Re: [PATCH v2 3/4] virtio: use defer_call() in virtio_irqfd_notify()

On 8/17/23 17:58, Stefan Hajnoczi wrote: > virtio-blk and virtio-scsi invoke virtio_irqfd_notify() to send Used > Buffer Notifications from an IOThread. This involves an eventfd > write(2) syscall. Calling this repeatedly when completing multiple I/O > requests in a row is wasteful. > > Use the

Re: [PATCH v2 3/4] virtio: use defer_call() in virtio_irqfd_notify()

On Thu, Aug 17, 2023 at 11:58:46AM -0400, Stefan Hajnoczi wrote: > virtio-blk and virtio-scsi invoke virtio_irqfd_notify() to send Used > Buffer Notifications from an IOThread. This involves an eventfd > write(2) syscall. Calling this repeatedly when completing multiple I/O > requests in a row is

[PATCH v2 3/4] virtio: use defer_call() in virtio_irqfd_notify()

virtio-blk and virtio-scsi invoke virtio_irqfd_notify() to send Used Buffer Notifications from an IOThread. This involves an eventfd write(2) syscall. Calling this repeatedly when completing multiple I/O requests in a row is wasteful. Use the defer_call() API to batch together