linux-kernel - Re: [PATCH net-next] virtio-net: drop rq->max and rq->num

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Message-Id: <20140116.173737.429918297549548812.davem@davemloft.net>
Date:	Thu, 16 Jan 2014 17:37:37 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jasowang@...hat.com
Cc:	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au, mst@...hat.com
Subject: Re: [PATCH net-next] virtio-net: drop rq->max and rq->num

From: Jason Wang <jasowang@...hat.com>
Date: Thu, 16 Jan 2014 14:45:24 +0800

> It looks like there's no need for those two fields:
> 
> - Unless there's a failure for the first refill try, rq->max should be always
>   equal to the vring size.
> - rq->num is only used to determine the condition that we need to do the refill,
>   we could check vq->num_free instead.
> - rq->num was required to be increased or decreased explicitly after each
>   get/put which results a bad API.
> 
> So this patch removes them both to make the code simpler.
> 
> Cc: Rusty Russell <rusty@...tcorp.com.au>
> Cc: Michael S. Tsirkin <mst@...hat.com>
> Signed-off-by: Jason Wang <jasowang@...hat.com>
> Acked-by: Rusty Russell <rusty@...tcorp.com.au>

Applied, thanks.
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