On Thu, Feb 09, 2017 at 04:40:47PM +0800, Fam Zheng wrote:
> In virtio_queue_host_notifier_aio_poll, not all "!virtio_queue_empty()"
> cases are making true progress.
>
> Currently the offending one is virtio-scsi event queue, whose handler
> does nothing if no event is pending. As a result aio_po
On 09/02/2017 09:40, Fam Zheng wrote:
> In virtio_queue_host_notifier_aio_poll, not all "!virtio_queue_empty()"
> cases are making true progress.
>
> Currently the offending one is virtio-scsi event queue, whose handler
> does nothing if no event is pending. As a result aio_poll() will spin on
>
On Thu, Feb 9, 2017 at 12:40 AM, Fam Zheng wrote:
> In virtio_queue_host_notifier_aio_poll, not all "!virtio_queue_empty()"
> cases are making true progress.
>
> Currently the offending one is virtio-scsi event queue, whose handler
> does nothing if no event is pending. As a result aio_poll() will
In virtio_queue_host_notifier_aio_poll, not all "!virtio_queue_empty()"
cases are making true progress.
Currently the offending one is virtio-scsi event queue, whose handler
does nothing if no event is pending. As a result aio_poll() will spin on
the "non-empty" VQ and take 100% host CPU.
Fix thi
