In this case, page_buffer content would not be used.
Skip this to save some time.
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
switch (flags & ~RAM_SAVE_FLAG_CONTINUE) {
case RAM_SAVE_FLAG_ZERO:
ch = qemu_get_byte(f);
- memset(page_buffer, ch, TARGET_PAGE_SIZE);
+ /*
+ * Can skip to set page_buffer when
+ * this is a zero page and (block->page_size == TARGET_PAGE_SIZE).
+ */
+ if (ch || !matches_target_page_size) {
+ memset(page_buffer, ch, TARGET_PAGE_SIZE);
+ }
if (ch) {
all_zero = false;
}