Signed-off-by: Juan Quintela <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
exec.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/exec.c b/exec.c
index 9996da2..bed5c07 100644
--- a/exec.c
+++ b/exec.c
@@ -1210,6 +1210,9 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void
*host,
MemoryRegion *mr)
{
RAMBlock *block, *new_block;
+ ram_addr_t old_ram_size, new_ram_size;
+
+ old_ram_size = last_ram_offset() >> TARGET_PAGE_BITS;
size = TARGET_PAGE_ALIGN(size);
new_block = g_malloc0(sizeof(*new_block));
@@ -1270,10 +1273,13 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size,
void *host,
ram_list.version++;
qemu_mutex_unlock_ramlist();
- ram_list.phys_dirty = g_realloc(ram_list.phys_dirty,
- last_ram_offset() >> TARGET_PAGE_BITS);
- memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
+ new_ram_size = last_ram_offset() >> TARGET_PAGE_BITS;
+
+ if (new_ram_size > old_ram_size) {
+ ram_list.phys_dirty = g_realloc(ram_list.phys_dirty, new_ram_size);
+ memset(ram_list.phys_dirty + (new_block->offset >> TARGET_PAGE_BITS),
0, size >> TARGET_PAGE_BITS);
+ }
cpu_physical_memory_set_dirty_range(new_block->offset, size);
qemu_ram_setup_dump(new_block->host, size);