Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750795AbWA2AtS (ORCPT ); Sat, 28 Jan 2006 19:49:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750778AbWA2AtS (ORCPT ); Sat, 28 Jan 2006 19:49:18 -0500 Received: from kanga.kvack.org ([66.96.29.28]:14564 "EHLO kanga.kvack.org") by vger.kernel.org with ESMTP id S1750761AbWA2AtS (ORCPT ); Sat, 28 Jan 2006 19:49:18 -0500 Date: Sat, 28 Jan 2006 19:44:59 -0500 From: Benjamin LaHaise To: Eric Dumazet Cc: Andrew Morton , kiran@scalex86.org, davem@davemloft.net, linux-kernel@vger.kernel.org, shai@scalex86.org, netdev@vger.kernel.org, pravins@calsoftinc.com Subject: Re: [patch 3/4] net: Percpufy frequently used variables -- proto.sockets_allocated Message-ID: <20060129004459.GA24099@kvack.org> References: <20060126185649.GB3651@localhost.localdomain> <20060126190357.GE3651@localhost.localdomain> <43D9DFA1.9070802@cosmosbay.com> <20060127195227.GA3565@localhost.localdomain> <20060127121602.18bc3f25.akpm@osdl.org> <20060127224433.GB3565@localhost.localdomain> <43DAA586.5050609@cosmosbay.com> <20060127151635.3a149fe2.akpm@osdl.org> <43DABAA4.8040208@cosmosbay.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43DABAA4.8040208@cosmosbay.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 569 Lines: 14 On Sat, Jan 28, 2006 at 01:28:20AM +0100, Eric Dumazet wrote: > We might use atomic_long_t only (and no spinlocks) > Something like this ? Erk, complex and slow... Try using local_t instead, which is substantially cheaper on the P4 as it doesn't use the lock prefix and act as a memory barrier. See asm/local.h. -ben - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/