Fix too agressive long semaphore wait output and add guard against introducing

compression failures on insert buffer.

mysql-test/include/mtr_warnings.sql

@@ -159,6 +159,7 @@ INSERT INTO global_suppressions VALUES
  ("InnoDB: Error: in ALTER TABLE `test`.`t[123]`"),
  ("InnoDB: Error: in RENAME TABLE table `test`.`t1`"),
  ("InnoDB: Error: table `test`.`t[123]` .*does not exist in the InnoDB internal"),
+ ("InnoDB: Warning: semaphore wait:"),
 
  /*
    BUG#32080 - Excessive warnings on Solaris: setrlimit could not

storage/innobase/page/page0zip.c

@@ -1272,6 +1272,7 @@ page_zip_compress(
 	records. */
 
 	if (srv_simulate_comp_failures
+	    && !dict_index_is_ibuf(index)
 	    && page_get_n_recs(page) >= 2
 	    && ((ulint)(rand() % 100) < srv_simulate_comp_failures)) {
 

storage/innobase/sync/sync0arr.c

@@ -971,27 +971,6 @@ sync_array_print_long_waits(
 			      stderr);
 			sync_array_cell_print(stderr, cell, &reserver);
 			noticed = TRUE;
-		} else {
-			fputs("InnoDB: Warning: semaphore wait:\n",
-			      stderr);
-			sync_array_cell_print(stderr, cell, &reserver);
-		}
-
-		/* Try to output cell information for writer recursive way */
-		while (reserver != 0) {
-			sync_cell_t* reserver_wait;
-
-			reserver_wait = sync_array_find_thread(sync_primary_wait_array, reserver);
-
-			if (reserver_wait &&
-			    reserver_wait->wait_object != NULL &&
-			    reserver_wait->waiting) {
-				fputs("InnoDB: Warning: Writer thread is waiting this semaphore:\n",
-				      stderr);
-				sync_array_cell_print(stderr, reserver_wait, &reserver);
-			} else {
-				reserver = 0;
-			}
 		}
 
 		if (diff > fatal_timeout) {
@@ -1005,6 +984,46 @@ sync_array_print_long_waits(
 		}
 	}
 
+	/* We found a long semaphore wait, wait all threads that are
+	waiting for a semaphore. */
+	if (noticed) {
+		for (i = 0; i < sync_primary_wait_array->n_cells; i++) {
+			void*	wait_object;
+			os_thread_id_t reserver=0;
+
+			cell = sync_array_get_nth_cell(sync_primary_wait_array, i);
+
+			wait_object = cell->wait_object;
+
+			if (wait_object == NULL || !cell->waiting) {
+
+				continue;
+			}
+
+			fputs("InnoDB: Warning: semaphore wait:\n",
+			      stderr);
+			sync_array_cell_print(stderr, cell, &reserver);
+			noticed = TRUE;
+
+			/* Try to output cell information for writer recursive way */
+			while (reserver != 0) {
+				sync_cell_t* reserver_wait;
+
+				reserver_wait = sync_array_find_thread(sync_primary_wait_array, reserver);
+
+				if (reserver_wait &&
+					reserver_wait->wait_object != NULL &&
+					reserver_wait->waiting) {
+					fputs("InnoDB: Warning: Writer thread is waiting this semaphore:\n",
+						stderr);
+					sync_array_cell_print(stderr, reserver_wait, &reserver);
+				} else {
+					reserver = 0;
+				}
+			}
+		}
+	}
+
 	sync_array_exit(sync_primary_wait_array);
 
 	if (noticed) {

storage/xtradb/page/page0zip.c

@@ -1276,6 +1276,7 @@ page_zip_compress(
 	records. */
 
 	if (srv_simulate_comp_failures
+	    && !dict_index_is_ibuf(index)
 	    && page_get_n_recs(page) >= 2
 	    && ((ulint)(rand() % 100) < srv_simulate_comp_failures)) {
 

storage/xtradb/sync/sync0arr.c

@@ -995,27 +995,6 @@ sync_array_print_long_waits(
 			      stderr);
 			sync_array_cell_print(stderr, cell, &reserver);
 			noticed = TRUE;
-		} else {
-			fputs("InnoDB: Warning: semaphore wait:\n",
-			      stderr);
-			sync_array_cell_print(stderr, cell, &reserver);
-		}
-
-		/* Try to output cell information for writer recursive way */
-		while (reserver != 0) {
-			sync_cell_t* reserver_wait;
-
-			reserver_wait = sync_array_find_thread(sync_primary_wait_array, reserver);
-
-			if (reserver_wait &&
-			    reserver_wait->wait_object != NULL &&
-			    reserver_wait->waiting) {
-				fputs("InnoDB: Warning: Writer thread is waiting this semaphore:\n",
-				      stderr);
-				sync_array_cell_print(stderr, reserver_wait, &reserver);
-			} else {
-				reserver = 0;
-			}
 		}
 
 		if (diff > fatal_timeout) {
@@ -1029,6 +1008,46 @@ sync_array_print_long_waits(
 		}
 	}
 
+	/* We found a long semaphore wait, wait all threads that are
+	waiting for a semaphore. */
+	if (noticed) {
+		for (i = 0; i < sync_primary_wait_array->n_cells; i++) {
+			void*	wait_object;
+			os_thread_id_t reserver=0;
+
+			cell = sync_array_get_nth_cell(sync_primary_wait_array, i);
+
+			wait_object = cell->wait_object;
+
+			if (wait_object == NULL || !cell->waiting) {
+
+				continue;
+			}
+
+			fputs("InnoDB: Warning: semaphore wait:\n",
+			      stderr);
+			sync_array_cell_print(stderr, cell, &reserver);
+			noticed = TRUE;
+
+			/* Try to output cell information for writer recursive way */
+			while (reserver != 0) {
+				sync_cell_t* reserver_wait;
+
+				reserver_wait = sync_array_find_thread(sync_primary_wait_array, reserver);
+
+				if (reserver_wait &&
+					reserver_wait->wait_object != NULL &&
+					reserver_wait->waiting) {
+					fputs("InnoDB: Warning: Writer thread is waiting this semaphore:\n",
+						stderr);
+					sync_array_cell_print(stderr, reserver_wait, &reserver);
+				} else {
+					reserver = 0;
+				}
+			}
+		}
+	}
+
 	sync_array_exit(sync_primary_wait_array);
 
 	if (noticed) {