[33/51] ram: Move dirty_pages_rate to RAMState

diff --git a/include/migration/migration.h b/include/migration/migration.h
index 0d5d5fc..ffa7944 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -154,7 +154,6 @@  struct MigrationState
     int64_t total_time;
     int64_t downtime;
     int64_t expected_downtime;
-    int64_t dirty_pages_rate;
     bool enabled_capabilities[MIGRATION_CAPABILITY__MAX];
     int64_t xbzrle_cache_size;
     int64_t setup_time;
@@ -254,6 +253,7 @@  uint64_t ram_bytes_remaining(void);
 uint64_t ram_bytes_transferred(void);
 uint64_t ram_bytes_total(void);
 uint64_t ram_dirty_sync_count(void);
+uint64_t ram_dirty_pages_rate(void);
 void free_xbzrle_decoded_buf(void);
 
 void acct_update_position(QEMUFile *f, size_t size, bool zero);
diff --git a/migration/migration.c b/migration/migration.c
index 4af934b..d2d9b91 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -653,7 +653,7 @@  static void populate_ram_info(MigrationInfo *info, MigrationState *s)
 
     if (s->state != MIGRATION_STATUS_COMPLETED) {
         info->ram->remaining = ram_bytes_remaining();
-        info->ram->dirty_pages_rate = s->dirty_pages_rate;
+        info->ram->dirty_pages_rate = ram_dirty_pages_rate();
     }
 }
 
@@ -1109,7 +1109,6 @@  MigrationState *migrate_init(const MigrationParams *params)
     s->mbps = 0.0;
     s->downtime = 0;
     s->expected_downtime = 0;
-    s->dirty_pages_rate = 0;
     s->setup_time = 0;
     s->start_postcopy = false;
     s->postcopy_after_devices = false;
@@ -1999,8 +1998,8 @@  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_pages_rate && transferred_bytes > 10000) {
-                s->expected_downtime = s->dirty_pages_rate *
+            if (ram_dirty_pages_rate() && transferred_bytes > 10000) {
+                s->expected_downtime = ram_dirty_pages_rate() *
                     (1ul << qemu_target_page_bits()) / bandwidth;
             }
 
diff --git a/migration/ram.c b/migration/ram.c
index c66c308..6cb1435 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -211,6 +211,8 @@  struct RAMState {
     uint64_t migration_dirty_pages;
     /* total number of bytes transferred */
     uint64_t bytes_transferred;
+    /* number of dirtied pages in the last second */
+    uint64_t dirty_pages_rate;
     /* protects modification of the bitmap */
     QemuMutex bitmap_mutex;
     /* Ram Bitmap protected by RCU */
@@ -275,6 +277,11 @@  uint64_t ram_dirty_sync_count(void)
     return ram_state.bitmap_sync_count;
 }
 
+uint64_t ram_dirty_pages_rate(void)
+{
+    return ram_state.dirty_pages_rate;
+}
+
 /* used by the search for pages to send */
 struct PageSearchStatus {
     /* Current block being searched */
@@ -665,7 +672,6 @@  uint64_t ram_pagesize_summary(void)
 static void migration_bitmap_sync(RAMState *rs)
 {
     RAMBlock *block;
-    MigrationState *s = migrate_get_current();
     int64_t end_time;
     int64_t bytes_xfer_now;
 
@@ -704,7 +710,7 @@  static void migration_bitmap_sync(RAMState *rs)
                throttling */
             bytes_xfer_now = ram_bytes_transferred();
 
-            if (s->dirty_pages_rate &&
+            if (rs->dirty_pages_rate &&
                (rs->num_dirty_pages_period * TARGET_PAGE_SIZE >
                    (bytes_xfer_now - rs->bytes_xfer_prev) / 2) &&
                (rs->dirty_rate_high_cnt++ >= 2)) {
@@ -725,7 +731,7 @@  static void migration_bitmap_sync(RAMState *rs)
             rs->iterations_prev = rs->iterations;
             rs->xbzrle_cache_miss_prev = rs->xbzrle_cache_miss;
         }
-        s->dirty_pages_rate = rs->num_dirty_pages_period * 1000
+        rs->dirty_pages_rate = rs->num_dirty_pages_period * 1000
             / (end_time - rs->start_time);
         rs->start_time = end_time;
         rs->num_dirty_pages_period = 0;