Hi Andrew,
On Tue, Oct 15, 2019 at 02:53:27AM +0200, Andrew Lunn wrote:
> On Mon, Oct 14, 2019 at 04:06:04PM +0200, Daniel Wagner wrote:
> > Hi,
> >
> > I've trying to boot a RPi 3 Model B+ in 64 bit mode. While I can get
> > my configuratin booting with v5.2.20, the current kernel v5.3.6 hangs
> > when initializing the eth interface.
> >
> > Is this a know issue? Some configuration issues?
>
> Hi Daniel
>
> Please could you add a WARN_ON(1); in phy_queue_state_machine() and
> post the stack dump. That might help us figure out what is going on.
I tried to get a stack dump from the WARN_ON(1). The 'make defconfig'
seems not to enable it(?). Anyway I played a bit and noticed, that
depending which additional debug config switch is enabled the
problem disappears. The boot timing is important it seems.
After the feedback I got so far, it think my setup is 'special' in
sofar I don't boot from eMMC. Instead I rely on TFTP and NFS for
rootfs:
- kernel is configured as 'make defconfig' +
#
# Built in drivers
#
CONFIG_USB_LAN78XX=y
#
# Networking
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_INET=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# NFS
CONFIG_NFS_FS=y
CONFIG_NFS_V4=y
CONFIG_NFS_V4_1=y
CONFIG_NFS_V4_2=y
#
# Debugging
#
CONFIG_PRINTK_TIME=y
CONFIG_DEBUG_KERNEL=y
CONFIG_EARLY_PRINTK=y
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=7
# Embedded config to kernel. /proc/config.gz
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_KEXEC=y
- u-boot enables network interface, does DHCP
- fetches a PXE image
- PXE loads DTB, kernel and starts the kernel
- rootfs is supposed to be provided via NFS
Could it be that the networking interface is still running (from
u-boot and PXE) when the drivers is setting it up and the workqueue is
premature kicked to work?
Anyway, I keep trying to get some trace out of it.
Thanks,
Daniel
