For pci_vfio, while removing the device by rte_dev_remove(), pci_vfio_disable_notifier() will call rte_intr_callback_unregister(), which may return -EAGAIN, if an interrupt source (kernel) has some active callbacks right now. As a result, the callback (req notifier) can be never unregistered, and the corresponding descriptor (vfio_req_intr_handle.fd) can be never closed. The kernel will continuously try to notify the user space using req notifier, but as the device is already removed, in this case it even cannot find a bus for that device, the log is full of messages "EAL: Cannot find bus for device (XX:XX.X)"
Renata Saiakhova (1): librte_eal: wrapper around rte_intr_callback_unregister(). lib/librte_eal/freebsd/eal_interrupts.c | 16 ++++++++++++++-- lib/librte_eal/linux/eal_interrupts.c | 16 ++++++++++++++-- 2 files changed, 28 insertions(+), 4 deletions(-) -- 2.17.2
