Re: [PATCH] virtio: console: fix lost wakeup when device is written and polled

On Mon, Dec 15, 2025, at 11:40, Lorenz Bauer wrote:

• }
• if (freed) {

• /* We freed all used buffers. Issue a wake up so that other pending
  

•  * tasks do not get stuck. This is necessary because vring_interrupt()
  

•  * will drop wakeups from the host if there are no used buffers.
  

•  */
  

  port->outvq_full = false;

• wake_up_interruptible(&port->waitqueue);
  

  }

Is it always enough to wake up only one waiter? From your description it sounds like it might need wake_up_interruptible_all() instead, but I may be misunderstanding the issue.

Arnd