Re: [Qemu-devel] Re: [PATCH 4/9] virtio-serial: Handle scatter-gather buffers for control messages

[Amit Shah]

On (Sat) Mar 20 2010 [09:40:50], Avi Kivity wrote:
> On 03/19/2010 01:58 PM, Amit Shah wrote:
>> +
>> +        offset = 0;
>> +        for (i = 0; i<  elem.out_num; i++) {
>> +            memcpy(buf + offset, elem.out_sg[i].iov_base,
>> +                   elem.out_sg[i].iov_len);
>> +            offset += elem.out_sg[i].iov_len;
>> +        }
>> +        len = cur_len;
>> +
>> +        handle_control_message(vser, buf, len);
>> +        virtqueue_push(vq,&elem, len);
>> +    }
>> +    if (len) {
>> +        qemu_free(buf);
>>       }
>>       virtio_notify(vdev, vq);
>>   }
>
> Isn't there some virtio function to linearize requests?

I don't see one.

                Amit