* Ingo Molnar wrote: > > here's another crash: > > here's a repeat bootup with the same config: and here's a new crash with a new config: [ 11.810471] Testing event timer_expire_exit: OK [ 11.850475] Testing event timer_cancel: OK [ 11.890508] Testing event hrtimer_init: OK [ 11.930469] Testing event hrtimer_start: OK [ 11.970475] Testing event hrtimer_expire_entry: [ 11.980002] BUG: unable to handle kernel NULL pointer dereference at (null) [ 11.980010] IP: [<(null)>] (null) [ 11.980010] *pde = 00000000 [ 11.980010] Oops: 0000 [#1] SMP [ 11.980010] last sysfs file: [ 11.980010] Modules linked in: [ 11.980010] [ 11.980010] Pid: 0, comm: swapper Not tainted 2.6.36-tip-05833-g9db2fad-dirty #52316 A8N-E/System Product Name [ 11.980010] EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 0 [ 11.980010] EIP is at 0x0 [ 11.980010] EAX: f6806a94 EBX: f6806a94 ECX: 00010000 EDX: 00000096 [ 11.980010] ESI: f65bdf50 EDI: f6806a00 EBP: f6806a30 ESP: c13dff04 [ 11.980010] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 11.980010] Process swapper (pid: 0, ti=c13de000 task=c13e2f20 task.ti=c13de000) [ 11.980010] Stack: [ 11.980010] c103d297 00000000 c10460c1 c13dff4c ca105369 00000002 ffffffff 7fffffff [ 11.980010] c103d52b ca105369 00000002 ca105369 0000002c f6806a00 00000000 f6806a04 [ 11.980010] ca105369 00000002 ca105369 00000002 00000000 f6805dac 00000000 c1420788 [ 11.980010] Call Trace: [ 11.980010] [] ? __run_hrtimer+0x91/0x105 [ 11.980010] [] ? tick_sched_timer+0x0/0x1a1 [ 11.980010] [] ? hrtimer_interrupt+0x108/0x20a [ 11.980010] [] ? smp_apic_timer_interrupt+0x66/0x75 [ 11.980010] [] ? apic_timer_interrupt+0x36/0x3c [ 11.980010] [] ? native_safe_halt+0x2/0x3 [ 11.980010] [] ? default_idle+0x66/0x91 [ 11.980010] [] ? cpu_idle+0x98/0xda [ 11.980010] [] ? start_kernel+0x2f7/0x2fc [ 11.980010] Code: Bad EIP value. [ 11.980010] EIP: [<00000000>] 0x0 SS:ESP 0068:c13dff04 [ 11.980010] CR2: 0000000000000000 [ 11.980010] ---[ end trace 74b10a949febd52e ]--- [ 11.980011] BUG: unable to handle kernel NULL pointer dereference at (null) [ 11.980011] IP: [<(null)>] (null) [ 11.980011] *pde = 00000000 [ 11.980011] Oops: 0000 [#2] SMP [ 11.980011] last sysfs file: [ 11.980011] Modules linked in: [ 11.980011] [ 11.980011] Pid: 0, comm: kworker/0:0 Tainted: G D 2.6.36-tip-05833-g9db2fad-dirty #52316 A8N-E/System Product Name [ 11.980011] EIP: 0060:[<00000000>] EFLAGS: 00010046 CPU: 1 [ 11.980011] EIP is at 0x0 [ 11.980011] EAX: f6a06a94 EBX: f6a06a94 ECX: 00010000 EDX: 00000092 [ 11.980011] ESI: f65bdf50 EDI: f6a06a00 EBP: f6a06a30 ESP: f6479ec0 [ 11.980011] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 [ 11.980011] Process kworker/0:0 (pid: 0, ti=f6478000 task=f64364e0 task.ti=f6478000) [ 11.980011] Stack: [ 11.980011] c103d297 00000000 c10460c1 f6479f08 ca1058de 00000002 ffffffff 7fffffff [ 11.980011] c103d52b ca1058de 