From 64c98e7f49100b637cd20a6c63508caed6bbba7a Mon Sep 17 00:00:00 2001 From: Malcolm Crossley Date: Mon, 28 Sep 2015 11:36:52 +0100 Subject: [PATCH] x86/xen: Do not clip xen_e820_map to xen_e820_map_entries when sanitizing map Sanitizing the e820 map may produce extra E820 entries which would result in the topmost E820 entries being removed. The removed entries would typically include the top E820 usable RAM region and thus result in the domain having signicantly less RAM available to it. Fix by allowing sanitize_e820_map to use the full size of the allocated E820 array. Signed-off-by: Malcolm Crossley Reviewed-by: Boris Ostrovsky Cc: Signed-off-by: David Vrabel --- arch/x86/xen/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 4ebfcecc2a8b..1c30e4ab1022 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -798,7 +798,7 @@ char * __init xen_memory_setup(void) xen_ignore_unusable(); /* Make sure the Xen-supplied memory map is well-ordered. */ - sanitize_e820_map(xen_e820_map, xen_e820_map_entries, + sanitize_e820_map(xen_e820_map, ARRAY_SIZE(xen_e820_map), &xen_e820_map_entries); max_pages = xen_get_max_pages(); -- 2.20.1