X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=arch%2Fx86_64%2Fmm%2Finit.c;h=ef84106c1509b5d0b74b6f35d053ae0a95ee7c67;hb=ee408c79420b6a437332d6977fe33ab72c36dc97;hp=eca60125efc3b76a5e8145829f362f031757d35e;hpb=593195f9b2309693f27b402f34573f7920b82c3e;p=karo-tx-linux.git

diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index eca60125efc3..ef84106c1509 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");