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Subject: Re: is CONFIG_PACKET_MMAP always a win?
To: dank@kegel.com
Date: Fri, 22 Feb 2002 02:33:02 +0000 (GMT)
Cc: linux-kernel@vger.kernel.org (linux-kernel@vger.kernel.org),
        zab@zabbo.net (Zach Brown)
In-Reply-To: <3C75A418.2C848B3F@kegel.com> from "Dan Kegel" at Feb 21, 2002 05:51:20 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> c) enable CONFIG_PACKET_MMAP, use PACKET_RX_RING, and read packets from an mmap'd ring buffer
>    Overhead: kernel does a full memcpy of the packet body to get it
>    into the ring buffer, and my program does another to get it out.

Why are you copying it out of the ring not processing it in place ?
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