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mmap engine: fix open-for-size check
[fio.git]
/
engines
/
mmap.c
diff --git
a/engines/mmap.c
b/engines/mmap.c
index 95ad1d842250049162564a078864070cc28c8f2e..f3d55c167691616a9d6478dba51e51154475ff3f 100644
(file)
--- a/
engines/mmap.c
+++ b/
engines/mmap.c
@@
-60,6
+60,12
@@
static int fio_mmapio_open(struct thread_data *td, struct fio_file *f)
if (ret)
return ret;
+ /*
+ * for size checkup, don't mmap anything.
+ */
+ if (!f->io_size)
+ return 0;
+
if (td_rw(td))
flags = PROT_READ | PROT_WRITE;
else if (td_write(td)) {