linux-kernel - Re: [PATCH 4.14 000/209] 4.14.158-stable review

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Date:   Fri, 6 Dec 2019 08:56:14 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     shuah <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        akpm@...ux-foundation.org, patches@...nelci.org,
        ben.hutchings@...ethink.co.uk, lkft-triage@...ts.linaro.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 4.14 000/209] 4.14.158-stable review

On 12/6/19 8:23 AM, shuah wrote:
> On 12/6/19 9:10 AM, Guenter Roeck wrote:
>> On 12/6/19 7:35 AM, shuah wrote:
>>> On 12/6/19 8:28 AM, Greg Kroah-Hartman wrote:
>>>> On Fri, Dec 06, 2019 at 08:24:36AM -0700, shuah wrote:
>>>>> On 12/4/19 10:53 AM, Greg Kroah-Hartman wrote:
>>>>>> This is the start of the stable review cycle for the 4.14.158 release.
>>>>>> There are 209 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, 06 Dec 2019 17:50:10 +0000.
>>>>>> 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-4.14.158-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-4.14.y
>>>>>> and the diffstat can be found below.
>>>>>>
>>>>>> thanks,
>>>>>>
>>>>>> greg k-h
>>>>>>
>>>>>
>>>>> Starting with Linux 4.14.157, 4.9.204, and 4.4.204 stables stopped
>>>>> booting on my system. It can't find the root disk. No config changes
>>>>> in between.
>>>>>
>>>>> I have been bisecting 4.14 and 4.9 with no luck so far. I updated
>>>>> to Ubuntu 19.10 in between.
>>>>>
>>>>> The only other thing I see is CONFIG_GCC_VERSION which is supported
>>>>> starting 4.18. I don't this boot failing issue on 4.19 + up. I am
>>>>> also chasing any links between this config and scripts and tools
>>>>> that generate the initramfs.
>>>>
>>>> Did you also upgrade your version of gcc?  I know I build those older
>>>> kernels with the latest version of gcc for build tests, but I do not
>>>> boot them.  I think everyone who still uses them uses older versions of
>>>> gcc.
>>>
>>> Yes. gcc version changed. That has been my strong suspect since I started poking around the CONFIG_GCC_VERSION.
>>>
>>
>> What version of gcc are you using ? I currently use gcc 8.3.0 for all
>> qemu boot tests (except for 3.16 which doesn't support it, or at least
>> it didn't when I last checked), and have not observed any problems.
>>
> 
> With the upgrade gcc version went from 8.3.0 to 9.2.1
> 
> Interestingly enough all the older 4.14, 4.9, and 4.4 kernel I have
> on the system boot just fine. It fails when build newer rcs with new
> gcc, boot fails.
> 
> I would really like to understand it just in case something in our
> kbuild scrips is the issue.
> 

v4.4.206 boots for me into qemu when compiled with gcc 9.2.0 (9.2.1 does not
appear to be an official release). So at least it isn't that simple. Let me
know if I can test anything else.

Thanks,
Guenter