Here is one more: [ 6.284763] EFI Variables Facility v0.08 2004-May-17 [ 6.555990] ------------[ cut here ]------------ [ 6.561145] kernel BUG at /scratch/ptatashi/linux-stable/mm/slub.c:3627! [ 6.568625] invalid opcode: 0000 [#1] SMP [ 6.573219] Modules linked in: [ 6.576639] CPU: 1 PID: 364 Comm: kworker/1:1 Not tainted 4.4.110_pt_stable #3 [ 6.584692] Hardware name: Oracle Corporation ORACLE SERVER X6-2/ASM,MOTHERBOARD,1U, BIOS 38050100 08/30/2016 [ 6.595766] Workqueue: events clocksource_watchdog_work [ 6.601611] task: ffff881fecd82b00 ti: ffff881fecda4000 task.ti: ffff881fecda4000 [ 6.609963] RIP: 0010:[<ffffffff811e704a>] [<ffffffff811e704a>] kfree+0x14a/0x150 [ 6.618419] RSP: 0000:ffff881fecda7d40 EFLAGS: 00010246 [ 6.624348] RAX: ffffffff8106c280 RBX: ffff883ff114bfc0 RCX: 00000000ffffffd8 [ 6.632314] RDX: 000077ff80000000 RSI: 0000000000000246 RDI: ffff883ff114bfc0 [ 6.640280] RBP: ffff881fecda7d58 R08: 0000000000000000 R09: ffff881fff917300 [ 6.648244] R10: 0000000000000000 R11: ffffea00ffc452c0 R12: ffff883fec2f4080 [ 6.656208] R13: ffffffff810a5bee R14: 00000000ffffffff R15: 0000000000000000 [ 6.664175] FS: 0000000000000000(0000) GS:ffff881fff840000(0000) knlGS:0000000000000000 [ 6.673208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 6.679623] CR2: 0000000000000000 CR3: 0000000001aa2000 CR4: 0000000000360670 [ 6.687587] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 6.695553] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 6.703516] Stack: [ 6.705759] ffff883ff114bfc0 ffff883fec2f4080 ffffffff819a26e8 ffff881fecda7e00 [ 6.714061] ffffffff810a5bee ffff881f00000020 ffff881fecda7e10 ffff881fecda7da8 [ 6.722363] ffffffff00000000 ffff881f00000000 ffff881fecda7d90 ffff881fecda7d90 [ 6.730666] Call Trace: [ 6.733400] [<ffffffff810a5bee>] kthread_create_on_node+0x14e/0x1a0 [ 6.740495] [<ffffffff810f9dd5>] clocksource_watchdog_work+0x25/0x40 [ 6.747679] [<ffffffff8109ef6f>] process_one_work+0x14f/0x400 [ 6.754181] [<ffffffff8109fbc4>] worker_thread+0x114/0x480 [ 6.760402] [<ffffffff8109fab0>] ? rescuer_thread+0x310/0x310 [ 6.766913] [<ffffffff810a56b5>] kthread+0xe5/0x100 [ 6.772456] [<ffffffff810a55d0>] ? kthread_park+0x60/0x60 [ 6.778580] [<ffffffff8170fa0f>] ret_from_fork+0x3f/0x70 [ 6.784608] [<ffffffff810a55d0>] ? kthread_park+0x60/0x60 [ 6.790721] Code: 8b 03 31 f6 f6 c4 40 74 04 41 8b 73 6c 4c 89 df e8 1c a8 fa ff e9 73 ff ff ff 4c 8d 58 ff e9 20 ff ff ff 49 8b 43 20 a8 01 75 d4 <0f> 0b 0f 1f 40 00 0f 1f 44 00 00 55 48 89 e5 41 57 41 56 41 55 [ 6.812429] RIP [<ffffffff811e704a>] kfree+0x14a/0x150 [ 6.818273] RSP <ffff881fecda7d40> [ 6.822177] ---[ end trace 4ce44d21c6d68eed ]--- On Mon, Jan 8, 2018 at 3:38 PM, Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> wrote: > Hi Greg, > > > > On Mon, Jan 8, 2018 at 2:46 AM, Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: >> On Sun, Jan 07, 2018 at 10:06:59AM -0500, Pavel Tatashin wrote: >>> Hi Greg, >>> >>> I reverted suse12 back to: >>> 13dae54cb229d078635f159dd8afe16ae683980b >>> x86/kaiser: Move feature detection up (bsc#1068032). >>> >>> And, still do not see the problem. So, whatever fixes the issue comes >>> before kaiser. >> >> Ok, thanks for the hint. >> >> As I can't duplicate this here at all, any specifics as to what >> hardware/procesor type this is? >> > > BIOS: > Version 2.17.1249. Copyright (C) 2016 American Megatrends, Inc. > BIOS Date: 08/30/2016 10:35:36 Ver: 38050100 > > ca-ostest442:linux-stable$ lscpu > Architecture: x86_64 > CPU op-mode(s): 32-bit, 64-bit > Byte Order: Little Endian > CPU(s): 40 > On-line CPU(s) list: 0-39 > Thread(s) per core: 2 > Core(s) per socket: 10 > Socket(s): 2 > NUMA node(s): 2 > Vendor ID: GenuineIntel > CPU family: 6 > Model: 79 > Model name: Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz > Stepping: 1 > CPU MHz: 1738.601 > BogoMIPS: 4396.18 > Virtualization: VT-x > L1d cache: 32K > L1i cache: 32K > L2 cache: 256K > L3 cache: 25600K > NUMA node0 CPU(s): 0-9,20-29 > NUMA node1 CPU(s): 10-19,30-39 > > Note, if I boot with nr_cpus=1, hang never happens, with nr_cpus=4 > happens but seldomly, and with all 40 CPUs happens on almost every > reboot. > > As Hugh Dickins suggested, I am going to show panic outputs, as I get > them. Here is one more panic (note output is not complete because > machine reboots): > > [ 6.276456] EFI Variables Facility v0.08 2004-May-17 > [ 6.384665] BUG: unable to handle kernel paging request at > ffff901fff5a6000 > [ 6.392461] IP: [<ffffffff8106bb08>] vmalloc_fault+0x1f8/0x340 > [ 6.398987] PGD 0 > [ 6.401242] Oops: 0000 [#1] SMP > [ 6.404866] Modules linked in: > [ 6.408287] CPU: 10 PID: 0 Comm: swapper/10 Not tainted > 4.4.110_pt_stable #2 > [ 6.416156] Hardware name: Oracle Corporation ORACLE SERVER > X6-2/ASM,MOTHERBOARD,1U, BIOS 3 > 8050100 08/30/2016 > [ 6.427226] task: ffff883ff1e28000 ti: ffff883ff1e24000 task.ti: > ffff883ff1e24000 > [ 6.435580] RIP: 0010:[<ffffffff8106bb08>] [<ffffffff8106bb08>] > vmalloc_fault+0x1f8/0x340 > [ 6.444819] RSP: 0000:ffff883ff1e27cc0 EFLAGS: 00010086 > [ 6.450749] RAX: ffff881fff5a6058 RBX: 00003ffffffff000 RCX: > 0000081fff5a6000 > [ 6.458714] RDX: ffff880000000000 RSI: ffff901fff5a6000 RDI: > 0000000000000000 > [ 6.466681] RBP: ffff883ff1e27cf0 R08: 0000000000000018 R09: > 000000000002d2de > [ 6.474647] R10: 0000000000032ef3 R11: 0000000000002e04 R12: > ffffc900000000f0 > [ 6.482615] R13: ffff880000000000 R14: ffff901fff5a6000 R15: > ffff881fff5a6000 > [ 6.490574] FS: 0000000000000000(0000) GS:ffff88407e600000(0000) > knlGS:0000000000000000 > [ 6.499607] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 6.506022] CR2: ffff901fff5a6000 CR3: 0000000001aa2000 CR4: > 0000000000360670 > [ 6.513989] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > 0000000000000000 > [ 6.521956] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: > 0000000000000400 > [ 6.529923] Stack: > [ 6.532169] ffff881fff5a6000[ 6.532405] ------------[ cut here > ]------------ > [ 6.532414] WARNING: CPU: 22 PID: 162