From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from nommos.sslcatacombnetworking.com (nommos.sslcatacombnetworking.com [67.18.224.114]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 12AA2679E7 for ; Wed, 2 Aug 2006 23:32:17 +1000 (EST) In-Reply-To: <1154507145.24203.0.camel@localhost.localdomain> References: <1154507145.24203.0.camel@localhost.localdomain> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <027C3DD1-67E1-4CF2-B8B6-36CD1F09D1D2@kernel.crashing.org> From: Kumar Gala Subject: Re: SMP in 32-bit arch/powerpc Date: Wed, 2 Aug 2006 08:32:14 -0500 To: Adrian Cox Cc: "linuxppc-dev@ozlabs.org" List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Aug 2, 2006, at 3:25 AM, Adrian Cox wrote: > Is anybody else having problems with 32-bit SMP support in arch/ > powerpc? > I'm using 2.6.17 as my current base, because I've not yet merged the > latest mpic changes. > > I'm currently bringing up a dual-7448 board, and when I build the > kernel > with CONFIG_SMP, the bootmem allocator corrupts the device tree. The > strange thing is, this still happens when I don't start the second > CPU. > Kernels built without CONFIG_SMP run flawlessly on the same hardware. There are a few patches to prom.c that may help. I know I've run into this on other 32-bit systems booting from u-boot. These patches resolved my issue. * [PATCH] powerpc: Auto reserve of device tree blob * [POWERPC] Prevent duplicate lmb reservations for Device... - kumar