Subject: Re: [PATCH 2/3] virtio: indirect ring entries (VIRTIO_RING_F_INDIRECT_DESC)

From: Avi Kivity <[email-masked]>
Date: Sun, 17 May 2009 18:05:39 +0300

Rusty Russell wrote:
> On Sun, 17 May 2009 03:57:01 pm Avi Kivity wrote:
>   
>> Rusty Russell wrote:
>>     
>>> +static void adjust_threshold(struct vring_virtqueue *vq,
>>> +			     unsigned int out, unsigned int in)
>>> +{
>>> +	/* There are really two species of virtqueue, and it matters here.
>>> +	 * If there are no output parts, it's a "normally full" receive queue,
>>> +	 * otherwise it's a "normally empty" send queue. */
>>>       
>> This comment is true for networking, but not for block. ++overkill with
>> a ->adjust_threshold op.
>>     
>
> No, it's true for block.  It has output parts, so we should reduce threshold 
> when it's full.  Network recvq is an example which should reduce threshold 
> when it's empty.
>   

You mean the header that contains the sector number?  It's a little 
incidental, but I guess it works.

-- 
error compiling committee.c: too many arguments to function