x86_64: fix setup_node_bootmem to support big mem excluding with memmap

typical case: four sockets system, every node has 4g ram, and we are using:

	memmap=10g$4g

to mask out memory on node1 and node2

when numa is enabled, early_node_mem is used to get node_data and node_bootmap.

if it can not get memory from the same node with find_e820_area(), it will
use alloc_bootmem to get buff from previous nodes.

so check it and print out some info about it.

need to move early_res_to_bootmem into every setup_node_bootmem.
and it takes range that node has. otherwise alloc_bootmem could return addr
that reserved early.

depends on "mm: make reserve_bootmem can crossed the nodes".

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 10 insertions, 6 deletions

diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c
index 79f0d52fa99a..645ee5e32a27 100644
--- a/arch/x86/kernel/e820_64.c
+++ b/arch/x86/kernel/e820_64.c
@@ -106,14 +106,19 @@ void __init free_early(unsigned long start, unsigned long end)
         early_res[j - 1].end = 0;
 }
 
-void __init early_res_to_bootmem(void)
+void __init early_res_to_bootmem(unsigned long start, unsigned long end)
 {
         int i;
+        unsigned long final_start, final_end;
         for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) {
                 struct early_res *r = &early_res[i];
-                printk(KERN_INFO "early res: %d [%lx-%lx] %s\n", i,
-                        r->start, r->end - 1, r->name);
-                reserve_bootmem_generic(r->start, r->end - r->start);
+                final_start = max(start, r->start);
+                final_end = min(end, r->end);
+                if (final_start >= final_end)
+                        continue;
+                printk(KERN_INFO "  early res: %d [%lx-%lx] %s\n", i,
+                        final_start, final_end - 1, r->name);
+                reserve_bootmem_generic(final_start, final_end - final_start);
         }
 }
 
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c
index b04e2c011e1a..60e64c8eee92 100644
--- a/arch/x86/kernel/setup_64.c
+++ b/arch/x86/kernel/setup_64.c
@@ -190,6 +190,7 @@ contig_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
         bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, end_pfn);
         e820_register_active_regions(0, start_pfn, end_pfn);
         free_bootmem_with_active_regions(0, end_pfn);
+        early_res_to_bootmem(0, end_pfn<<PAGE_SHIFT);
         reserve_bootmem(bootmap, bootmap_size, BOOTMEM_DEFAULT);
 }
 #endif
@@ -421,8 +422,6 @@ void __init setup_arch(char **cmdline_p)
         contig_initmem_init(0, end_pfn);
 #endif
 
-        early_res_to_bootmem();
-
         dma32_reserve_bootmem();
 
 #ifdef CONFIG_ACPI_SLEEP