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| author | Thomas Huth <thuth@redhat.com> | 2016-06-28 00:12:03 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-09-09 20:58:34 +0300 |
| commit | a8bba0ada41b228e4dd5113a02f20bbc0f5d6f0a (patch) | |
| tree | bf109deb32d9ada555a0c75e4d7ae648744274f5 /hw/virtio/virtio-bus.c | |
| parent | c2a57aae9a1c3dd7de77daf5478df10379aeeebf (diff) | |
| download | focaccia-qemu-a8bba0ada41b228e4dd5113a02f20bbc0f5d6f0a.tar.gz focaccia-qemu-a8bba0ada41b228e4dd5113a02f20bbc0f5d6f0a.zip | |
virtio: Tell the user what went wrong when event_notifier_init failed
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>
Diffstat (limited to 'hw/virtio/virtio-bus.c')
| -rw-r--r-- | hw/virtio/virtio-bus.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/hw/virtio/virtio-bus.c b/hw/virtio/virtio-bus.c index a85b7c8abe..14927935ae 100644 --- a/hw/virtio/virtio-bus.c +++ b/hw/virtio/virtio-bus.c @@ -164,7 +164,8 @@ static int set_host_notifier_internal(DeviceState *proxy, VirtioBusState *bus, 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); |