netdev - Re: [PATCH] Packet socket: mmapped IO: PACKET_TX

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Message-ID: <49117D3D.7070702@trash.net>
Date:	Wed, 05 Nov 2008 12:02:21 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Johann Baudy <johaahn@...il.com>
CC:	"Lovich, Vitali" <vlovich@...lcomm.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Evgeniy Polyakov <zbr@...emap.net>
Subject: Re: [PATCH] Packet socket: mmapped IO: PACKET_TX_RING

Johann Baudy wrote:
> I would like to integrate this barrier mechanism in __packet_[set|
> get]_status() function. Thoughts?

The reason why its not in there is to avoid the unnecessary
barrier when setting up the ring in packet_set_ring().

The code is fishy though, I agree. Have a look at this discussion:

http://marc.info/?l=linux-netdev&m=119383985207984&w=2
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