Re: [PATCH 5.4 00/60] 5.4.27-rc1 review

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On Fri, Mar 20, 2020 at 03:29:47AM +0530, Naresh Kamboju wrote:
> On Thu, 19 Mar 2020 at 18:52, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > This is the start of the stable review cycle for the 5.4.27 release.
> > There are 60 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 Sat, 21 Mar 2020 12:37:04 +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/v5.x/stable-review/patch-5.4.27-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-5.4.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> 
> Results from Linaro’s test farm.
> This regression is platform specific.
> 
> On arm64 dragonboard 410c-QC410E* the LT hugemmap05 and
> hackbench test cases started failing on this build and easy to reproduce.
> Where as on other arm64 platforms (juno-r2, nxp-ls2088) these test PASS.
> 
> These two test case scenario run on independent execution.
> 
> Steps to reproduce,
> cd /opt/ltp
> ./runltp -s hugemmap05
> 
> cd /opt/ltp/testcases/bin
> ./hackbench 50 process 1000
> ./hackbench 20 thread 1000
> 
> Test output log:
> --------------------
> hugemmap05.c:89: BROK: mmap((nil),402653184,3,1,6,0) failed: ENOMEM (12)
> tst_safe_sysv_ipc.c:99: BROK: hugemmap05.c:85: shmget(218431587,
> 402653184, b80) failed: ENOMEM (12)
> 
> Running with 50*40 (== 2000) tasks.
> fork() (error: Resource temporarily unavailable)
> Running with 20*40 (== 800) tasks.
> pthread_create failed: Resource temporarily unavailable (11)
> 
> 
> *
> RAM: 1GB LPDDR3 SDRAM @ 533MHz
> CPU: ARM Cortex-A53 Quad-core up to 1.2 GHz per core
> 
> https://qa-reports.linaro.org/lkft/linux-stable-rc-5.4-oe/tests/ltp-hugetlb-tests/hugemmap05
> https://qa-reports.linaro.org/lkft/linux-stable-rc-5.4-oe/tests/ltp-sched-tests/hackbench01
> https://qa-reports.linaro.org/lkft/linux-stable-rc-5.4-oe/tests/ltp-sched-tests/hackbench02

Any chance you can run 'git bisect' to find the issue here?

thanks,

greg k-h



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