From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id EC789CDB465 for ; Wed, 11 Oct 2023 23:48:55 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=llZ4fOjk; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4S5Txf3VBBz3cDV for ; Thu, 12 Oct 2023 10:48:54 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=llZ4fOjk; dkim-atps=neutral Received: from gandalf.ozlabs.org (mail.ozlabs.org [IPv6:2404:9400:2221:ea00::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4S5Twd47Zjz2yhZ for ; Thu, 12 Oct 2023 10:48:01 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ellerman.id.au; s=201909; t=1697068081; bh=v6nwpHe4J/UW7amVCn9IXv2fo3diti+324I5sej05bs=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=llZ4fOjk+Ah8EX3I+mPNK/G8vzII/W9vLjvmN95boRJgsA8RXjBNicfFEjRsWp6d0 qTZEyvsA9XVrPRSpoLH2Vc+Oj3a9qwYOjODCvdN+LDC4GTeX29/QXl97QRM7qaull7 XzKovJNrTKvqrf5GMVjJH8qC+/MReuJ5tcMmPzGG2wnXjStc+kK+b7YYkuCyDr50wF Me3JBoper4KaL5P2hcWXYPIIm/jYXJ5G491RFOL1zsctxH7bNGRAr4WV0QOYYOCmTB ZOt6hNCJ6HqbtpljdmynOYPYz7B34ut4is4Zr6/+i6hCsdFtNvWPEb2fJthVb04IED OiW9m2PJyEG3w== Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4S5Twd1Fb3z4xWF; Thu, 12 Oct 2023 10:48:00 +1100 (AEDT) From: Michael Ellerman To: Erhard Furtner , linuxppc-dev@lists.ozlabs.org Subject: Re: [Bisected] PowerMac G5 fails booting kernel 6.6-rc3 (BUG: Unable to handle kernel data access at 0xfeffbb62ffec65fe) In-Reply-To: <20230929132750.3cd98452@yea> References: <20230929132750.3cd98452@yea> Date: Thu, 12 Oct 2023 10:47:51 +1100 Message-ID: <87r0m0raag.fsf@mail.lhotse> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: willy@infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Erhard Furtner writes: > Greetings! > > Kernel 6.5.5 boots fine on my PowerMac G5 11,2 but kernel 6.6-rc3 > fails to boot with following dmesg shown on the OpenFirmware console > (transcribed screenshot): Thanks for transcribing all that :) I don't see this crash on my quad G5. I notice that your config has CONFIG_FLATMEM=y. Can you try switching to SPARSEMEM and see if that helps? It might help us narrow down the bug at least. cheers