diff options
| -rw-r--r-- | util/oslib-posix.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/util/oslib-posix.c b/util/oslib-posix.c index 956f66ab4a..94d81b9ec0 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -361,7 +361,19 @@ static void *do_touch_pages(void *arg) memset_thread_failed = true; } else { for (i = 0; i < numpages; i++) { - memset(addr, 0, 1); + /* + * Read & write back the same value, so we don't + * corrupt existing user/app data that might be + * stored. + * + * 'volatile' to stop compiler optimizing this away + * to a no-op + * + * TODO: get a better solution from kernel so we + * don't need to write at all so we don't cause + * wear on the storage backing the region... + */ + *(volatile char *)addr = *addr; addr += hpagesize; } } |