FYI, we noticed the below changes on git://bee.sh.intel.com/git/ydu19/linux cc-v4.7-on-3.16-rc3 commit 7360e0e63f2f26ad1ea1ff426572a111d3b0747e ("Implement Workload Consolidation in wakeup/fork/exec") +--------------------------------------------+------------+------------+ | | 3bccbb940e | 7360e0e63f | +--------------------------------------------+------------+------------+ | boot_successes | 12 | 18 | | boot_failures | 1 | 7 | | WARNING:CPU:PID:at_mm/mmap.c:exit_mmap() | 1 | | | BUG:Bad_rss-counter_state_mm:idx:val | 1 | | | BUG:unable_to_handle_kernel_paging_request | 0 | 7 | | Oops | 0 | 7 | | RIP:wake_up_new_task | 0 | 7 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 7 | | backtrace:do_fork | 0 | 7 | | backtrace:SyS_clone | 0 | 7 | +--------------------------------------------+------------+------------+ run: /lkp/lkp/src/monitors/wrapper cpuidle {} run: /lkp/lkp/src/monitors/wrapper turbostat {} run: /usr/bin/time -v -o /lkp/lkp/src/tmp/time /lkp/lkp/src/tests/wrapper will-it-scale {"test"=>"poll1"} [ 267.494213] BUG: unable to handle kernel paging request at ffffffffa1d96658 [ 267.502616] IP: [] wake_up_new_task+0x5d/0x190 [ 267.509874] PGD 1c1c067 PUD 1c1d063 PMD 0 [ 267.515024] Oops: 0000 [#1] SMP [ 267.519188] Modules linked in: ipmi_watchdog dm_mod fuse sg sr_mod cdrom mgag200 syscopyarea snd_pcm sysfillrect sysimgblt snd_timer ttm snd ahci soundcore drm_kms_helper libahci pcspkr sb_edac libata drm i2c_i801 edac_core wmi ipmi_si ipmi_msghandler [ 267.545771] CPU: 0 PID: 10268 Comm: poll1_processes Not tainted 3.16.0-rc4-00652-gddbdaf0 #1 [ 267.555975] Hardware name: Intel Corporation LH Pass/S4600LH...., BIOS SE5C600.86B.99.02.1047.032320122259 03/23/2012 [ 267.568659] task: ffff880428dbbb20 ti: ffff88042082c000 task.ti: ffff88042082c000 [ 267.577879] RIP: 0010:[] [] wake_up_new_task+0x5d/0x190 [ 267.588222] RSP: 0018:ffff88042082fe98 EFLAGS: 00010086 [ 267.595078] RAX: 00000000ffffffff RBX: 00007fffffffc140 RCX: ffffffff81d96660 [ 267.604010] RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000000000000080 [ 267.612942] RBP: ffff88042082fec0 R08: ffff880428af7020 R09: 0000000000000002 [ 267.621883] R10: ffff880428aff800 R11: 00000000002ac048 R12: ffff88041e7a9d90 [ 267.630847] R13: 0000000000000000 R14: ffff88041e7aa8d4 R15: 0000000000000246 [ 267.639835] FS: 00007ffff7fe0700(0000) GS:ffff88042fa00000(0000) knlGS:0000000000000000 [ 267.649922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 267.657410] CR2: ffffffffa1d96658 CR3: 0000000421202000 CR4: 00000000000407f0 [ 267.666487] Stack: [ 267.669848] 00007fffffffc140 ffff88041e7a9d90 0000000000000000 0000000000000000 [ 267.679326] 000000000000283d ffff88042082ff30 ffffffff8106c34d ffff880428dbbb20 [ 267.688824] 0000000000000000 ffff88007f77e400 ffffffff813dbf79 00007fffffffc310 [ 267.698336] Call Trace: [ 267.702283] [] do_fork+0x12d/0x3b0 [ 267.709162] [] ? free_cpumask_var+0x9/0x10 [ 267.716831] [] SyS_clone+0x16/0x20 [ 267.723741] [] stub_clone+0x69/0x90 [ 267.730756] [] ? system_call_fastpath+0x16/0x1b [ 267.738955] Code: c9 4c 89 e7 8b 72 18 ba 08 00 00 00 ff 50 40 89 c2 49 0f a3 94 24 18 03 00 00 19 c9 85 c9 0f 84 1f 01 00 00 48 8b 0d fb 94 7a 00 <48> 0f a3 11 19 d2 85 d2 0f 84 0a 01 00 00 89 c6 4c 89 e7 48 c7 [ 267.763659] RIP [] wake_up_new_task+0x5d/0x190 [ 267.771960] RSP [ 267.777351] CR2: ffffffffa1d96658 [ 267.782559] ---[ end trace 64e2f87937629f9b ]--- [ 267.794993] Kernel panic - not syncing: Fatal exception Disclaimer: Results have been estimated based on internal Intel analysis and are provided for informational purposes only. Any difference in system hardware or software design or configuration may affect actual performance. Thanks, Aaron