On Fri, Dec 15, 2017 at 09:57:46PM +0000, Linaro QA wrote:

Summary

kernel: 4.4.106-rc1 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git branch: linux-4.4.y git commit: 67065bd41780929c2b8406ac3dd5356e83cd2d19 git describe: v4.4.105-106-g67065bd41780 Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.4-oe/build/v4.4.105-106...

Regressions (compared to build v4.4.105-108-g894d367e5d93)

juno-r2 - arm64: ltp-syscalls-tests: * readahead02 * runltp_syscalls

readahead02 0 TINFO : read_testfile(0) used cache: 65468 kB readahead02 0 TINFO : read_testfile(1) used cache: 32592 kB readahead02 0 TWARN : readahead02.c:351: using less cache than expected

We're currently skipping readahead02 on x86, due to NFS. On Juno, we're running against a local disk now and so this is a new failure.

readahead02 warns with 'using less cache than expected' if it can't readahead more than 32768 kB, which this run fell just short of (32592 kB). I looked through a few recent jobs and most of the time it reads above 60000 kB but once it read 45456 and another time it read 32892 - just enough to pass.

I re-submitted the job three times to see if it's repeatable: - https://lkft.validation.linaro.org/scheduler/job/78222 - read 65340 (pass) - https://lkft.validation.linaro.org/scheduler/job/78223 - read 65356 (pass) - https://lkft.validation.linaro.org/scheduler/job/78224 - read 32624 (fail)

I looked through the 10 most recent builds on 4.9, 4.9-rc, 4.14, 4.14-rc, and mainline, and ALL of them read over 60000 kB on juno, so maybe there is an issue here. If there is a problem, it's with 4.4 generally, and not something in this specific RC.

Filed https://bugs.linaro.org/show_bug.cgi?id=3539

Dan

* test src: git://github.com/linux-test-project/ltp.git

Boards, architectures and test suites:

juno-r2 - arm64

• boot - pass: 20,
• kselftest - pass: 32, skip: 29
• libhugetlbfs - pass: 90, skip: 1
• ltp-cap_bounds-tests - pass: 2,
• ltp-containers-tests - pass: 28, skip: 36
• ltp-fcntl-locktests-tests - pass: 2,
• ltp-filecaps-tests - pass: 2,
• ltp-fs-tests - pass: 60,
• ltp-fs_bind-tests - pass: 2,
• ltp-fs_perms_simple-tests - pass: 19,
• ltp-fsx-tests - pass: 2,
• ltp-hugetlb-tests - pass: 22,
• ltp-io-tests - pass: 3,
• ltp-ipc-tests - pass: 9,
• ltp-math-tests - pass: 11,
• ltp-nptl-tests - pass: 2,
• ltp-pty-tests - pass: 4,
• ltp-sched-tests - pass: 14,
• ltp-securebits-tests - pass: 4,
• ltp-syscalls-tests - fail: 2, pass: 980, skip: 124
• ltp-timers-tests - pass: 12,

x15 - arm

• boot - pass: 20,
• kselftest - pass: 31, skip: 29
• libhugetlbfs - pass: 87, skip: 1
• ltp-cap_bounds-tests - pass: 2,
• ltp-containers-tests - pass: 64,
• ltp-fcntl-locktests-tests - pass: 2,
• ltp-filecaps-tests - pass: 2,
• ltp-fs-tests - pass: 60,
• ltp-fs_bind-tests - pass: 2,
• ltp-fs_perms_simple-tests - pass: 19,
• ltp-fsx-tests - pass: 2,
• ltp-hugetlb-tests - pass: 20, skip: 2
• ltp-io-tests - pass: 3,
• ltp-ipc-tests - pass: 9,
• ltp-math-tests - pass: 11,
• ltp-nptl-tests - pass: 2,
• ltp-pty-tests - pass: 4,
• ltp-sched-tests - pass: 13, skip: 1
• ltp-securebits-tests - pass: 4,
• ltp-syscalls-tests - pass: 1035, skip: 67
• ltp-timers-tests - pass: 12,

x86_64

• boot - pass: 20,
• kselftest - pass: 44, skip: 32
• libhugetlbfs - pass: 90, skip: 1
• ltp-cap_bounds-tests - pass: 2,
• ltp-containers-tests - pass: 64,
• ltp-fcntl-locktests-tests - pass: 2,
• ltp-filecaps-tests - pass: 2,
• ltp-fs-tests - pass: 61, skip: 1
• ltp-fs_bind-tests - pass: 2,
• ltp-fs_perms_simple-tests - pass: 19,
• ltp-fsx-tests - pass: 2,
• ltp-hugetlb-tests - pass: 22,
• ltp-io-tests - pass: 3,
• ltp-ipc-tests - pass: 9,
• ltp-math-tests - pass: 11,
• ltp-nptl-tests - pass: 2,
• ltp-pty-tests - pass: 4,
• ltp-sched-tests - pass: 9, skip: 1
• ltp-securebits-tests - pass: 4,
• ltp-syscalls-tests - pass: 956, skip: 164
• ltp-timers-tests - pass: 12,

Documentation - https://collaborate.linaro.org/display/LKFT/Email+Reports

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