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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 DB4BEC43218 for ; Fri, 26 Apr 2019 05:53:30 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2AFA3206E0 for ; Fri, 26 Apr 2019 05:53:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AFA3206E0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=depni.sinp.msu.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44r3BW3L85zDqZL for ; Fri, 26 Apr 2019 15:53:23 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (mailfrom) smtp.mailfrom=depni.sinp.msu.ru (client-ip=213.131.7.21; helo=depni-mx.sinp.msu.ru; envelope-from=belyshev@depni.sinp.msu.ru; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=depni.sinp.msu.ru X-Greylist: delayed 343 seconds by postgrey-1.36 at bilbo; Fri, 26 Apr 2019 15:00:24 AEST Received: from depni-mx.sinp.msu.ru (depni-mx.sinp.msu.ru [213.131.7.21]) by lists.ozlabs.org (Postfix) with ESMTP id 44r21P00fLzDqcv for ; Fri, 26 Apr 2019 15:00:24 +1000 (AEST) Received: from spider (unknown [109.63.154.231]) by depni-mx.sinp.msu.ru (Postfix) with ESMTPSA id 13A3D1BF404; Fri, 26 Apr 2019 07:56:30 +0300 (MSK) From: Serge Belyshev To: Christophe Leroy Subject: BUG: crash in __tlb_remove_page_size with STRICT_KERNEL_RWX on BOOK3S_32 Date: Fri, 26 Apr 2019 07:54:06 +0300 Message-ID: <87pnp9mknl.fsf@depni.sinp.msu.ru> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Mailman-Approved-At: Fri, 26 Apr 2019 15:51:58 +1000 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: linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi! Commit 63b2bc61956 aka "powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX" caused my old powerbook to crash under I/O. After "dd if=/dev/hda of=/null" the crash happens in seconds. Reverting the commit helps, as well as disabling STRICT_KERNEL_RWX. Unfortunately, I was unable to capture the oops via the usb serial console, as it stuck right after the first "BUG: Unable to handle kernel data access at 0xe0c29000" message. Oops screenshot: http://aargh.no-ip.org/oops.jpg