From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Mackerras Subject: Re: iptables very slow after commit 784544739a25c30637397ace5489eeb6e15d7d49 Date: Sun, 12 Apr 2009 21:34:27 +1000 Message-ID: <18913.53699.544083.320542@cargo.ozlabs.ibm.com> References: <20090410095246.4fdccb56@s6510> <20090410.182507.140306636.davem@davemloft.net> <20090411041533.GB6822@linux.vnet.ibm.com> <20090411070854.GC11799@elte.hu> <20090411174801.GG6822@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: Ingo Molnar , Linus Torvalds , David Miller , Lai Jiangshan , shemminger@vyatta.com, jeff.chua.linux@gmail.com, dada1@cosmosbay.com, jengelh@medozas.de, kaber@trash.net, r000n@r000n.net, Linux Kernel Mailing List , netfilter-devel@vger.kernel.org, netdev@vger.kernel.org, benh@kernel.crashing.org To: paulmck@linux.vnet.ibm.com Return-path: In-Reply-To: <20090411174801.GG6822@linux.vnet.ibm.com> Sender: netfilter-devel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Paul E. McKenney writes: > If the generic implementation is needed only on !SMP systems, that > could work. The architectures I would be worried about include > powerpc and ia64, which I believe support 32-bit SMP builds. 32-bit powerpc doesn't have 64-bit atomic operations and does support SMP. What about ARM? I thought they had 32-bit SMP these days as well. Paul.