[PATCH] x86_64: Relax SRAT covers all memory check a bit
Code was refusing good SRATs because about 12K got lost somewhere.
Allow less than 1MB of difference before rejecting it.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index cd25300..809dc70 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -228,7 +228,8 @@
}
e820ram = end_pfn - e820_hole_size(0, end_pfn);
- if (pxmram < e820ram) {
+ /* We seem to lose 3 pages somewhere. Allow a bit of slack. */
+ if ((long)(e820ram - pxmram) >= 1*1024*1024) {
printk(KERN_ERR
"SRAT: PXMs only cover %luMB of your %luMB e820 RAM. Not used.\n",
(pxmram << PAGE_SHIFT) >> 20,