event_notifier_init() can fail in real life, for example when there
are not enough open file handles available (EMFILE) when using a lot
of devices. So instead of leaving the average user with a cryptic
error number only, print out a proper error message with strerror()
instead, so that the user has a better way to figure out what is
going on and that using "ulimit -n" might help here for example.
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
if (assign) {
r = event_notifier_init(notifier, 1);
if (r < 0) {
- error_report("%s: unable to init event notifier: %d", __func__, r);
+ error_report("%s: unable to init event notifier: %s (%d)",
+ __func__, strerror(-r), r);
return r;
}
virtio_queue_set_host_notifier_fd_handler(vq, true, set_handler);