[PATCH] First cut syslet async io support

Doesn't seem to perform as well as expected, needs investigation.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/log.c b/log.c
index a705e50..dd63c38 100644
--- a/log.c
+++ b/log.c
@@ -5,7 +5,7 @@
 
 void write_iolog_put(struct thread_data *td, struct io_u *io_u)
 {
-	fprintf(td->iolog_f, "%u,%llu,%u\n", io_u->ddir, io_u->offset, io_u->buflen);
+	fprintf(td->iolog_f, "%u,%llu,%lu\n", io_u->ddir, io_u->offset, io_u->buflen);
 }
 
 int read_iolog_get(struct thread_data *td, struct io_u *io_u)