00000002 ca1058de 0000002c f6a06a00 00000000 f6a06a04 [ 11.980011] ca1058de 00000002 ca1058de 00000002 00000000 f6a05dac 00000001 c1420788 [ 11.980011] Call Trace: [ 11.980011] [] ? __run_hrtimer+0x91/0x105 [ 11.980011] [] ? tick_sched_timer+0x0/0x1a1 [ 11.980011] [] ? hrtimer_interrupt+0x108/0x20a [ 11.980011] [] ? smp_apic_timer_interrupt+0x66/0x75 [ 11.980011] [] ? apic_timer_interrupt+0x36/0x3c [ 11.980011] [] ? native_safe_halt+0x2/0x3 [ 11.980011] [] ? default_idle+0x66/0x91 [ 11.980011] [] ? cpu_idle+0x98/0xda [ 11.980011] [] ? start_secondary+0x200/0x205 [ 11.980011] Code: Bad EIP value. [ 11.980011] EIP: [<00000000>] 0x0 SS:ESP 0068:f6479ec0 [ 11.980011] CR2: 0000000000000000 [ 11.980011] ---[ end trace 74b10a949febd52f ]--- [ 11.980011] Kernel panic - not syncing: Fatal exception in interrupt [ 11.980011] Pid: 0, comm: kworker/0:0 Tainted: G D 2.6.36-tip-05833-g9db2fad-dirty #52316 [ 11.980011] Call Trace: [ 11.980011] [] ? panic+0x4d/0x13a [ 11.980011] [] ? oops_end+0x72/0x7c [ 11.980011] [] ? no_context+0x10d/0x117 [ 11.980011] [] ? do_page_fault+0x0/0x37c [ 11.980011] [] ? bad_area_nosemaphore+0xa/0xc [ 11.980011] [] ? do_page_fault+0x1cd/0x37c [ 11.980011] [] ? rb_reserve_next_event+0x289/0x336 [ 11.980011] [] ? trace_hardirqs_off_thunk+0xc/0x10 [ 11.980011] [] ? do_page_fault+0x0/0x37c [ 11.980011] [] ? do_page_fault+0x0/0x37c [ 11.980011] [] ? error_code+0x6c/0x74 [ 11.980011] [] ? __run_hrtimer+0x91/0x105 [ 11.980011] [] ? tick_sched_timer+0x0/0x1a1 [ 11.980011] [] ? hrtimer_interrupt+0x108/0x20a [ 11.980011] [] ? smp_apic_timer_interrupt+0x66/0x75 [ 11.980011] [] ? apic_timer_interrupt+0x36/0x3c [ 11.980011] [] ? native_safe_halt+0x2/0x3 [ 11.980011] [] ? default_idle+0x66/0x91 [ 11.980011] [] ? cpu_idle+0x98/0xda [ 11.980011] [] ? start_secondary+0x200/0x205 [ 11.980010] Kernel panic - not syncing: Fatal exception in interrupt [ 11.980010] Pid: 0, comm: swapper Tainted: G D 2.6.36-tip-05833-g9db2fad-dirty #52316 [ 11.980010] Call Trace: [ 11.980010] [] ? panic+0x4d/0x13a [ 11.980010] [] ? oops_end+0x72/0x7c [ 11.980010] [] ? no_context+0x10d/0x117 [ 11.980010] [] ? do_page_fault+0x0/0x37c [ 11.980010] [] ? bad_area_nosemaphore+0xa/0xc [ 11.980010] [] ? do_page_fault+0x1cd/0x37c [ 11.980010] [] ? rb_reserve_next_event+0x289/0x336 [ 11.980010] [] ? trace_hardirqs_off_thunk+0xc/0x10 [ 11.980010] [] ? do_page_fault+0x0/0x37c [ 11.980010] [] ? do_page_fault+0x0/0x37c [ 11.980010] [] ? error_code+0x6c/0x74 [ 11.980010] [] ? __run_hrtimer+0x91/0x105 [ 11.980010] [] ? tick_sched_timer+0x0/0x1a1 [ 11.980010] [] ? hrtimer_interrupt+0x108/0x20a [ 11.980010] [] ? smp_apic_timer_interrupt+0x66/0x75 [ 11.980010] [] ? apic_timer_interrupt+0x36/0x3c [ 11.980010] [] ? native_safe_halt+0x2/0x3 [ 11.980010] [] ? default_idle+0x66/0x91 [ 11.980010] [] ? cpu_idle+0x98/0xda [ 11.980010] [] ? start_kernel+0x2f7/0x2fc Ingo