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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A938C33C99 for ; Tue, 7 Jan 2020 04:24:25 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D84D4206F0 for ; Tue, 7 Jan 2020 04:24:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="JTC16qCc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D84D4206F0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 4014C8E0013; Mon, 6 Jan 2020 23:24:24 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3B12B8E0001; Mon, 6 Jan 2020 23:24:24 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2EDB88E0013; Mon, 6 Jan 2020 23:24:24 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0224.hostedemail.com [216.40.44.224]) by kanga.kvack.org (Postfix) with ESMTP id 1A2118E0001 for ; Mon, 6 Jan 2020 23:24:24 -0500 (EST) Received: from smtpin23.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id A18AE180AD801 for ; Tue, 7 Jan 2020 04:24:23 +0000 (UTC) X-FDA: 76349546406.23.mine74_9286dc029117 X-HE-Tag: mine74_9286dc029117 X-Filterd-Recvd-Size: 3238 Received: from ozlabs.org (ozlabs.org [203.11.71.1]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Jan 2020 04:24:22 +0000 (UTC) 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 ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 47sK5Y66j8z9sRG; Tue, 7 Jan 2020 15:24:17 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1578371058; bh=VKOMCJ/k8+UtH9oQhQ+1uTXrYkuBzN9DP/SBN9pafhE=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=JTC16qCcquUWB7B8ZJ6iZwqiOveDKFP+MMW8bhOL2eZ9AYzh3VDHNv8s1SfcBYLhI o2TiSvd809hXUWZG6tI4dZSeyUnHKlGWKTe6x20e/TDNE6HGQfkroXkgDUVzPc0/lL OMVEqoAGVbmCUnBJLapjApZRZXXmZazUl5HSzBCxkshdZ1TwUsnOctoPrtVoQU6G/t Gv68pEjviqn/pRW5pjtnOmgdoNJ1shv0y7IfkvOFKaSYCKMydI2egqP/3HbGSLowoL c+xML1bKUAPR17KBqc9gj1E3KMTF5oWDEG/IXiVQlZyKtuzQ3JvdG9o9yk5HmlcX04 ApANEflE9aSYA== From: Michael Ellerman To: Mike Rapoport Cc: Benjamin Herrenschmidt , Paul Mackerras , linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mike Rapoport Subject: Re: [PATCH] powerpc: add support for folded p4d page tables In-Reply-To: <20200106060217.GA5444@rapoport-lnx> References: <20191209150908.6207-1-rppt@kernel.org> <20200102081059.GA12063@rapoport-lnx> <87v9ppi7ky.fsf@mpe.ellerman.id.au> <20200106060217.GA5444@rapoport-lnx> Date: Tue, 07 Jan 2020 15:24:15 +1100 Message-ID: <87tv5728sw.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Mike Rapoport writes: > On Mon, Jan 06, 2020 at 02:31:41PM +1100, Michael Ellerman wrote: >> Mike Rapoport writes: >> > Any updates on this? >> >> It's very ... big, and kind of intrusive. > > I've tried to split it to several smaller ones, but I couldn't find a way > to do it without breaking bisectability. Yeah I didn't necessarily mean splitting it, it's just a lot of churn. It seems to break qemu mac99 booting pmac32 defconfig, haven't had time to look any further: Loading compiled-in X.509 certificates rtc-generic rtc-generic: setting system clock to 2020-01-07T02:42:59 UTC (1578364979) BUG: Unable to handle kernel unaligned access at 0xf10af004 Faulting instruction address: 0xc01cc6c4 Vector: 600 (Alignment) at [ef0b5de0] pc: c01cc6c4: f_dupfd+0x6c/0xb8 lr: c01cc698: f_dupfd+0x40/0xb8 sp: ef0b5e98 msr: 9032 dar: f10af004 dsisr: 40000140 current = 0xef0b0000 pid = 1, comm = swapper Linux version 5.5.0-rc2+ (michael@alpine1-p1) (gcc version 9.2.1 20191127 (Ubuntu 9.2.1-20ubuntu3)) #8 Tue Jan 7 13:38:04 AEDT 2020 enter ? for help [ef0b5eb8] c000550c console_on_rootfs+0x44/0x90 [ef0b5ed8] c090d7c0 kernel_init_freeable+0x1a4/0x24c [ef0b5f18] c0005770 kernel_init+0x18/0x108 [ef0b5f38] c0017274 ret_from_kernel_thread+0x14/0x1c FAIL! Booting BE pmac32 cheers