From: Honggang Li <enjoymind...@gmail.com>
1) uml kernel bootmem managed through bootmem_data->node_bootmem_map,
not the struct page array, so the array is unnecessary.
2) the bootmem struct page array has been pointed by a *local* pointer,
struct page *map, in init_maps function. The array can be accessed only
in init_maps's scope. As a result, uml kernel wastes about 1% of total
memory.
Signed-off-by: Honggang Li <enjoymind...@gmail.com>
---
arch/um/kernel/um_arch.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 6043c76..5aa2d82 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -338,12 +338,6 @@ int __init linux_main(int argc, char **argv)
start_vm = VMALLOC_START;
setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
- if (init_maps(physmem_size, iomem_size, highmem)) {
- printf("Failed to allocate mem_map for %Lu bytes of physical "
- "memory and %Lu bytes of highmem\n", physmem_size,
- highmem);
- exit(1);
- }
virtmem_size = physmem_size;
stack = (unsigned long) argv;
--
1.8.3.1
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