Hi Maxime, On 16/03/2015 at 19:19:00 +0100, Maxime Ripard wrote : > Hi, > > On Tue, Feb 17, 2015 at 09:38:59AM +0100, Sebastian Andrzej Siewior wrote: > > * Maxime Ripard | 2014-06-13 16:25:06 [+0200]: > > > > >Preemptible hierarchical RCU implementation. > > >NR_IRQS:16 nr_irqs:16 16 > > >Unable to handle kernel NULL pointer dereference at virtual address 00000000 > > >pgd = c0004000 > > >[00000000] *pgd=00000000 > > >Internal error: Oops: 5 [#1] PREEMPT ARM > > >Modules linked in: > > >CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.3-rt4+ #11 > > >task: c05ecb28 ti: c05e2000 task.ti: c05e2000 > > >PC is at wake_up_process+0x8/0x40 > > >LR is at kthread_create_on_node+0xb0/0x178 > > … > > >Do you know what could be the cause of this, or is this any known issue? > > > > No. This is very early in the boot process. I upgrade the at91's timer > > patches but have no HW to actually check if this is still working. > > Do you have a link to these patches? > The issue has been solved at emtrion but I think the patches were not sent yet. The issue is that threading the timer IRQs leads to a crash because kthreadd is not started yet. -- Alexandre Belloni, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
