Merge 10.5 into 10.6

sql/signal_handler.cc

@@ -192,16 +192,18 @@ extern "C" sig_handler handle_fatal_signal(int sig)
 
   if (dflt_key_cache && thread_scheduler)
   {
+    size_t used_mem=
+        (dflt_key_cache->key_cache_mem_size +
+         (global_system_variables.read_buff_size +
+          (size_t) global_system_variables.sortbuff_size) *
+             (thread_scheduler->max_threads + extra_max_connections) +
+         (max_connections + extra_max_connections) * sizeof(THD)) / 1024;
+
     my_safe_printf_stderr("It is possible that mysqld could use up to \n"
                           "key_buffer_size + "
                           "(read_buffer_size + sort_buffer_size)*max_threads = "
-                          "%zu K  bytes of memory\n",
-                          (dflt_key_cache->key_cache_mem_size +
-                           (global_system_variables.read_buff_size +
-                            (size_t)global_system_variables.sortbuff_size) *
-                           (thread_scheduler->max_threads + extra_max_connections) +
-                           (max_connections + extra_max_connections) *
-                           sizeof(THD)) / 1024);
+                          "%zu K  bytes of memory\n", used_mem);
+
     my_safe_printf_stderr("%s",
                           "Hope that's ok; if not, decrease some variables in "
                           "the equation.\n\n");

storage/innobase/buf/buf0dump.cc

@@ -721,6 +721,10 @@ buf_load()
 
 	ut_free(dump);
 
+	if (i == dump_n) {
+		os_aio_wait_until_no_pending_reads();
+	}
+
 	ut_sprintf_timestamp(now);
 
 	if (i == dump_n) {

storage/innobase/os/os0file.cc

@@ -3817,7 +3817,15 @@ void os_aio_wait_until_no_pending_writes()
 /** Wait until all pending asynchronous reads have completed. */
 void os_aio_wait_until_no_pending_reads()
 {
+  const auto notify_wait= read_slots->pending_io_count();
+
+  if (notify_wait)
+    tpool::tpool_wait_begin();
+
   read_slots->wait();
+
+  if (notify_wait)
+    tpool::tpool_wait_end();
 }
 
 /** Request a read or write.