[PATCH 14/33] x86-64, NUMA: Unify use of memblk in all init methods

Tejun Heo
2011-02-16T12:21:45Z

Make both amd and dummy use numa_add_memblk() to describe the detected
memory blocks. This allows initmem_init() to call
numa_register_memblk() regardless of init method in use. Drop custom
memory registration codes from amd and dummy.

After this change, memblk merge/cleanup in numa_register_memblks() is
applied to all init methods.

As this makes compute_hash_shift() and numa_register_memblks() used
only inside numa_64.c, make them static.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/include/asm/numa_64.h | 4 ----
arch/x86/mm/amdtopology_64.c | 13 +------------
arch/x86/mm/numa_64.c | 15 +++++++--------
arch/x86/mm/srat_64.c | 5 -----
4 files changed, 8 insertions(+), 29 deletions(-)

diff --git a/arch/x86/include/asm/numa_64.h b/arch/x86/include/asm/numa_64.h
index 2b6a1c5..fbc9d33 100644
--- a/arch/x86/include/asm/numa_64.h
+++ b/arch/x86/include/asm/numa_64.h
@@ -8,9 +8,6 @@ struct bootnode {
u64 end;
};

-extern int compute_hash_shift(struct bootnode *nodes, int numblks,
- int *nodeids);
-
#define ZONE_ALIGN (1UL << (MAX_ORDER+PAGE_SHIFT))

extern int numa_off;
@@ -34,7 +31,6 @@ extern struct bootnode numa_nodes[MAX_NUMNODES] __initdata;

extern int __cpuinit numa_cpu_node(int cpu);
extern int __init numa_add_memblk(int nodeid, u64 start, u64 end);
-extern int __init numa_register_memblks(void);

#ifdef CONFIG_NUMA_EMU
#define FAKE_NODE_MIN_SIZE ((u64)32 << 20)
diff --git a/arch/x86/mm/amdtopology_64.c b/arch/x86/mm/amdtopology_64.c
index cf29527..d6d7aa4 100644
--- a/arch/x86/mm/amdtopology_64.c
+++ b/arch/x86/mm/amdtopology_64.c
@@ -167,6 +167,7 @@ int __init amd_numa_init(void)

numa_nodes[nodeid].start = base;
numa_nodes[nodeid].end = limit;
+ numa_add_memblk(nodeid, base, limit);

prevbase = base;

@@ -263,18 +264,6 @@ int __init amd_scan_nodes(void)
{
int i;

- memnode_shift = compute_hash_shift(numa_nodes, 8, NULL);
- if (memnode_shift < 0) {
- pr_err("No NUMA node hash function found. Contact maintainer\n");
- return -1;
- }
- pr_info("Using node hash shift of %d\n", memnode_shift);
-
- /* use the coreid bits from early_identify_cpu */
- for_each_node_mask(i, node_possible_map)
- memblock_x86_register_active_regions(i,
- numa_nodes[i].start >> PAGE_SHIFT,
- numa_nodes[i].end >> PAGE_SHIFT);
init_memory_mapping_high();
for_each_node_mask(i, node_possible_map)
setup_node_bootmem(i, numa_nodes[i].start, numa_nodes[i].end);
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index a1d702d..552080e 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -131,8 +131,8 @@ static int __init extract_lsb_from_nodes(const struct bootnode *nodes,
return i;
}

-int __init compute_hash_shift(struct bootnode *nodes, int numnodes,
- int *nodeids)
+static int __init compute_hash_shift(struct bootnode *nodes, int numnodes,
+ int *nodeids)
{
int shift;

@@ -287,7 +287,7 @@ setup_node_bootmem(int nodeid, unsigned long start, unsigned long end)
node_set_online(nodeid);
}

-int __init numa_register_memblks(void)
+static int __init numa_register_memblks(void)
{
int i;

@@ -713,17 +713,13 @@ static int dummy_numa_init(void)

node_set(0, cpu_nodes_parsed);
node_set(0, mem_nodes_parsed);
+ numa_add_memblk(0, 0, (u64)max_pfn << PAGE_SHIFT);

return 0;
}

static int dummy_scan_nodes(void)
{
- /* setup dummy node covering all memory */
- memnode_shift = 63;
- memnodemap = memnode.embedded_map;
- memnodemap[0] = 0;
- memblock_x86_register_active_regions(0, 0, max_pfn);
init_memory_mapping_high();
setup_node_bootmem(0, 0, max_pfn << PAGE_SHIFT);
numa_init_array();
@@ -784,6 +780,9 @@ void __init initmem_init(void)
if (WARN_ON(nodes_empty(node_possible_map)))
continue;

+ if (numa_register_memblks() < 0)
+ continue;
+
if (!scan_nodes[i]())
return;
}
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 341b371..69f1471 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -308,11 +308,6 @@ int __init acpi_scan_nodes(void)
if (acpi_numa <= 0)
return -1;

- if (numa_register_memblks() < 0) {
- bad_srat();
- return -1;
- }
-
/* for out of order entries in SRAT */
sort_node_map();
if (!nodes_cover_memory(numa_nodes)) {
--
1.7.1