[PATCH] Let the syslet ioengine register check supportability
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/engines/syslet-rw.c b/engines/syslet-rw.c
index 7099a6a..380d19d 100644
--- a/engines/syslet-rw.c
+++ b/engines/syslet-rw.c
@@ -185,7 +185,7 @@
return io_u->error;
}
-static void async_head_init(struct syslet_data *sd, unsigned int depth)
+static int async_head_init(struct syslet_data *sd, unsigned int depth)
{
struct async_head_user ahu;
unsigned long ring_size;
@@ -199,8 +199,14 @@
ahu.ring_size_bytes = ring_size;
ahu.max_nr_threads = -1;
- if (async_register(&ahu, sizeof(ahu)) < 0)
+ if (async_register(&ahu, sizeof(ahu)) < 0) {
perror("async_register");
+ fprintf(stderr, "fio: syslet likely not supported\n");
+ free(sd->ring);
+ return 1;
+ }
+
+ return 0;
}
static void async_head_exit(struct syslet_data *sd, unsigned int depth)
@@ -231,12 +237,22 @@
{
struct syslet_data *sd;
+
sd = malloc(sizeof(*sd));
memset(sd, 0, sizeof(*sd));
sd->events = malloc(sizeof(struct io_u *) * td->iodepth);
memset(sd->events, 0, sizeof(struct io_u *) * td->iodepth);
+
+ /*
+ * This will handily fail for kernels where syslet isn't available
+ */
+ if (async_head_init(sd, td->iodepth)) {
+ free(sd->events);
+ free(sd);
+ return 1;
+ }
+
td->io_ops->data = sd;
- async_head_init(sd, td->iodepth);
return 0;
}