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memory: only resize dirty bitmap when memory size increases 

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
This commit is contained in:
Juan Quintela 2013-10-08 13:52:02 +02:00
parent 7a5b558c9d
commit 2152f5ca78
1 changed files with 9 additions and 3 deletions
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12
exec.c
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@ -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);