From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from omx1.americas.sgi.com (omx1-ext.sgi.com [192.48.179.11]) by ozlabs.org (Postfix) with ESMTP id 8E03167A5D for ; Tue, 18 Apr 2006 02:56:25 +1000 (EST) Date: Mon, 17 Apr 2006 09:55:02 -0700 (PDT) From: Christoph Lameter To: kiran@scalex86.org Subject: Re: [PATCH 00/05] robust per_cpu allocation for modules In-Reply-To: <4440855A.7040203@yahoo.com.au> Message-ID: References: <1145049535.1336.128.camel@localhost.localdomain> <4440855A.7040203@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: Christoph Lameter Cc: Andrew Morton , linux-mips@linux-mips.org, David Mosberger-Tang , linux-ia64@vger.kernel.org, Martin Mares , spyro@f2s.com, Joe Taylor , Andi Kleen , linuxppc-dev@ozlabs.org, paulus@samba.org, benedict.gaster@superh.com, bjornw@axis.com, Ingo Molnar , Nick Piggin , grundler@parisc-linux.org, Steven Rostedt , starvik@axis.com, Linus Torvalds , Thomas Gleixner , rth@twiddle.net, Chris Zankel , tony.luck@intel.com, LKML , ralf@linux-mips.org, Marc Gauthier , lethal@linux-sh.org, schwidefsky@de.ibm.com, linux390@de.ibm.com, davem@davemloft.net, parisc-linux@parisc-linux.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sat, 15 Apr 2006, Nick Piggin wrote: > If I'm following you correctly, this adds another dependent load > to a per-CPU data access, and from memory that isn't node-affine. I am also concerned about that. Kiran has a patch to avoid allocpercpu having to go through one level of indirection that I guess would no longer work with this scheme. > If so, I think people with SMP and NUMA kernels would care more > about performance and scalability than the few k of memory this > saves. Right.