It will return 0 if the page is unmodifed. Signed-off-by: Orit Wasserman <owass...@redhat.com> --- arch_init.c | 11 +++++++---- 1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch_init.c b/arch_init.c index ee20c33..e763909 100644 --- a/arch_init.c +++ b/arch_init.c @@ -188,7 +188,7 @@ static int ram_save_block(QEMUFile *f) { RAMBlock *block = last_block; ram_addr_t offset = last_offset; - int bytes_sent = 0; + int bytes_sent = -1; MemoryRegion *mr; if (!block) @@ -354,8 +354,11 @@ int ram_save_live(QEMUFile *f, int stage, void *opaque) int bytes_sent; bytes_sent = ram_save_block(f); - bytes_transferred += bytes_sent; - if (bytes_sent == 0) { /* no more blocks */ + /* 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)) != -1) { bytes_transferred += bytes_sent; } memory_global_dirty_log_stop(); -- 1.7.7.6