linux-kernel - Re: [PATCH 4.4 00/37] 4.4.110-stable review

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Date:   Mon, 8 Jan 2018 15:38:02 -0500
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andy Lutomirski <luto@...nel.org>, Hugh Dickins <hughd@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Voegtle <tv@...96.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Shuah Khan <shuahkh@....samsung.com>, patches@...nelci.org,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        lkft-triage@...ts.linaro.org, stable <stable@...r.kernel.org>
Subject: Re: [PATCH 4.4 00/37] 4.4.110-stable review

Hi Greg,



On Mon, Jan 8, 2018 at 2:46 AM, Greg Kroah-Hartman
<gregkh@...uxfoundation.org> 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