[Qemu-devel] [PATCH] Fix calculation of number of bits in the migration bitmap

[Orit Wasserman]

The number of bits is off by one, for example if last_ram_offset
is 0x1000 (the guest has one page) we get 0 bits instead of 1.

Signed-off-by: Orit Wasserman <owass...@redhat.com>
---
 arch_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch_init.c b/arch_init.c
index b75a4c5..a80c3c8 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -565,7 +565,7 @@ static void reset_ram_globals(void)
 static int ram_save_setup(QEMUFile *f, void *opaque)
 {
     RAMBlock *block;
-    int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
+    int64_t ram_pages = (last_ram_offset() >> TARGET_PAGE_BITS) + 1;
 
     migration_bitmap = bitmap_new(ram_pages);
     bitmap_set(migration_bitmap, 0, ram_pages);
-- 
1.7.11.7