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[108.223.40.66]) by smtp.gmail.com with ESMTPSA id 26-v6sm7931839pfs.168.2018.09.26.06.29.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Sep 2018 06:29:56 -0700 (PDT) Subject: Re: [PATCH] parisc: Remove PTE load and fault check from L2_ptep macro To: John David Anglin Cc: jejb@parisc-linux.org, Helge Deller , linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20180926032101.GA2458@roeck-us.net> From: Guenter Roeck Message-ID: <4ac3d6fe-ef61-546d-e9fa-c8189edd288a@roeck-us.net> Date: Wed, 26 Sep 2018 06:29:55 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/26/2018 05:09 AM, John David Anglin wrote: > Hi, > > On 2018-09-25 11:21 PM, Guenter Roeck wrote: >> This patch causes my parisc qemu tests to fail. >> Unfortunately I don't have any useful log output; the failure >> is silent. Reverting the patch fixes the problem. > Can you be more specific on how to run these tests? > > Dave > Sorry. Please see https://github.com/groeck/linux-build-test/tree/master/rootfs/parisc My tests enable a number of device and debug options on top of defconfig. Those are not necessary, though. The problem can be reproduced with defconfig. With the initrd available from there, and with an image built using 'defconfig', run qemu-system-hppa \ -kernel vmlinux -no-reboot \ -initrd rootfs.cpio.gz \ -append 'rdinit=/sbin/init console=ttyS0,115200' \ -nographic -monitor null I tested with qemu 2.12 and 3.0. Using "arch/parisc/boot/bzImage" as kernel image does not make a difference. Note: The initrd auto-reboots. To avoid that, add "noreboot" as additional command line option. Hope this helps, Guenter