netdev - Re: [PATCH v2 1/4] Defer skb allocation -- add destroy buffers function for virtio

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Message-Id: <1260832942.4387.9.camel@localhost.localdomain>
Date:	Mon, 14 Dec 2009 15:22:22 -0800
From:	Shirley Ma <mashirle@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, Avi Kivity <avi@...hat.com>,
	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Anthony Liguori <anthony@...emonkey.ws>
Subject: Re: [PATCH v2 1/4] Defer skb allocation -- add destroy buffers
 function for virtio

Hello Michael,

On Mon, 2009-12-14 at 22:22 +0200, Michael S. Tsirkin wrote:
> I dont insist, but my idea was
> 
> for (;;) {
>         b = vq->destroy(vq);
>         if (!b)
>                 break;
>         --vi->num;
>         put_page(b);
> }
> 
> so we do not have to lose track of the counter.

That's not a bad idea, but to do this, then this fuction will be
specific for virtio_net device (vi is virtnet_info) only in a generic
virtqueue API.

Thanks
Shirley

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