Tune unmount_all() function

atrosinenko · Sep 24, 2023 · d305082 · d305082
1 parent 2fa8395
commit d305082
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/runtime/common/kernel.c b/runtime/common/kernel.c
@@ -124,14 +124,16 @@ static void unmount_all(struct fuzzer_state *state) {
     if (strncmp(partition->fstype, FSTYPE_RAW, strlen(FSTYPE_RAW)) == 0) {
       continue;
     }
-    int ret = lkl_umount_dev(partition->blockdev.lkl_disk_id, 0, 0, 1);
+    int ret = lkl_umount_dev(partition->blockdev.lkl_disk_id, 0, 0, 10 * 1000 /* prevent unstable results if too small timeout */);
     if (ret) {
       // TODO
       WARN(state, "Cannot unmount #%d, type = %s (%s), just exiting...",
            part, partition->fstype, lkl_strerror(ret));
       stop_processing(state);
     }
   }
+  INVOKE_SYSCALL_0(state, sync);
+  kernel_write_string_to_file(state, "/proc/sys/vm/drop_caches", "3", false);
 }
 
 static void mount_all(struct fuzzer_state *state)