From 2152f5ca782e51a4d05a1f7d9bfa83286323cbc9 Mon Sep 17 00:00:00 2001 From: Juan Quintela Date: Tue, 8 Oct 2013 13:52:02 +0200 Subject: [PATCH] memory: only resize dirty bitmap when memory size increases Signed-off-by: Juan Quintela Reviewed-by: Eric Blake Reviewed-by: Orit Wasserman --- exec.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/exec.c b/exec.c index 82aca4ad37..db369dc42f 100644 --- a/exec.c +++ b/exec.c @@ -1211,6 +1211,9 @@ 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)); @@ -1271,10 +1274,13 @@ 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);