diff options
| -rw-r--r-- | drivers/xen/balloon.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c index 77b5dc3597e3..2b17ad5b4b32 100644 --- a/drivers/xen/balloon.c +++ b/drivers/xen/balloon.c @@ -50,6 +50,7 @@ #include <asm/pgtable.h> #include <asm/uaccess.h> #include <asm/tlb.h> +#include <asm/e820.h> #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> @@ -391,7 +392,7 @@ static struct notifier_block xenstore_notifier; static int __init balloon_init(void) { - unsigned long pfn; + unsigned long pfn, extra_pfn_end; struct page *page; if (!xen_pv_domain()) @@ -412,8 +413,10 @@ static int __init balloon_init(void) register_balloon(&balloon_sysdev); /* Initialise the balloon with excess memory space. */ + extra_pfn_end = min(e820_end_of_ram_pfn(), + (unsigned long)PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size)); for (pfn = PFN_UP(xen_extra_mem_start); - pfn < PFN_DOWN(xen_extra_mem_start + xen_extra_mem_size); + pfn < extra_pfn_end; pfn++) { page = pfn_to_page(pfn); /* totalram_pages doesn't include the boot-time |