netdev - Re: [PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer size for improved performance

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Message-ID: <CANJ5vPLvDff5PMYNGvtt-dd=md8b46ZXAYLv-KnerNcfzDNHpw@mail.gmail.com>
Date:	Wed, 8 Jan 2014 19:41:58 -0800
From:	Michael Dalton <mwdalton@...gle.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Eric Dumazet <edumazet@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jason Wang <jasowang@...hat.com>,
	lf-virt <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH net-next v2 3/4] virtio-net: auto-tune mergeable rx buffer
 size for improved performance

Sorry, forgot to mention - if we want to explore combining the buffer
address and truesize into a single void *, we could also exploit the
fact that our size ranges from aligned GOOD_PACKET_LEN to PAGE_SIZE, and
potentially encode fewer values for truesize (and require a smaller
alignment than 256). The prior e-mails discussion of 256 byte alignment
with 256 values is just one potential design point.

Best,

Mike
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