migration: Make dirty_pages_rate atomic

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>

---

Don't use __nocheck() variants
Use stat64_get()

1 files changed, 4 insertions, 2 deletions

diff --git a/migration/migration.c b/migration/migration.c
index 3adcdfe286..9367bb2afc 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -958,7 +958,8 @@ 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 = ram_counters.dirty_pages_rate;
+        info->ram->dirty_pages_rate =
+           stat64_get(&ram_counters.dirty_pages_rate);
     }
 }
 
@@ -2689,7 +2690,8 @@ static void migration_update_counters(MigrationState *s,
      * if we haven't sent anything, we don't want to
      * recalculate. 10000 is a small enough number for our purposes
      */
-    if (ram_counters.dirty_pages_rate && transferred > 10000) {
+    if (stat64_get(&ram_counters.dirty_pages_rate) &&
+        transferred > 10000) {
         s->expected_downtime = ram_counters.remaining / bandwidth;
     }