[LTP] [PATCH 4.19 00/12] 4.19.210-rc1 review

[Richard Palethorpe]

Hello Naresh,

Naresh Kamboju <naresh.kamboju@linaro.org> writes:

> On Fri, 8 Oct 2021 at 17:00, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
>>
>> This is the start of the stable review cycle for the 4.19.210 release.
>> There are 12 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 Sun, 10 Oct 2021 11:27:07 +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-4.19.210-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-4.19.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
>
> Results from Linaro’s test farm.
> No regressions on arm64, arm, x86_64, and i386.
>
> Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
>
> NOTE:
> LTP version upgrade to LTP 20210927.
> The new case "cfs_bandwidth01" found the following warning.
> Since it is a new test case that found this warning can not be considered as
> regression.
> This warning is only seen on stable rc 4.19
> but not found on 4.14, 5.4, 5.10 and 5.14.
>
> Test output log:
> ----------------
> cfs_bandwidth01.c:57: TINFO: Set 'worker1/cpu.max' = '3000 10000'
> cfs_bandwidth01.c:57: TINFO: Set 'worker2/cpu.max' = '2000 10000'
> cfs_bandwidth01.c:57: TINFO: Set 'worker3/cpu.max' = '3000 10000'
> cfs_bandwidth01.c:118: TPASS: Scheduled bandwidth constrained workers
> cfs_bandwidth01.c:57: TINFO: Set 'level2/cpu.max' = '5000 10000'
> cfs_bandwidth01.c:130: TPASS: Workers exited
> cfs_bandwidth01.c:118: TPASS: Scheduled bandwidth constrained workers
> cfs_bandwidth01.c:57: TINFO: Set 'level2/cpu.max' = '5000 10000'
> cfs_bandwidth01.c:130: TPASS: Workers exited
> cfs_bandwidth01.c:118: TPASS: Scheduled bandwidth constrained work[
> 56.624213] ------------[ cut here ]------------
> [   56.629421] rq->tmp_alone_branch != &rq->leaf_cfs_rq_list

FWIW this appears to be the bug the test is intended to
reproduce. Originally seen on a SUSE enterprise 4.12 kernel.

-- 
Thank you,
Richard.