netdev - Re: [PATCH net-next] bnx2: switch to build

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Message-Id: <20111117.160421.2203345120962009703.davem@davemloft.net>
Date:	Thu, 17 Nov 2011 16:04:21 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, mchan@...adcom.com, eilong@...adcom.com
Subject: Re: [PATCH net-next] bnx2: switch to build_skb() infrastructure

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 15 Nov 2011 18:30:05 +0100

> This is very similar to bnx2x conversion, but bnx2 only requires 16bytes
> alignement at start of the received frame to store its l2_fhdr, so goal
> was not to reduce skb truesize (in fact it should not change after this
> patch)
> 
> Using build_skb() reduces cache line misses in the driver, since we
> use cache hot skb instead of cold ones. Number of in-flight sk_buff
> structures is lower, they are more likely recycled in SLUB caches
> while still hot.
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
> CC: Michael Chan <mchan@...adcom.com>
> CC: Eilon Greenstein <eilong@...adcom.com>

Broadcom folks, please review.
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