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Date:   Thu, 16 May 2019 11:57:48 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>
CC:     <torvalds@...ux-foundation.org>, <akpm@...ux-foundation.org>,
        <linux@...ck-us.net>, <shuah@...nel.org>, <patches@...nelci.org>,
        <ben.hutchings@...ethink.co.uk>, <lkft-triage@...ts.linaro.org>,
        <stable@...r.kernel.org>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        Michal Hocko <mhocko@...e.com>
Subject: Re: [PATCH 4.4 000/266] 4.4.180-stable review


On 15/05/2019 11:51, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 4.4.180 release.
> There are 266 patches in this series, all will be posted as a response
> to this one.  If anyone has any issues with these being applied, please
> let me know.
> 
> Responses should be made by Fri 17 May 2019 09:04:49 AM UTC.
> Anything received after that time might be too late.
> 
> The whole patch series can be found in one patch at:
> 	https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.4.180-rc1.gz
> or in the git tree and branch at:
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.4.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h


Boot regression detected for Tegra ...

Test results for stable-v4.4:
    6 builds:	6 pass, 0 fail
    15 boots:	6 pass, 9 fail
    8 tests:	8 pass, 0 fail

Linux version:	4.4.180-rc1-gbe756da
Boards tested:	tegra124-jetson-tk1, tegra20-ventana,
                tegra30-cardhu-a04

Bisect is point to the following commit ...

# first bad commit: [7849d64a1700ddae1963ff22a77292e9fb5c2983] mm, vmstat: make quiet_vmstat lighter

Reverting this on top v4.4.180-rc1 fixes the problem.  

Crash observed ...

[   17.155812] ------------[ cut here ]------------
[   17.160431] kernel BUG at /home/jonathanh/workdir/tegra/mlt-linux_stable-4.4/kernel/mm/vmstat.c:1425!
[   17.169632] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[   17.175450] Modules linked in: ttm
[   17.178859] CPU: 0 PID: 92 Comm: kworker/0:2 Not tainted 4.4.179-00160-g7849d64a1700 #8
[   17.186843] Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
[   17.193100] Workqueue: vmstat vmstat_update
[   17.197279] task: ee14e700 ti: ee17a000 task.ti: ee17a000
[   17.202663] PC is at vmstat_update+0x9c/0xa4
[   17.206921] LR is at vmstat_update+0x94/0xa4
[   17.211179] pc : [<c00cdd80>]    lr : [<c00cdd78>]    psr: 20000113
[   17.211179] sp : ee17bef8  ip : 00000000  fp : eef91ac0
[   17.222629] r10: 00000008  r9 : 00000000  r8 : 00000000
[   17.227840] r7 : eef99900  r6 : eef91ac0  r5 : eef8f34c  r4 : ee13dc00
[   17.234350] r3 : 00000001  r2 : 0000000f  r1 : c0a885e0  r0 : 00000001
[   17.240861] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[   17.247978] Control: 10c5387d  Table: ad02006a  DAC: 00000051
[   17.253708] Process kworker/0:2 (pid: 92, stack limit = 0xee17a210)
[   17.259957] Stack: (0xee17bef8 to 0xee17c000)
[   17.264301] bee0:                                                       ee13dc00 eef8f34c
[   17.272459] bf00: eef91ac0 c003b69c eef91ac0 ee17a038 c0a4ba60 eef91ac0 eef91ad4 ee17a038
[   17.280618] bf20: c0a4ba60 ee13dc18 ee13dc00 00000008 eef91ac0 c003b8f8 00000000 c09f6100
[   17.288778] bf40: c003b8b0 ee102a00 00000000 ee13dc00 c003b8b0 00000000 00000000 00000000
[   17.296937] bf60: 00000000 c0040ad0 00000000 00000000 00000000 ee13dc00 00000000 00000000
[   17.305094] bf80: ee17bf80 ee17bf80 00000000 00000000 ee17bf90 ee17bf90 ee17bfac ee102a00
[   17.313253] bfa0: c00409d0 00000000 00000000 c000f650 00000000 00000000 00000000 00000000
[   17.321412] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   17.329570] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[   17.337733] [<c00cdd80>] (vmstat_update) from [<c003b69c>] (process_one_work+0x124/0x338)
[   17.345893] [<c003b69c>] (process_one_work) from [<c003b8f8>] (worker_thread+0x48/0x4c4)
[   17.353966] [<c003b8f8>] (worker_thread) from [<c0040ad0>] (kthread+0x100/0x118)
[   17.361348] [<c0040ad0>] (kthread) from [<c000f650>] (ret_from_fork+0x14/0x24)
[   17.368553] Code: e5930010 eb05c417 e3500000 08bd8070 (e7f001f2) 
[   17.374633] ---[ end trace 17cf004302766810 ]---

Cheers
Jon

-- 
nvpublic

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