v1: https://lists.nongnu.org/archive/html/qemu-block/2024-01/msg00336.html
Hi, This is basically the same series as v1: When using aio_set_event_notifier_poll(), the io_poll_end() callback is only invoked when polling ends, not when the notifier is being removed while in a polling section. This can leave the virtqueue notifier disabled during drained sections, which however is not a bad thing. We just need to ensure they are re-enabled after the drain, and kick the virtqueue once to pick up all the requests that came in during the drained section. Patch 1 is a technically unrelated fix, but addresses a problem that became visible with patch 2 applied. Patch 3 is a small (optional) clean-up patch. v2: - Changed the title of this series and patch 2 (was: "Keep notifications disabled durin drain"): Keeping the notifier disabled was something the initial RFC did, this version (v1 too) just ensures the notifier is enabled after the drain, regardless of its state before. - Use event_notifier_set() instead of virtio_queue_notify() in patch 2 - Added patch 3 Hanna Czenczek (3): virtio-scsi: Attach event vq notifier with no_poll virtio: Re-enable notifications after drain virtio-blk: Use ioeventfd_attach in start_ioeventfd include/block/aio.h | 7 ++++++- hw/block/virtio-blk.c | 21 ++++++++++----------- hw/scsi/virtio-scsi.c | 7 ++++++- hw/virtio/virtio.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 64 insertions(+), 13 deletions(-) -- 2.43.0