It will return 0 if the page is unmodifed.
Signed-off-by: Orit Wasserman <owass...@redhat.com>
---
arch_init.c | 15 +++++++++------
1 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/arch_init.c b/arch_init.c
index fbed5ea..c9ab66a 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -184,11 +184,11 @@ static void save_block_hdr(QEMUFile *f, RAMBlock *block,
ram_addr_t offset,
static RAMBlock *last_block;
static ram_addr_t last_offset;
-static int ram_save_block(QEMUFile *f)
+static int ram_save_block(QEMUFile *f, int stage)
{
RAMBlock *block = last_block;
ram_addr_t offset = last_offset;
- int bytes_sent = 0;
+ int bytes_sent = -1;
MemoryRegion *mr;
if (!block)
@@ -353,9 +353,12 @@ int ram_save_live(QEMUFile *f, int stage, void *opaque)
while ((ret = qemu_file_rate_limit(f)) == 0) {
int bytes_sent;
- bytes_sent = ram_save_block(f);
- bytes_transferred += bytes_sent;
- if (bytes_sent == 0) { /* no more blocks */
+ bytes_sent = ram_save_block(f, stage);
+ /* bytes_sent 0 represent unchanged page,
+ bytes_sent -1 represent no more blocks*/
+ if (bytes_sent > 0) {
+ bytes_transferred += bytes_sent;
+ } else if (bytes_sent == -1) { /* no more blocks */
break;
}
}
@@ -378,7 +381,7 @@ int ram_save_live(QEMUFile *f, int stage, void *opaque)
int bytes_sent;
/* flush all remaining blocks regardless of rate limiting */
- while ((bytes_sent = ram_save_block(f)) != 0) {
+ while ((bytes_sent = ram_save_block(f, stage)) != -1) {
bytes_transferred += bytes_sent;
}
memory_global_dirty_log_stop();
--
1.7.7.6
