+int file_invalidate_cache(struct thread_data *td, struct fio_file *f)
+{
+ int ret = 0;
+
+ /*
+ * FIXME: add blockdev flushing too
+ */
+ if (td->io_ops->flags & FIO_MMAPIO)
+ ret = madvise(f->mmap, f->file_size, MADV_DONTNEED);
+ else if (td->filetype == FIO_TYPE_FILE) {
+ if (!td->odirect)
+ ret = fadvise(f->fd, f->file_offset, f->file_size, POSIX_FADV_DONTNEED);
+ } else if (td->filetype == FIO_TYPE_BD) {
+ if (!td->odirect)
+ ret = blockdev_invalidate_cache(f->fd);
+ } else if (td->filetype == FIO_TYPE_CHAR)
+ ret = 0;
+
+ if (ret < 0) {
+ td_verror(td, errno, "invalidate_cache");
+ return 1;
+ }
+
+ return ret;
+}
+