz <kravetz@us.ibm.com> | 2005-12-05 12:06:42 -0800 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2006-01-09 14:51:57 +1100 |
commit | 237a0989e2902b7d43c4228a36d82f8691fb2118 (patch) | |
tree | 411b5e4978ac15ab283378610fef3941c880711a /arch/powerpc | |
parent | b5666f70395016a55cc9d57826508b8a346398d0 (diff) | |
download | kernel_samsung_smdk4412-237a0989e2902b7d43c4228a36d82f8691fb2118.zip kernel_samsung_smdk4412-237a0989e2902b7d43c4228a36d82f8691fb2118.tar.gz kernel_samsung_smdk4412-237a0989e2902b7d43c4228a36d82f8691fb2118.tar.bz2 |
[PATCH] powerpc: numa placement for dynamically added memory
This places dynamically added memory within the appropriate
numa node. A new routine hot_add_scn_to_nid() replicates most of
the memory scanning code in parse_numa_properties().
Signed-off-by: Mike Kravetz <kravetz@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/mm/mem.c | 11 | ||||
-rw-r--r-- | arch/powerpc/mm/numa.c | 57 |
2 files changed, 57 insertions, 11 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index ed6ed2e..5e5bff5 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -114,18 +114,17 @@ void online_page(struct page *page) num_physpages++; } -/* - * This works only for the non-NUMA case. Later, we'll need a lookup - * to convert from real physical addresses to nid, that doesn't use - * pfn_to_nid(). - */ int __devinit add_memory(u64 start, u64 size) { - struct pglist_data *pgdata = NODE_DATA(0); + struct pglist_data *pgdata; struct zone *zone; + int nid; unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; + nid = hot_add_scn_to_nid(start); + pgdata = NODE_DATA(nid); + start += KERNELBASE; create_section_mapping(start, start + size); diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index e812d3d..40c99de 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -37,6 +37,7 @@ EXPORT_SYMBOL(node_data); static bootmem_data_t __initdata plat_node_bdata[MAX_NUMNODES]; static int min_common_depth; +static int n_mem_addr_cells, n_mem_size_cells; /* * We need somewhere to store start/end/node for each region until we have @@ -267,7 +268,7 @@ static void __init get_n_mem_cells(int *n_addr_cells, int *n_size_cells) of_node_put(memory); } -static unsigned long __init read_n_cells(int n, unsigned int **buf) +static unsigned long __devinit read_n_cells(int n, unsigned int **buf) { unsigned long result = 0; @@ -374,7 +375,6 @@ static int __init parse_numa_properties(void) { struct device_node *cpu = NULL; struct device_node *memory = NULL; - int n_addr_cells, n_size_cells; int max_domain; unsigned long i; @@ -413,7 +413,7 @@ static int __init parse_numa_properties(void) } } - get_n_mem_cells(&n_addr_cells, &n_size_cells); + get_n_mem_cells(&n_mem_addr_cells, &n_mem_size_cells); memory = NULL; while ((memory = of_find_node_by_type(memory, "memory")) != NULL) { unsigned long start; @@ -430,8 +430,8 @@ static int __init parse_numa_properties(void) ranges = memory->n_addrs; new_range: /* these are order-sensitive, and modify the buffer pointer */ - start = read_n_cells(n_addr_cells, &memcell_buf); - size = read_n_cells(n_size_cells, &memcell_buf); + start = read_n_cells(n_mem_addr_cells, &memcell_buf); + size = read_n_cells(n_mem_size_cells, &memcell_buf); numa_domain = of_node_numa_domain(memory); @@ -717,3 +717,50 @@ static int __init early_numa(char *p) return 0; } early_param("numa", early_numa); + +#ifdef CONFIG_MEMORY_HOTPLUG +/* + * Find the node associated with a hot added memory section. Section + * corresponds to a SPARSEMEM section, not an LMB. It is assumed that + * sections are fully contained within a single LMB. + */ +int hot_add_scn_to_nid(unsigned long scn_addr) +{ + struct device_node *memory = NULL; + + if (!numa_enabled || (min_common_depth < 0)) + return 0; + + while ((memory = of_find_node_by_type(memory, "memory")) != NULL) { + unsigned long start, size; + int numa_domain, ranges; + unsigned int *memcell_buf; + unsigned int len; + + memcell_buf = (unsigned int *)get_property(memory, "reg", &len); + if (!memcell_buf || len <= 0) + continue; + + ranges = memory->n_addrs; /* ranges in cell */ +ha_new_range: + start = read_n_cells(n_mem_addr_cells, &memcell_buf); + size = read_n_cells(n_mem_size_cells, &memcell_buf); + numa_domain = of_node_numa_domain(memory); + + /* Domains not present at boot default to 0 */ + if (!node_online(numa_domain)) + numa_domain = any_online_node(NODE_MASK_ALL); + + if ((scn_addr >= start) && (scn_addr < (start + size))) { + of_node_put(memory); + return numa_domain; + } + + if (--ranges) /* process all ranges in cell */ + goto ha_new_range; + } + + BUG(); /* section address should be found above */ + return 0; +} +#endif /* CONFIG_MEMORY_HOTPLUG */ |