netdev - Re: [PATCH] f_phonet: use page-sized rather than MTU-sized RX buffers

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Message-Id: <20090812.221545.14502703.davem@davemloft.net>
Date:	Wed, 12 Aug 2009 22:15:45 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	remi.denis-courmont@...ia.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] f_phonet: use page-sized rather than MTU-sized RX
 buffers

From: Rémi Denis-Courmont <remi.denis-courmont@...ia.com>
Date: Fri,  7 Aug 2009 10:56:44 +0300

> From: Rémi Denis-Courmont <remi.denis-courmont@...ia.com>
> 
> Instead of a large (physically) linear buffer, we generate a set of
> paged sk_buff, so no extra memory copy is involved. This removes
> high-order allocations and saves quite a bit of memory. Phonet MTU is
> 65541 bytes, so the two buffers were padded to 128 kilo-bytes each.
> Now, we create 17 page buffers, almost a 75% memory use reduction.
> 
> Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@...ia.com>

Applied.
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