---

yaml
---
r: 14183
b: refs/heads/master
c: e18c687
h: refs/heads/master
i:
  14181: ecdf6db
  14179: 7919c13
  14175: 157a071
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b0d41693217b3bb5b837940dc7465e82a9d49476
+refs/heads/master: e18c6874a505958d153a11f9d6947971c349008a

trunk/arch/x86_64/mm/init.c

@@ -47,6 +47,8 @@ extern int swiotlb;
 
 extern char _stext[];
 
+static unsigned long dma_reserve __initdata;
+
 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
 
 /*
@@ -354,6 +356,21 @@ size_zones(unsigned long *z, unsigned long *h,
 		w += z[i];
 		h[i] = e820_hole_size(s, w);
 	}
+
+	/* Add the space pace needed for mem_map to the holes too. */
+	for (i = 0; i < MAX_NR_ZONES; i++)
+		h[i] += (z[i] * sizeof(struct page)) / PAGE_SIZE;
+
+	/* The 16MB DMA zone has the kernel and other misc mappings.
+ 	   Account them too */
+	if (h[ZONE_DMA]) {
+		h[ZONE_DMA] += dma_reserve;
+		if (h[ZONE_DMA] >= z[ZONE_DMA]) {
+			printk(KERN_WARNING
+				"Kernel too large and filling up ZONE_DMA?\n");
+			h[ZONE_DMA] = z[ZONE_DMA];
+		}
+	}
 }
 
 #ifndef CONFIG_NUMA
@@ -510,6 +527,8 @@ void __init reserve_bootmem_generic(unsigned long phys, unsigned len)
 #else       		
 	reserve_bootmem(phys, len);    
 #endif
+	if (phys+len <= MAX_DMA_PFN*PAGE_SIZE)
+		dma_reserve += len / PAGE_SIZE;
 }
 
 int kern_addr_valid(unsigned long addr)