From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail4.comsite.net (mail4.comsite.net [205.238.176.238]) by ozlabs.org (Postfix) with ESMTP id AF1BEB6FB5 for ; Tue, 24 May 2011 03:39:16 +1000 (EST) From: Milton Miller To: Dave Carroll Subject: RE: [ v4] powerpc: Force page alignment for initrd reserved memory Message-ID: In-Reply-To: <522F24EF533FC546962ECFA2054FF777373072AB78@MAILSERVER2.cos.astekcorp.com> References: <522F24EF533FC546962ECFA2054FF777373072AB75@MAILSERVER2.cos.astekcorp.com> <522F24EF533FC546962ECFA2054FF777373072AB78@MAILSERVER2.cos.astekcorp.com> Date: Mon, 23 May 2011 12:39:06 -0500 Cc: Paul Mackerras , LPPC , LKML List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 23 May 2011 about 10:50:07 -0600, Dave Carroll wrote: > I'm withdrawing this patch for the moment, due to two areas that need > further research; > > 1) An adjacent FDT blob, as mentioned by Milton Miller, and > Ok ... by the way, see move_device_tree() in arch/powerpc/kernel/prom.c > 2) Potential interaction with the crash kernel, as used in > init/initramfs.c which already goes around the start and end of crashk_res, which is adjusted to PAGE_ALIGN in reserve_crashkernel() in machine_kexec.c > If anyone sees other interactions, please feel free to let me know ... > > Thanks, > -Dave Carroll One interaction that I have ignored is preserve_initrd overlapping crash kernel. Loading the crash kernel destroys the preserved initrd. But that is beyond the scope of your current patch (and probably a seperate patch, with cross-architecture scope). milton