On Mon, Mar 23, 2026 at 08:54:49AM -0500, Jaehoon Kim wrote:
> Nodes are no longer added to poll_aio_handlers when adaptive polling is
> disabled, preventing unnecessary try_poll_mode() calls. Additionally,
> aio_poll() skips try_poll_mode() when timeout is 0.

Skipping when timeout is 0 seems risky to me. VIRTIO devices disable
guest kicks when polling mode is started. When aio_poll(ctx,
blocking=false) is called, we will skip polling and
ctx->fdmon_ops->need_wait(ctx) won't detect an event either. aio_poll()
will return without noticing that the VIRTIO device's AioHandler is
ready.

Is skipping when timeout 0 necessary for performance or can it be
dropped from the patch?

Aside from this:

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>