From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266737AbUH0XrH (ORCPT ); Fri, 27 Aug 2004 19:47:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267350AbUH0Xq5 (ORCPT ); Fri, 27 Aug 2004 19:46:57 -0400 Received: from adsl-63-197-226-105.dsl.snfc21.pacbell.net ([63.197.226.105]:56705 "EHLO cheetah.davemloft.net") by vger.kernel.org with ESMTP id S266737AbUH0Xqq (ORCPT ); Fri, 27 Aug 2004 19:46:46 -0400 Date: Fri, 27 Aug 2004 16:43:06 -0700 From: "David S. Miller" To: Andi Kleen Cc: clameter@sgi.com, akpm@osdl.org, wli@holomorphy.com, davem@redhat.com, raybry@sgi.com, ak@muc.de, benh@kernel.crashing.org, manfred@colorfullife.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, vrajesh@umich.edu, hugh@veritas.com Subject: Re: page fault scalability patch final : i386 tested, x86_64 support added Message-Id: <20040827164306.2b764700.davem@davemloft.net> In-Reply-To: <20040827233602.GB1024@wotan.suse.de> References: <20040815165827.0c0c8844.davem@redhat.com> <20040815185644.24ecb247.davem@redhat.com> <20040816143903.GY11200@holomorphy.com> <20040827233602.GB1024@wotan.suse.de> X-Mailer: Sylpheed version 0.9.12 (GTK+ 1.2.10; sparc-unknown-linux-gnu) X-Face: "_;p5u5aPsO,_Vsx"^v-pEq09'CU4&Dc1$fQExov$62l60cgCc%FnIwD=.UF^a>?5'9Kn[;433QFVV9M..2eN.@4ZWPGbdi<=?[:T>y?SD(R*-3It"Vj:)"dP Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 28 Aug 2004 01:36:02 +0200 Andi Kleen wrote: > On some architectures it used to be 24bit only even, but I think that > has been fixed. It has, on sparc32 the hashed spinlock scheme is being used so it's a full 32-bit counter now. Well, it's not even 32-bits, it's actually 31-bits since the value is declared as signed. Only 64-bit platforms provide the atomic64_t implementation. We'd need to deal with that before making your suggested change.