ram: Remove dirty_bytes_rate

It can be recalculated from dirty_pages_rate.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: NPeter Xu <peterx@redhat.com>

--

Dave was the one that reviewed it O:-)

include/migration/migration.h

@@ -155,7 +155,6 @@ struct MigrationState
     int64_t downtime;
     int64_t expected_downtime;
     int64_t dirty_pages_rate;
-    int64_t dirty_bytes_rate;
     bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
     int64_t xbzrle_cache_size;
     int64_t setup_time;

migration/migration.c

@@ -1118,7 +1118,6 @@ MigrationState *migrate_init(const MigrationParams *params)
     s->downtime = 0;
     s->expected_downtime = 0;
     s->dirty_pages_rate = 0;
-    s->dirty_bytes_rate = 0;
     s->setup_time = 0;
     s->start_postcopy = false;
     s->postcopy_after_devices = false;
@@ -2008,8 +2007,9 @@ static void *migration_thread(void *opaque)
                                       bandwidth, max_size);
             /* if we haven't sent anything, we don't want to recalculate
                10000 is a small enough number for our purposes */
-            if (s->dirty_bytes_rate && transferred_bytes > 10000) {
-                s->expected_downtime = s->dirty_bytes_rate / bandwidth;
+            if (s->dirty_pages_rate && transferred_bytes > 10000) {
+                s->expected_downtime = s->dirty_pages_rate *
+                    (1ul << qemu_target_page_bits()) / bandwidth;
             }
 
             qemu_file_reset_rate_limit(s->to_dst_file);

migration/ram.c

@@ -728,7 +728,6 @@ static void migration_bitmap_sync(RAMState *rs)
         }
         s->dirty_pages_rate = rs->num_dirty_pages_period * 1000
             / (end_time - rs->time_last_bitmap_sync);
-        s->dirty_bytes_rate = s->dirty_pages_rate * TARGET_PAGE_SIZE;
         rs->time_last_bitmap_sync = end_time;
         rs->num_dirty_pages_period = 0;
     }