diff options
| -rw-r--r-- | arch/x86_64/mm/init.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index eca6012..ef84106 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -262,19 +262,11 @@ static void __init find_early_table_space(unsigned long end) tables = round_up(puds * sizeof(pud_t), PAGE_SIZE) + round_up(pmds * sizeof(pmd_t), PAGE_SIZE); - /* Put page tables beyond the DMA zones if possible. - RED-PEN might be better to spread them out more over - memory to avoid hotspots */ - if (end > MAX_DMA32_PFN<<PAGE_SHIFT) - start = MAX_DMA32_PFN << PAGE_SHIFT; - else if (end > MAX_DMA_PFN << PAGE_SHIFT) - start = MAX_DMA_PFN << PAGE_SHIFT; - else - start = 0x8000; - - table_start = find_e820_area(start, end, tables); - if (table_start == -1) - table_start = find_e820_area(0x8000, end, tables); + /* RED-PEN putting page tables only on node 0 could + cause a hotspot and fill up ZONE_DMA. The page tables + need roughly 0.5KB per GB. */ + start = 0x8000; + table_start = find_e820_area(start, end, tables); if (table_start == -1UL) panic("Cannot find space for the kernel page tables"); |
