On 24 December 2013 19:18, Steven Rostedt rostedt@goodmis.org wrote:
Can you also produce this with just "echo 1 > /sys/kernel/debug/tracing/events/syscalls/enable"?
Will do that on 26th..
[ 299.998874] Unable to handle kernel NULL pointer dereference at virtual address 0000001b [ 300.005554] pgd = ed9fc000 [ 300.008201] [0000001b] *pgd=6eb1e831, *pte=00000000, *ppte=00000000 [ 300.014428] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 300.019812] Modules linked in: [ 300.022847] CPU: 0 PID: 2172 Comm: is-cpu-isolated Not tainted 3.13.0-rc1-00090-gd6eaf98-dirty #141
Are you running some isolated CPU test? Do you have NO_HZ_FULL enabled too?
Yeah, I am using NO_HZ_FULL with CPUSets. Only one task (stress) is running on CPU1 and CPU0 is running everything else..
I Cc'd Frederic too.
Note, I'm on PTO for two weeks (coming back Jan 6th), so I wont be debugging this any time soon. My wife has me debugging house issues (putting in a new floor for laundry room, painting, re-arranging furniture, etc). (I have to sneak to the computer in order to goof off and respond to this email ;-)
:)