diff options
Diffstat (limited to 'arch/x86/mm/discontig_32.c')
| -rw-r--r-- | arch/x86/mm/discontig_32.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c index 914a81ee785..7ced26ab9ae 100644 --- a/arch/x86/mm/discontig_32.c +++ b/arch/x86/mm/discontig_32.c @@ -328,6 +328,7 @@ unsigned long __init setup_memory(void) { int nid; unsigned long system_start_pfn, system_max_low_pfn; + long kva_target_pfn; /* * When mapping a NUMA machine we allocate the node_mem_map arrays @@ -344,11 +345,17 @@ unsigned long __init setup_memory(void) system_start_pfn = min_low_pfn = PFN_UP(init_pg_tables_end); system_max_low_pfn = max_low_pfn = find_max_low_pfn(); - kva_start_pfn = round_down(max_low_pfn - kva_pages, PTRS_PER_PTE); - kva_start_pfn = find_e820_area(kva_start_pfn<<PAGE_SHIFT, - max_low_pfn<<PAGE_SHIFT, - kva_pages<<PAGE_SHIFT, - PTRS_PER_PTE<<PAGE_SHIFT) >> PAGE_SHIFT; + kva_target_pfn = round_down(max_low_pfn - kva_pages, PTRS_PER_PTE); + do { + kva_start_pfn = find_e820_area(kva_target_pfn<<PAGE_SHIFT, + max_low_pfn<<PAGE_SHIFT, + kva_pages<<PAGE_SHIFT, + PTRS_PER_PTE<<PAGE_SHIFT) >> PAGE_SHIFT; + kva_target_pfn -= PTRS_PER_PTE; + } while (kva_start_pfn == -1UL && kva_target_pfn > min_low_pfn); + + if (kva_start_pfn == -1UL) + panic("Can not get kva space\n"); printk("kva_start_pfn ~ %ld find_max_low_pfn() ~ %ld\n", kva_start_pfn, max_low_pfn); |