netdev - Re: [net-next PATCH v1 1/3] net: sched: af_packet support for direct ring access

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Message-Id: <20141007.130127.2186178418361529001.davem@davemloft.net>
Date:	Tue, 07 Oct 2014 13:01:27 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	alexei.starovoitov@...il.com
Cc:	danny.zhou@...el.com, willemb@...gle.com, john.fastabend@...il.com,
	dborkman@...hat.com, fw@...len.de, gerlitz.or@...il.com,
	hannes@...essinduktion.org, netdev@...r.kernel.org,
	john.ronciak@...el.com, amirv@...lanox.com, eric.dumazet@...il.com
Subject: Re: [net-next PATCH v1 1/3] net: sched: af_packet support for
 direct ring access

From: Alexei Starovoitov <alexei.starovoitov@...il.com>
Date: Tue, 7 Oct 2014 09:33:04 -0700

> I guess that's great for DPDK users, but I don't think it's good for
> linux.

Any use of a piece of hardware is fine with me, personally, as long
as adequate protections are in place.

If it's just a descriptor ring in software and a doorbell to trigger
a refetch of the head and tail pointers, with appropriate protection
and control of the memory attached to the ring, I don't see how I
could object to such a facility.
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