netdev - Re: Network performance with small packets

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Message-ID: <1296595725.26937.819.camel@localhost.localdomain>
Date:	Tue, 01 Feb 2011 13:28:45 -0800
From:	Shirley Ma <mashirle@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	David Miller <davem@...emloft.net>, steved@...ibm.com,
	netdev@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: Network performance with small packets

On Tue, 2011-02-01 at 23:21 +0200, Michael S. Tsirkin wrote:
> Confused. We compare capacity to skb frags, no?
> That's sg I think ...

Current guest kernel use indirect buffers, num_free returns how many
available descriptors not skb frags. So it's wrong here.

Shirley

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