Running on a UEFI 32bit Atom E6xx system I see the following panic after several minutes running the following cyclictest command. root@sys940x:~# cyclictest -p 50 -d 10m -t -q # /dev/cpu_dma_latency set to 0us BUG: unable to handle kernel paging request at fffffff4 IP: [<c106a41c>] migrate_task_rq_fair+0x4c/0x100 *pde = 0198f067 *pte = 00000000 Oops: 0000 [#1] PREEMPT SMP Modules linked in: Pid: 649, comm: cyclictest Not tainted 3.8.4-rt2-yocto-preempt-rt #1 EIP: 0060:[<c106a41c>] EFLAGS: 00010046 CPU: 0 EIP is at migrate_task_rq_fair+0x4c/0x100 EAX: 00000000 EBX: deec43f0 ECX: 00000000 EDX: 00000000 ESI: dde8f948 EDI: c1983900 EBP: dee9fe58 ESP: dee9fe40 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 CR0: 80050033 CR2: fffffff4 CR3: 1ef64000 CR4: 000007d0 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff0ff0 DR7: 00000400 Process cyclictest (pid: 649, ti=dee9e000 task=def74170 task.ti=dee9e000) Stack: c197f060 00000000 00000000 00000000 deec43f0 00000001 dee9fec0 c1064ec5 c10380ce 00000010 dee9fe7c c1065894 de699ef0 619b7c30 00000000 dee9feac 00000010 00000000 dee9fea0 c1037f76 00000000 def74170 00000001 dee9ff28 Call Trace: [<c1064ec5>] set_task_cpu+0x55/0x1b0 [<c10380ce>] ? unpin_current_cpu+0xe/0x70 [<c1065894>] ? migrate_enable+0xc4/0x1c0 [<c1037f76>] ? pin_current_cpu+0x76/0x1c0 [<c106713c>] try_to_wake_up+0x18c/0x300 [<c10672ef>] wake_up_process+0x1f/0x40 [<c10595ed>] hrtimer_wakeup+0x1d/0x30 [<c10599cb>] __run_hrtimer+0x9b/0x260 [<c10595d0>] ? update_rmtp+0x90/0x90 [<c105ad62>] hrtimer_interrupt+0x272/0x320 [<c1645ed5>] smp_apic_timer_interrupt+0x55/0x87 [<c163f75d>] apic_timer_interrupt+0x2d/0x34 [<c163f48c>] ? resume_kernel+0x44/0x44 Code: 83 74 01 00 00 74 48 8d 4e 58 e8 94 2e 2c 00 89 45 f0 89 55 f4 8b 8b 78 01 00 00 8b 93 74 01 00 00 29 55 f0 19 4d f4 31 c0 31 d2 <8b> 49 f4 0b 4d f0 75 2c 89 83 74 01 00 00 89 93 78 01 00 00 8b EIP: [<c106a41c>] migrate_task_rq_fair+0x4c/0x100 SS:ESP 0068:dee9fe40 CR2: 00000000fffffff4 ---[ end trace 0000000000000002 ]--- Kernel panic - not syncing: Fatal exception in interrupt -- Darren Hart Intel Open Source Technology Center Yocto Project - Technical Lead - Linux Kernel -- 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
