On Wed, Sep 26, 2018 at 06:36:08PM +0200, Helge Deller wrote: > On 26.09.2018 15:29, Guenter Roeck wrote: > > On 09/26/2018 05:09 AM, John David Anglin wrote: > >> 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? > > > > 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. > > You didn't mention which kernel version you were using. > I did some testing with your rootfs & initrd, based on upstream git kernel > with the latest patches from my for-next tree: > https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/log/?h=for-next > > I did tested with my own 32-bit config and the 32bit-default-config. > > Overall I couldn't reproduce any issues. > Can you try to come up with some more info for what I should look at? > > Linux version 4.19.0-rc5-32bit+ (deller@ls3530) (gcc version 7.2.1 20170915 (Red Hat Cross 7.2.1-1) (GCC)) #733 SMP Wed Sep 26 18:13:01 CEST 2018 > CPU0: thread -1, cpu 0, socket 0 ... > smp: Bringing up secondary CPUs ... > smp: Brought up 1 node, 1 CPU Key difference: Your configuration has SMP enabled. Mine (using "defconfig") doesn't. The difference is default_defconfig vs. generic-32bit_defconfig. I'll add smp tests to my test suite. Guenter
