Hi Greg,
On Sat, 6 Jul 2019 11:46:47 +0200 Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
>
> On Sat, Jul 06, 2019 at 07:44:12PM +1000, Stephen Rothwell wrote:
> >
> > On Sat, 6 Jul 2019 10:34:33 +0200 Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > >
> > > On Thu, Jul 04, 2019 at 10:24:50PM +1000, Stephen Rothwell wrote:
> > > >
> > > > This release produces a whole lot (over 200) of this message in my qemu
> > > > boot tests:
> > > >
> > > > [ 1.698497] debugfs: File 'sched' already present!
> > > >
> > > > Introduced by commit
> > > >
> > > > 43e23b6c0b01 ("debugfs: log errors when something goes wrong")
> > > >
> > > > from the driver-core tree. I assume that the error(?) was already
> > > > happening, but it is now being reported.
> > >
> > > What are you passing to qemu to get this? I just tried it myself and
> > > see no error reports at all. Have a .config I can use to try to
> > > reproduce this?
> >
> > It is a powerpc pseries_le_defconfig kernel and I run qemu like this:
> >
> > qemu-system-ppc64 -M pseries -m 2G -vga none -nographic -kernel vmlinux -initrd rootfs.cpio.gz
>
> Hm, I think my rootfs initrd might be quite simple compared to yours (it
> drops me into a busybox shell). Any pointers to where you created yours
> from?
Michael Ellerman gave it to me. It is very simple. Its /init is just
$ cat init
#!/bin/sh
# devtmpfs does not get automounted for initramfs
/bin/mount -t devtmpfs devtmpfs /dev
exec 0</dev/console
exec 1>/dev/console
exec 2>/dev/console
exec /sbin/init $*
and /sbin/init is a link to /bin/busybox
It is all run by an expect script that just waits for the login:
prompt, logs in a root and runs "halt".
All the debugfs messages appear before the kernel finished booting.
--
Cheers,
Stephen Rothwell
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