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Message-Id: <20120430.214831.1079448543357914010.davem@davemloft.net> Date: Mon, 30 Apr 2012 21:48:31 -0400 (EDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: netdev@...r.kernel.org, ncardwell@...gle.com, therbert@...gle.com, jeffrey.t.kirsher@...el.com, mchan@...adcom.com, mcarlson@...adcom.com, herbert@...dor.hengli.com.au, bhutchings@...arflare.com, ilpo.jarvinen@...sinki.fi, maze@...gle.com Subject: Re: [PATCH 3/4 v2 net-next] net: make GRO aware of skb->head_frag From: Eric Dumazet <eric.dumazet@...il.com> Date: Mon, 30 Apr 2012 20:10:34 +0200 > From: Eric Dumazet <edumazet@...gle.com> > > GRO can check if skb to be merged has its skb->head mapped to a page > fragment, instead of a kmalloc() area. > > We 'upgrade' skb->head as a fragment in itself > > This avoids the frag_list fallback, and permits to build true GRO skb > (one sk_buff and up to 16 fragments), using less memory. > > This reduces number of cache misses when user makes its copy, since a > single sk_buff is fetched. > > This is a followup of patch "net: allow skb->head to be a page fragment" > > Signed-off-by: Eric Dumazet <edumazet@...gle.com> Applied. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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