Re: [PATCH v2 2/2] dax: add regression test for stale mmap reads

On Tue, Apr 25, 2017 at 02:51:06PM -0600, Ross Zwisler wrote:

> + /* > + * Try and use the mmap to read back the data we just wrote with > + * pwrite(). If the kernel bug is present the mapping from the 2MiB > + * zero page will still be intact, and we'll read back zeros instead. > + */ > + if (strncmp(buffer, data, strlen(buffer))) { > + fprintf(stderr, "strncmp mismatch: '%s' vs '%s'\n", buffer, > + data); munmap close(fd); > + exit(1); > + } > + munmap