diff options
| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-06-03 19:32:30 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-06-04 12:01:55 +0200 |
| commit | 84b56fa46b36c2df508e7d421feab514fad30f81 (patch) | |
| tree | 818334f7f9af6c6354a37d5a13b12ac754a1c63f /arch | |
| parent | ab530e1f781da4d704892daab2bdd568f473687d (diff) | |
x86, numa, 32-bit: make sure get we kva space
when 1/3 user/kernel split is used, and less memory is installed, or if
we have a big hole below 4g, max_low_pfn is still using 3g-128m
try to go down from max_low_pfn until we get it. otherwise will panic.
need to make 32-bit code to use register_e820_active_regions ... later.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -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); |