Catch the case where size= is less than the minimum block size
Fio will currently just attempt to start and immediately exit,
with no clue as to what went wrong. The behaviour is correct
in the sense that there's nothing to output, but it can be a
little confusing.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/init.c b/init.c
index b330925..aba7671 100644
--- a/init.c
+++ b/init.c
@@ -621,6 +621,14 @@
if (td->o.random_distribution != FIO_RAND_DIST_RANDOM)
td->o.norandommap = 1;
+ /*
+ * If size is set but less than the min block size, complain
+ */
+ if (o->size && o->size < td_min_bs(td)) {
+ log_err("fio: size too small, must be larger than the IO size: %llu\n", (unsigned long long) o->size);
+ ret = 1;
+ }
+
return ret;
}