From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next-2.6] sfc: Reduce size of efx_rx_buffer by unionising skb and page Date: Tue, 01 Mar 2011 13:08:58 -0800 (PST) Message-ID: <20110301.130858.260088073.davem@davemloft.net> References: <1298942490.3069.180.camel@localhost> <20110301.122459.183051942.davem@davemloft.net> <1299012424.2529.39.camel@bwh-desktop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: linux-net-drivers@solarflare.com, netdev@vger.kernel.org To: bhutchings@solarflare.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:50348 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757226Ab1CAVIW (ORCPT ); Tue, 1 Mar 2011 16:08:22 -0500 In-Reply-To: <1299012424.2529.39.camel@bwh-desktop> Sender: netdev-owner@vger.kernel.org List-ID: From: Ben Hutchings Date: Tue, 01 Mar 2011 20:47:04 +0000 > Combining the flag with the pointers wouldn't improve on this: Good point, but: 1) One less load in your RX fast path. 2) 32-bits of space for any addition state you might like to add later