netdev - Re: [PATCH 14/18] virtio: add api for delayed callbacks

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Message-ID: <871v08h0vm.fsf@rustcorp.com.au>
Date:	Mon, 09 May 2011 15:27:33 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:	Carsten Otte <cotte@...ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Shirley Ma <xma@...ibm.com>, lguest@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org, kvm@...r.kernel.org,
	Krishna Kumar <krkumar2@...ibm.com>,
	Tom Lendacky <tahm@...ux.vnet.ibm.com>, steved@...ibm.com,
	habanero@...ux.vnet.ibm.com
Subject: Re: [PATCH 14/18] virtio: add api for delayed callbacks

On Wed, 4 May 2011 23:52:33 +0300, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> Add an API that tells the other side that callbacks
> should be delayed until a lot of work has been done.
> Implement using the new used_event feature.

Since you're going to add a capacity query anyway, why not add the
threshold argument here?

Then the caller can choose how much space it needs.  Maybe net and block
will want different things...

Cheers,
Rusty.
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