I'm seeing repeated hard lockups on my Dell Latitude E6530. Helpful info: 0) next-20150603 works, so the problem landed in linux-next in the last week.
1) All 3 times happened while I was at home, using wireless, so the interface didn't have link and was ifconfig'ed down. 2) Remarkably similar times for it to blow up: [14513.365378] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 1 [14482.271716] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 3 [14479.906820] Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 0 (I suspect the offsets were caused by differences in how long it took me to correctly enter the cryptLUKS passphrase for my encrypted root filesystem) Oddly enough, I don't see any patches to the e1000e driver in quite some time... but that's where it keeps locking up. This ringing any bells? All 3 traces look like: [14479.906908] Call Trace: [14479.906914] <NMI> [<ffffffffba94db16>] dump_stack+0x50/0xa8 [14479.906930] [<ffffffffba948bb9>] panic+0xcd/0x1e4 [14479.906940] [<ffffffffba166a60>] ? perf_event_task_disable+0xc0/0xc0 [14479.906952] [<ffffffffba125d8b>] watchdog_overflow_callback+0x9b/0xa0 [14479.906959] [<ffffffffba16a684>] __perf_event_overflow+0xc4/0x1f0 [14479.906968] [<ffffffffba16b3a4>] perf_event_overflow+0x14/0x20 [14479.906976] [<ffffffffba022271>] intel_pmu_handle_irq+0x1e1/0x430 [14479.906990] [<ffffffffba01a0f6>] perf_event_nmi_handler+0x26/0x40 [14479.906999] [<ffffffffba0085b3>] nmi_handle+0x103/0x340 [14479.907005] [<ffffffffba0084b5>] ? nmi_handle+0x5/0x340 [14479.907017] [<ffffffffba008a53>] default_do_nmi+0xc3/0x120 [14479.907032] [<ffffffffba008b98>] do_nmi+0xe8/0x130 [14479.907044] [<ffffffffba95c9a8>] end_repeat_nmi+0x1e/0x2e [14479.907055] [<ffffffffba529886>] ? e1000e_cyclecounter_read+0x16/0xc0 [14479.907061] [<ffffffffba529886>] ? e1000e_cyclecounter_read+0x16/0xc0 [14479.907069] [<ffffffffba529886>] ? e1000e_cyclecounter_read+0x16/0xc0 [14479.907075] <<EOE>> [<ffffffffba0e9529>] timecounter_read+0x19/0x60 [14479.907088] [<ffffffffba53687e>] e1000e_phc_gettime+0x2e/0x60 [14479.907098] [<ffffffffba536a31>] e1000e_systim_overflow_work+0x31/0x70 [14479.907105] [<ffffffffba07ad19>] process_one_work+0x3c9/0x980 [14479.907115] [<ffffffffba07ac62>] ? process_one_work+0x312/0x980 [14479.907125] [<ffffffffba07b348>] ? worker_thread+0x78/0x760 [14479.907134] [<ffffffffba07b59c>] worker_thread+0x2cc/0x760 [14479.907144] [<ffffffffba07b2d0>] ? process_one_work+0x980/0x980 [14479.907154] [<ffffffffba082a5e>] kthread+0xfe/0x120 [14479.907163] [<ffffffffba08ca50>] ? finish_task_switch+0x50/0x1c0 [14479.907173] [<ffffffffba082960>] ? kthread_create_on_node+0x270/0x270 [14479.907179] [<ffffffffba95ae4f>] ret_from_fork+0x3f/0x70 [14479.907188] [<ffffffffba082960>] ? kthread_create_on_node+0x270/0x270 [14479.907243] Kernel Offset: 0x39000000 from 0xffffffff81000000 (relocation range:
pgpaLGGXQq3pB.pgp
Description: PGP signature
