On 2015/6/4 9:13, Rusty Russell wrote: > Linhaifeng <haifeng....@huawei.com> writes: >> Hi, >> >> I'm a newbie and have a question about vring_new_virtqueue function. >> >> Why we set avail->flags to VRING_AVAIL_F_NO_INTERRUPT when no callbacks? >> I think we should set avail->flags to VRING_AVAIL_F_NO_INTERRUPT even if no >> callbacks. > > Hi Linhaifeng, > > Not sure I understand your question, but I'll try to answer. > > We don't set VRING_AVAIL_F_NO_INTERRUPT if there's a callback because we > want that callback called. Otherwise callback will never be used. > > Cheers, > Rusty. > >
Hi Rusty, Thank you for your response. I mean should we set VRING_AVAIL_F_NO_INTERRUPT when virtqueue is initialized whether there is callback or not? As it would be set in function virtqueue_disable_cb and virtqueue_enable_cb_prepare later. Regards, Haifeng -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
